| a | a axis | a climate |
| aa | aa channel | aa lava |
| abandoned mines | abatement | abbe refractometer |
| ablation | ablation area/zone | ablation cone |
| ablation meander core | ablation moraine | ablation till |
| abney hand level | abnormal fold | aboral |
| aborigine | abraham’s tree | abrasion |
| abrasive minerals | abrasive sand | abrasive wheels |
| abrasives | absarokite | absolute |
| absolute age | absolute humidity | absolute instability |
| absolute temperature | absolute time | absolute velocity |
| absolute zero | absorption | abstraction |
| abutment | abysomed structure | abyssal |
| abyssal floor | abyssal hill | abyssal plain |
| abyssal zone | acadian orogeny | acasta gneiss |
| acceleration | accelerometer | accessibility isopleth |
| accessory minerals | accident block | accidental inclusions |
| accordant | accordion fold | accretion hypotheses |
| achondrite | aciculate (adj) | acid baths |
| acid igneous rock | acid rain fall | acid rock |
| acidic | acmite | actinometer |
| active margin | active volcano | actonian |
| actual evapotranspiration | adamantine | adamellite |
| adaptation | adaptive radiation | adductor impressions |
| adhesion | adiabatic | adiabatic chart |
| adiabatic laps rate | adiabatic process | adit |
| adjacent sea | adjacent streams | adsorption |
| adularia | advance | advastea |
| advection fog | aegirine | aeolian abrasion |
| aeolian placers | aeolian processes | aeolian sediment |
| aeolianite | aerial photograph | aero survey map |
| aerobe | aerolites | aerological diagram |
| aerosol | aetosauria | af climate |
| after shock | agate | age group |
| age pyramid | age specific death rate | age structure |
| agent | agents of weathering | agglomerate |
| aggradation | aggregate | agnatha |
| agonic lines | agricultural density | agricultural limestone and lime |
| agriculture | aiguille | air aloft |
| air currents | air gun | air mass |
| air pollution | air pressure | air temperature |
| aircraft industry | alabaster | albedo |
| albian (adj) | albite twin | albite-epidote-amphibolite facies |
| albitization | aleution low | algae |
| algebraic sum | alid scale | alkali |
| alkali basalt | alkali granite | alkali igneous rocks |
| alkali lakes | alkali peridotite | alkali syneite |
| alkaline | alkaline rock | alkaline storage batteries |
| alkalinity | allanite | allases |
| alligator | allimetric frequency | allochem |
| allochthon | allochthonous (adj) | allopatric speciation |
| allophane | allotriomorphic | allotriomorphic texture |
| alloy | alluvial diamond | alluvial fan |
| alluvial placer deposits | alluvium | alpine orogeny |
| alternating axis | altiplanation | altitude |
| alto cumulus | alto stratus | alum |
| alum minerals | alumina refractory | alunite bleaching clay |
| am climate | amber | ambulacrum |
| amethyst | ammonoidea | amoeboid fold |
| amorphous | amosite | amphi symmetry |
| amphibian | amphiboles | amphibolite |
| amphibolite facies | amplitude | amygdaloidal structure |
| amygdule | anabatic (adj) | anabatic wind |
| anaglyph | analcite basalt | analcitisation |
| analycite syenite | analyser | analysis of igneous rocks |
| anamorphism | anastomosing channel | anatexis |
| anatomay of houses | anchi-eutectic rocks | ancient formations |
| ancient mantle (or) waste | ancient platform | ancient river |
| ancient topography | ancient volcano | andesite |
| andesite line | anemograph | anemometer |
| aneroid barometer | angle of depression | angle of elevation |
| angular momentum | angular rock fragment | angular unconformity |
| angular velocity | anhedral (euhedral) | anhydrite |
| anion | anisotropism | annual moisture index |
| annual temperature ring | annular drainage pattern | annular ring |
| anode | anomaly | anorthosite |
| antarctic air mass | antarctic circle | antecedent drainage |
| anthracite | anthropology | anthropometry |
| anti-conosive | antibiotic | antichlinal valley |
| anticlinal fold | anticline | anticorrosion |
| anticyclone | antimonial lead | antipodes |
| antitrade | apartheid | apex |
| aphanitic (adj) | aphelion | aphorlith |
| aplite | apogee | apparent dip |
| applied geography | aquamarine | aqueduct |
| aquiclude | aquifer | aquifuge |
| aragonite | arboreal | arborescant |
| arc of the meridian | archaeological map | archaic |
| archean | archeological | arctic air mass |
| arctic circle | arctic front | arctic frontal zone |
| arctic kindred | arctrench gap | arcuate delta |
| areal extent | areal graph | arenaceons rock |
| arete | argillaceous | argillaceous rock |
| argillisation | aridity | aridity index |
| arithmatic density | arithmatic progression | armouring |
| arroyo | artefacts | artesian |
| artesian basins | artesian conditions | artesian well |
| arthropoda | artificial brines | artificial recharge |
| as | as-plane | asbestine |
| asbestos | ascending spring | aseismic plates |
| ash fall tuft | ash flood | asperity |
| asphalt | assimilation | assortation of sediments |
| asteroid | asthenosphere | astrobleme |
| astrogeology | astronomical map | astronomy |
| astrophic balance | astrophysics | asymetric fold |
| atlas | atmosphere | atmospheric gases |
| atoll | atomic energy | atomic reactor |
| atomic welding | atomsphere | atomspheric pressure |
| attrition | augen structure | augite |
| augitite | aurede | auriferous deposits |
| aurora | automorphic | auvulson |
| avalanche | average | aw climate |
| axial plane | axial plane faces | axial ratio |
| axis | axis of a fold | axis of symmetry |
| azimuth | azimuthal | azoic zone |
| b climate | back radiation | background radiation |
| backward bearing | bacterial process | bad conductors of heat |
| bad lands | bald | baldheaded anticline |
| ball | ball and socket joint | ball clay |
| balm | band | band graph |
| banded structure | bank | bank of river |
| bank storage | bar | bar diagram |
| barbed drainage | barkhan | barogram |
| barograph | barometer | barrage (reservoir) |
| barrier reef | barrow | barter |
| barysphere | basal pinacoid | basalt |
| basanite | base flow | base level |
| base level of erosion | base line | base map |
| base metal | basic igneous rocks | basic inventory |
| basin | basin method of recharge | batholith |
| bauxite bleaching clay | bauxite deposits | bay |
| beach | beach placer formation | bearings |
| bearings of landmarks | beaufort scale | beaufort wind scale |
| becke line | bed | bed rock |
| bedded vein | bedding | bedding, concordant |
| bedding, discordant | belt | belt of cementation |
| bench | bench lava | bench mark |
| bench placers | bend | beneficiation |
| benthic zone | benthos | bertrand lens |
| beryl | bevel | beveling |
| bifurcation ratio | binary magmas | binary symmetry |
| binodal line | biochemical deposits | bioclimatic frontier |
| biological selection | biological weathering | biosphere |
| birefringence | birth rate | bisectrix |
| bitter lakes | bituminous | black band iron ore |
| black body | black body radiation | black cotton soil |
| black opal | black roller | black sands |
| bladed | blast furnace | blasting |
| bleach spot | blind valley | blizzard |
| block diagram | block lava | block pile diagram |
| blood rain | blood stone | blooms |
| blowout | blowpipe | blue printing |
| blunt | bog ore | bogs |
| bond | bonitative map | bonnes projection |
| book of mica | bora | borates |
| borax | bore | bore hole |
| bore well | boreal forest | boring |
| bort | botryoidal | bottom |
| bottom current | boulders | boundary |
| boundary conditions | boundary layer | bowne ratio |
| brachiated rock | brachy axis | brachy pinacoid |
| brachycephalic | brachydome | brachysyncline |
| braided drainage | brakish water | brazilian |
| breached cone | breaker | breaker depth |
| breaker terrace | breccia deposits | breccia dike |
| breedor reactor | brick | brine |
| briquette | bronze | bronze age |
| brook | brow | brown race |
| building minerals | building patterns | building stones |
| bulk | bulk density | bulk sample |
| bunstone | buoy | bwk, bsk |
| c climate | c horizon | caballing |
| cabble | cable tool | cabra numbers |
| cacimbo | cadestral map | caju rain |
| cake of gold | caking coal | calcareous ooze |
| calcareous soil | calcic igneous rocks | calcification |
| calcite compensation depth | calcium | calcium-bomb process |
| calcrete | calctufa | caldera |
| caliche | california current | calina |
| calipher log | calm | calm belt |
| calms of cancer | calms of capricorn | calstic material |
| calved ice | calving | camber |
| camptonite | canada balsam | canary current |
| candlemas eve winds | cannel coal | cannel shale |
| canneloid | canoe | canterbury northwester |
| canyon | canyon bench | canyon fill |
| canyon wind | cap cloud | cap rock |
| capacity of the wind | cape | cape doctor |
| cape horn current | capillary | capillary creep |
| capping | caprock of oil beds | carabine |
| carapace | carbon black | carbon cycle |
| carbon equivalent | carbon potential | carbon ratio |
| carbon restoration | carbonaceous | carbonaceous chondrite |
| carbonaceous rock | carbonaceous shale | carbonate rock |
| carbonation | carboniferous coal bed | carcenet |
| cardinal point | cardinal winds | caribbean current |
| caribbean sea | carnivorous (adj) | carnotite |
| carolina bay | carrying capacity | cartographic abbreviation |
| case hardening | cash crop | cast (n) |
| cast iron | cast steel | castellatus |
| catachosis | cataloguing | cataract |
| catastrophism | catastrophist | catazone |
| catchment area | cathode | cat’s paw |
| cauldron subsidence | caustobiolith | cavaburd |
| cave breccia | cave deposits | cave pearl |
| caver | cavern | cavernous |
| caves | cavitation erosion | cavity |
| cavity filling | cay | cay sandstone |
| ceiling | ceiling classification | celestial geodesy |
| cell wall | cells of low pressure | cellular convection |
| celsius scale | cement copper | cement gravel |
| cementation | cementing material | cemetery |
| cenozoic age | cenozoic era | census |
| center jump | center of action | centering |
| centering pork | central eruption | central eye |
| central pressure | central water | centre of gravity |
| centre of symmetry | centrifugal force | centroclinal (adj) |
| cephalic index | cephalopods | ceramic materials |
| ceramics | cereal | cerium |
| cers | cettilet index | chadacryst |
| chain | chain lightning | chain survey |
| chalcolithic | chalk abrasive | challiho |
| chandler period | chandler wobble | chanduy |
| change chart | change of tide | channel fill |
| channel method | channel mouth bar | channel roughness |
| channel sand | channel width | channel-lag deposit |
| channels | chaplet | chapman equation |
| chapman region | character | characteristic sheet |
| characteristics | charnockite | chart |
| charted depth | chatoyancy | chemical alteration |
| chemical changes | chemical composition | chemical compound |
| chemical denudation | chemical minerals | chemical pollution |
| chemical reservoir | chemical weathering | chemosphere |
| chenier | chergui | chesil |
| chestnut coal | chetirification | chili |
| chill wind factor | chimney | chimney cloud |
| chimney rock | chinook | chinook wind |
| chipping | chisel | chlorinity |
| chondrite | chondrule | chonolith |
| choppy sea | chorochromatic maps | chorography |
| chorology | choropleth maps | chromizing |
| chronostratigraphy | chronozone | chrysoprace |
| chubasco | chubb | cinnabar |
| circle of equl altitude | circle of illumination | circular polarization |
| circulation | circulation flux | circulation index |
| circulation pattern | cirriform | cirrocumulus cloud |
| cirrostratus cloud | cirrus cloud | cist |
| cistern | civilization | claimatic maps |
| clamping shrew | clan | classification |
| clast | clastic | clastic dike |
| clastic pipe | clastic ratio | clastic reservoir |
| clastic rock | clastic sediment | clastic wedge |
| clay | clay belt | clay deposits |
| clay gall | clay iron stone | clay loam |
| clay marl | clay plug | clay residual formation |
| clay shale | clay soil | clay vein |
| claypan | claystone | cleavage |
| cleavings | clett | cliff |
| cliff rock | climate | climatic change |
| climatic classification | climatic controls | climatic cycle |
| climatic diagram | climatic divide | climatic factor |
| climatic forecast | climatic optimum | climatic prediction |
| climatic province | climatic snow line | climatic types |
| climatic zone | climatography | climatological forecast |
| climatological station elevation | climatological station pressure | climatological substation |
| climatology | climbing dune | clino axis |
| clinodome | clinoform | clinograph |
| clinohedral class | clinometer | clint |
| closed fold | closed form | closed high |
| closed low | closed sea | closed traverse |
| cloud | cloud absorption | cloud band |
| cloud bank | cloud bar | cloud base |
| cloud classification | cloud cover | cloud deck |
| cloud discharge | cloud drift | cloud droplet |
| cloud echo | cloud families | cloud formation |
| cloud forms | cloud height | cloud layer |
| cloud level | cloud modification | cloud particle |
| cloud physics | cloud racks | cloud reflection |
| cloud seeding | cloud shield | cloud street |
| cloud symbol | cloud system | cloud top |
| cloud-phase chart | cloud-to-cloud discharge | cloud-to-ground discharge |
| cloudburst | cloudburst hardness test | cloudburst treatment |
| cloudlet | cloudy | clough |
| cluster | cluster mill | clustered settlement |
| co-efficient of correlation | co-efficient of storage | coagulate |
| coakade ore | coal | coal ball |
| coal bed | coal breccia | coal fields |
| coal measures | coal pebbles | coal petrology |
| coalesced copper | coalescence efficiency | coalescence process |
| coalification | coarse fragment | coarse-grained |
| coast | coast sediment | coastal current |
| coastal dune | coastal landform | coastal plain |
| coastline | cobble | cockeyed bob |
| cocurrent line | code index | coefficient of permeability |
| coefficient of variability | cognate | cognate ejecta |
| cognate fissures | coherent deposit | cohesion |
| cohesionless | cohesive soil | cohesiveness |
| coil breaks | coin gold | coin silver |
| coke | cokeite | coking coal |
| col | colatitude | cold dome |
| cold front | cold glacier | cold high |
| cold low | cold pool | cold snap |
| cold tongue | cold wall | cold wave |
| cold-front thunderstorm | cold-front-like sea breeze | cold-water desert |
| cold-water sphere | colla | collada |
| collapse breccia | collapse sink | collapse structure |
| collector well | colloform | colloid |
| colloidal instability | colloids in soils | colluvium |
| colonies | colorado low | colour index |
| columnar jointing | columnar resistance | columnar section |
| columnar structure | comb | comber |
| combination coefficient | combination trap | combined water |
| comet | communication satellite | compact |
| compact rocks | comparative scale | compass |
| compass points | compensation depth | compensator |
| competence | competent beds | complementary rocks |
| complete fusion | complete joint penetration | complex |
| complex dune | complex fold | complex low |
| complex tombolo | complex traits | composed fertilizer |
| composite compact | composite cone | composite dike |
| composite flash | composite fold | composite grain |
| composite intrusion | composite joint | composite plate |
| composite sequence | composite topography | composite unconformity |
| composite vein | composition | composition of population |
| composition plane | compositional maturity | compound |
| compound alluvial fan | compound compact | compound crystal |
| compound die | compound fault | compound ripple marks |
| compound volcano | compressed | computing scale |
| concave fillet weld | concave slope | concentration |
| concentric faults | concentric fold | concentric fractures |
| conchoidal | conchoidal fracture | conchoidal structure |
| concordant | concordant body | concordant coastline |
| concordant intrusion | concrete steel | concretion |
| concretionary | concretioning | concurrent heating |
| concussion fracture | condensate field | condensation |
| condensation cloud | condensation level | condensation nucleus |
| condensation pressure | condensation trail | condenser |
| condensing lens | conditional instability | conditional stability |
| conduction | conduction of heat | conductive capacity |
| conductivity | conduit | cone |
| cone karst | cone of depression | cone of escape |
| cone sheet | cone-in-cone structure | confection |
| confined aquifer | confining bed | confining pressure |
| conformability | conformable | conformality |
| conformity | confused sea | congeal |
| congelifraction | congeliturbate | congeliturbation |
| conglomerate | congruent evaporation | congruent melting |
| congruent transformation | coniferous forest | conjugate |
| conjugate joint system | conjugated veins | connate |
| connate water | conoscopic illumination | conrad discontinuity |
| consanguinity | consequent | consequent stream |
| consequent valley | conservation of mineral resources | conservative concentrations |
| consolidated ice | consolidation | constant level chart |
| constant-height chart | constant-height surface | constant-pressure chart |
| constituent number | constitution diagram | constricting nozzle |
| consumptive use | contact deposit | contact metamorphic deposit |
| contact metamorphism | contact metasomatic deposits | contact metasomatism |
| contact of rock formation | contact spring | contact tube |
| contact twins | contact zone | contaminated rocks |
| contamination | contemporaneous (adj) | contemporary loose deposits |
| continent | continent formation | continental accretion |
| continental air | continental air mass | continental borderland |
| continental crust | continental deposits | continental divide |
| continental drift | continental geosyncline | continental growth |
| continental heat flow | continental high | continental margin |
| continental mass | continental nucleus | continental plate |
| continental polar air | continental rise | continental shelf |
| continental slope | continental terrace | continental tropical air |
| continuity bond | continuity chart | continuous permafrost zone |
| continuous precipitation | continuous profiling | continuous sequence |
| contour code | contour forming | contour interval |
| contour, contour line | contourite | contra solem |
| contraception | contraction hypothesis | contraction rule |
| contrastes | control day | control well |
| controlling quality | convection | convection cell |
| convection current | convection level free | convection rainfall |
| convection theory of cyclones | convectional current | convectional current theory |
| convectional instability | convective activity | convective cloud |
| convective condensation level | convective precipitation | convective region |
| convergence | convergence line | convergent precipitation |
| convergent zone paths | convex slope | convolute bedding |
| cool current | cool time | coplites |
| copper deposits | coracle | coral |
| coral bank | coral head | coral mud |
| coral pinnacle | coral rag | coral reef |
| coral reef oil reservoirs | coral sand | coral-reef lagoon |
| coral-reef shoreline | corallian | cordillera |
| cordilleran geosyncline | cordonazo | core |
| core analysis | core drilling | corer |
| coriolis parameter | corn snow | corner |
| corniferous | corniferous limestone | coromell |
| corona | corrasion | corrected altitude |
| corrected bearings | correlation | corrode (v) |
| corrosiveness | corundum | cosmetic talc |
| cosmic sediment | cosmogony | cotidal line |
| coulee | counter current | counter radiation |
| country rock | cove | cover half |
| crachin | crack | crag |
| crag and tile | cranial index | crater |
| crater cone | craton | creep |
| crescent beach | crest | crest cloud |
| crest length | crest line | crestal plane |
| cretaceous (adj) | crevasse | crevasse deposit |
| crevice | crevice corrosion | criador |
| criteria of replacement | critical angle | critical bottom slope |
| critical cooling rate | critical diameter | critical level of escape |
| critical range | critical strain | critical temperature |
| crivetz | crocidolite | crocidolite asbestos |
| cromwell current | cropping | cross bedding |
| cross fault | cross fold | cross joint |
| cross sea | cross section | cross staff |
| crosscutting relationships | crosswind | crown |
| crucible | crude asbestos | crude oil |
| crude oil fields | crumb structure | crumbled rocks |
| crush | crush breccia | crush conglomerate |
| crush fold | crush zone | crushed and broken stone |
| crust | crust of earth | crust of weathering |
| crustal motion | crustification | crustified veins |
| cryoconite | cryoconite hole | cryomorphology |
| cryopedology | cryoplanation | cryosphere |
| cryostatic pressure | crypto crystalline texture | cryptoclastic (adj) |
| cryptocrystalline | cryptovolcanic | crystal |
| crystal face | crystal form | crystal lattice |
| crystal phase | crystal sandstone | crystal setting |
| crystal structure | crystal tuff | crystal-vitric tuff |
| crystalline aggregates | crystalline fracture | crystalline porosity |
| crystallisation | crystallite | crystallization of magma |
| crystalloblastic texture | crystallogeny | crystallographic changes |
| cube | cubic lattice | cubic system |
| cuboidal joint | cuesta | culmination |
| cultural aspect | cultural change | cultural contact |
| cultural effect | cultural landscape | cumulative error |
| cumulative graph | cumuliform cloud | cumulonimbus |
| cumulus | cumulus cloud | cumulus congestus cloud |
| cumulus humilis cloud | cumulus mediocris cloud | cup coral |
| cup fracture | cup-and-ball joint | cupel |
| cupellation | cupped pebble | cupping |
| cupriferous mineralisation | curly hair | curragh |
| current | current constants | current curve |
| current cycle | current diagram | current difference |
| current ellipse | current hour | current mark |
| current tables | current-bedding | currents |
| curtain | curvature | curve matching |
| cusp | cuspate bar | custard winds |
| customs | cut-and-carry method | cutbank |
| cuticle | cutoff high | cutoff low |
| cutting process | cutting-off process | cyanamide |
| cyanidation | cyanide process | cyanide pulp |
| cycle of sedimentation | cycle, annealing | cyclic salt |
| cyclic sedimentation | cyclogenesis | cyclolysis |
| cyclone | cyclone family | cyclone wave |
| cyclonic | cyclonic scale | cyclonic storm |
| cyclothem | cylinder |
| d climate | d layer | d region |
| dacite | dacite glass | dactylitic |
| dadur | daily forecast | daily mean |
| daily variation | damp air | damp haze |
| dangerous semicircle | dark gray | dark segment |
| darling shower | darwin glass | darwin-doodson system |
| dating | datumline | davidson current |
| dawn | day degrees | day light |
| de vries effect | de witte relation | dead burned dolomite |
| dead cave | dead language | dead sea |
| dead water | dead wind | death rate (mortality rate) |
| debris | debris avalanche | debris cone |
| debris fall | debris flow | debris slide |
| decay | decay area | decay distance |
| decay of wave | deccan basalt | deciduous forest |
| declination | decollement | decomposition |
| decrepitation | decussate structure | dedolomitization |
| deep | deep inland sea | deep scattering layer |
| deep water | deep-sea basin | deep-sea channel |
| deep-sea plain | deep-sea trench | deep-water wave |
| deficit, birth | deflation | deflation basin |
| deflection angle | deflection of the vertical | deflourination |
| deformation | deformation fabric | deformation of rocks |
| degradation | degradation recrystallization | degree |
| dell | delta | delta plain |
| delta region | deltaic deposits | deltoid dodecahedron |
| deluvial placer | deluvium | demographic stage |
| demographic transition | demography | dendritic |
| dendritic drainage | dendritic valleys | dendrochronology |
| denominator | density altitude | density channel |
| density current | density of population | density ratio |
| denudation | departure | depegram |
| dependency ratio | dependent sea | depocenter |
| deposition | depositional sequence | depositional strike |
| deposits | depression | depth |
| depth of compensation | depth zone | derived wave |
| dermolith | desalination | descendant |
| descending spring | descriptive meteorology | desert |
| desert climate | desert pavement | desert polish |
| desert soil | desert varnish | desert wind |
| desiccation breccia | design water depth | desilication |
| detached core | detector | determinism |
| detrainment | detrital deposit | detrital remanent magnetization |
| detrital reservoir | detrital sediment | detrites |
| detritus | deuteric | developable surface |
| developed countries | developing countries | development |
| development index | development of wells | deviating force |
| deviatoric stress | devitrification | dew |
| dew frouit temperature | dew point | dew-point formula |
| dew-point spread | dew-point temperature | dextral drag fold |
| dextral fault | dextral fold | dharwar system |
| diabase | diachronism | diachronous |
| diaclinal | diad | diagenesis |
| diagnosis | diagnostic equation | diagonal axis |
| diagonal fault | diagonal joint | diagonal scale |
| diagonal symmetry | diagram | diamond |
| diamond deposits | diamond matrix | diapir fold |
| diastem | diatomaceous earth | diatomite |
| diatoms | diatreme | dichroism |
| dietary type | difference of latitude | difference of longitude |
| differential analysis | differential birthrate | differential chart |
| differential compaction | differential death rate | differential erosion |
| differentiated intrusion | differentiation | differentiation by assimilation |
| differentiation by crystallization | differentiation by filtration | differentiation by liquid immiscibility |
| differentiation, gravitational | diffuse aurora | diffuse deflection |
| diffuse front | diffusion | diffusion diagram |
| diffusive equilibrium | digenite | dihexagonal prism |
| dihexagonal pyramid | dike | dike ridge |
| dike set | dike swarm | dilatancy |
| dilation veins | dimmerfoehn | dimorphous |
| dinarides | dinoflagellates | diorite |
| dip | dip angle | dip fault |
| dip joint | dip slip | dip slope |
| dip-strike symbol | diploid | dipmeter log |
| direct cell | direct circulation | direct tide |
| direction transmitter | directional structure | directive tenures |
| dirt band | dirt bed | discharge |
| discontinuity | discontinuous reaction series | discordance |
| discordant intrusions | discordant intrusive | discordant pluton |
| disharmonic fold | dishpan experiment | disinfection |
| disintegration | dismicrite | dispersal pattern |
| dispersed elements | dispersed settlement | dispersion |
| disphotic zone | displaced ore body | displacement |
| dissected | dissected topography | dissection |
| disseminated | disseminated replacement deposits | dissemination |
| dissipation constant | dissociation | distillation |
| distorted form | distorted water | distortion |
| distributary | distribution | distribution maps |
| distribution of population | disturbance | ditch |
| ditch and furrow method | diurnal | diurnal inequality |
| diurnal monsoon | diurnal tide | diurnal variation |
| divergence | divergence loss | diversity |
| divide | divided circle | doab |
| doctor | dodecahedron | dodecahedron truncate |
| dogger | doister | doldrums |
| dolerite | dolico cephalic (adj) | doliomorphic rock |
| dolocast | dolomitization | dome |
| domes oil traps | donau glaciation | doodlebug |
| dot map | double ebb | double refraction |
| double tide | doubly punging fold | down |
| down valley breeze | downcutting | downdip |
| downrush | downthrow | downwarp |
| drag and drag ore | drag fold | drag mark |
| drainage | drainage basin | drainage channel |
| drainage density | drainage divide | drainage pattern |
| draping | dravidian linguistic family | drawdown |
| drawing instruments | dredges | dredging |
| dreikanter | drift | drift bottle |
| drift card | drift current | drift dam |
| drift ice | drift station | drift weed |
| drifting snow | drill bit | drilling |
| drilling mud | drilling time log | dripstone |
| driven snow | drizzle | drizzle drop |
| drop-size distribution | droplets | dropsonde observation |
| drought | drowned atoll | drowned coast |
| drowned valley | drumlin | druse |
| drusy | dry adiabat | dry adiabatic (adj) |
| dry adiabatic lapse rate | dry adiabatic process | dry air |
| dry climate | dry farming | dry fog |
| dry haze | dry permafrost | dry quicksand |
| dry sand | dry subtropical climate | dry tongue |
| dry tropical climate | dry valley | dry wash |
| drying rot | drying shrinkage | drystone |
| dualism | ductility | ducting |
| dugwell | dull coal | dumpy level |
| dun | dune | dune complex |
| duplicatus | durain | duration |
| duricrust | dusenwind | dust |
| dust avalanche | dust cloud hypothesis | dust devil |
| dust horizon | dust storm | dust whirl |
| dust-devil effect | dutch cone penetration | dwigh |
| dwyka tillite | dyke | dyke swarms |
| dynamic cyclone | dynamic geomorphology | dynamic height |
| dynamic inversions | dynamic metamorphism | dynamic meteorology |
| dynamic roughness | dynamic thickness | dynamic trough |
| dynamic-height anomaly |
| e layer | earphone | earth |
| earth core | earth crust | earth figure |
| earth hummock | earth interior | earth movements |
| earth oscillations | earth pillar | earth shadow |
| earth zones | earth, composition of crust | earth, shells, composition |
| earth-current storm | earth-layer propagation | earthflow |
| earthquake | earthquake | earthquake zone |
| earth’s crust | east | east point |
| easterly wave | eastern hemisphere | easting |
| ebb current | ebb tide | ebb-and-flow structure |
| ebony | echelon faults | ecnephias |
| ecology | economic effort | economic geography |
| economic geology | economic mineral | ectohumus |
| ecumene | edaphic | edaphic factor |
| eddy correlation | edentates | edge water |
| edge wave | edges | effective atmosphere |
| effective gust velocity | effective porosity | effective precipitable water |
| effective stress | effective terrestrial radiation | effervescence |
| efficacy of fertilizers | efflorescence | effluent stream |
| effusing lava | effusive rocks | effusive stage |
| egnell’s law | eight lings | einkanter |
| ejecta | ekman convergence | ekman layer |
| ekman spiral | ekman transport | el nino |
| elastic rebound theory | elasticity | elaterite |
| electrical conductance | electrical resistivity | electrical sounding |
| electrical storm | electrification, ice nucleus | electrodes |
| electrodynamic drift | electrolytic refining | electromagnetic spectrum |
| electromagnetic waves | electrostatic coalescence | elements |
| elements in earth’s crusts | elephanta | elerwind |
| elevation | elongated shape | elsasser’s radiation chart |
| eluvial placer | eluvial placer deposits | eluvium |
| emanation | embankments | embata |
| embayed | embayed coastal plain | embayed mountain |
| embayment | embouchure | emerald |
| emergence | emery | emigration |
| emissary sky | emplacement | employed population |
| emulsoid | en ecchelon | en ecchelon fault blocks |
| enantimorphous | enclosed sea | end member |
| end moraine | endemic | endglacial moraine |
| endobatholithic | endogene effects | endogenic |
| endogenous deposits | endogenous process | endometamorphism |
| endothermic (adj) | energy coefficient | energy level |
| energy transfer | engrave | engysseosmology |
| enrichment | ensialic geosyncline | enterolithic |
| entrance region | entrapment | entrepot |
| envelope orography | environment | environment of sedimentation |
| environmental lapse rate | eolain | eolation |
| eolian dune | eolian erosion | eolian placer formation |
| eolian ripple mark | eolian sand | eolian soil |
| eolianite | eotvos | epeirogenic |
| epeirogeny | ephemeral gully | ephemeral stream |
| epicanthic fold | epicenter | epiclastic |
| epicontinental | epicontinental sea | epidermis |
| epigene | epigenetic | epimagma |
| epipelagic | epipelagic zone | epiphyte |
| epirogenesis | epithermal | epithermal deposit |
| epizone | epoch | epoch of glaciation |
| equal area net | equator | equatorial air |
| equatorial axis | equatorial bulge | equatorial countercurrent |
| equatorial easterlies | equatorial electrojet | equatorial radius |
| equatorial tide | equatorial trough | equatorial undercurrent |
| equatorial vortex | equatorial wave | equatorial westerlies |
| equidimensional crystal | equidistant projection | equigranular texture |
| equilibrium | equilibrium equation | equilibrium solar tide |
| equilibrium spheroid | equilibrium theory | equilibrium tide |
| equinoctial rains | equinoctial storm | equinoctial tide |
| equinox | equiparte | equiphase zone |
| equipotential line | equivalence | equivalent barotropic model |
| equivalent potential temperature | equivalent temperature | equivalent weight |
| equivalve | era (eon) | eradiation |
| ergograph | eroding velocity | erosion |
| erosion cycle | erosion pavement | erosion surface |
| erosional unconformity | erractices | erratic |
| ertor | eruption | escarpment |
| esker | essential minerals | essexite |
| establishment | estimate | estuary |
| esturaine deposite | esturaine environment | esturaine oceanography |
| etch figure | etesians | ethmolith |
| ethnic group | ethnic structure | ethnology |
| eugeospyncline | euhedral (adj) | eulerian wind |
| euphorbia | euphotic | euphotic zone |
| eustacy | eutectic (adj) | eutectic crystallization |
| eutectic intergrowths | evaporation | evaporation current |
| evaporative power | evaporite | evapotranspiration |
| evergreen forest | evolution | evolve (v) |
| evorsion | excavation | excessive precipitation |
| exchange capacity | exfoliation | exfoliation dome |
| exfoliation joint | exhalation | exhaust trail |
| exhumation | exogene effects | exogenous deposits |
| exogenous process | exorheic | exosphere |
| exothermic solution | expanding electrode method | expansion fissures |
| expedition | expeditionary (adj) | exploration |
| exploration shaft | exploratory survey | explosion |
| explosion crater | explosion tuff | explosive |
| explosive index | exposure | exsolution |
| exsolution lamellae | extended forecast | extended valley |
| extension fracture | extension joints | extensive farming |
| extinct volcano | extinction | extraction |
| extraction of metals and minerals | extraordinary rays | extraordinary wave |
| extratropical cyclone | extravastion | extremes of climate |
| extrusion rock | extrusive igneous rocks | extrusive rock |
| eye coal | eye of the storm | eye of the wind |
| eye wall | eye-colour index |
| f layer | f region | fabric |
| fabric texture | face | face centered cell |
| facet of landscape | faceted pebble | faceted spur |
| facets | facies | facies map |
| facsimile chart | fahlband | fair |
| fair wind | fair-weather cumulus | falkland current |
| fall line | fall line town | fall wind |
| fall-streak hole | fallout winds | false bedding |
| false cirrus cloud | false cleavage | false ice foot |
| false warm sector | family | fan |
| fan fold | fan shooting | fanglomerate |
| farmstead | fastest mile | fathom |
| fault | fault basin | fault block |
| fault breccia | fault coast | fault line |
| fault oil traps | fault plane | fault rock |
| fault scarp | fault separation | fault spring |
| fault strike | fault system | fault terrace |
| fault through | fault throw | fault vein |
| fault wall | fault zone | fault-line scarp |
| fault-trough | fauna | faunizone |
| feather joint | feature | fecal pellets |
| fecundity | feeder beach | feeder current |
| feldspathization | feldspathoid | felsenmeer |
| felsic minerals | felsite | felsitic texture |
| felsophyric texture | felspars | femic minerals |
| fern | ferricrete | ferriferous |
| ferro alloy metals | ferruginous | ferruginous chert |
| ferruginous deposit | fertility | fertility ratio |
| fertilizer minerals | fertilizers | fibratus |
| fibrous | fibula | fido |
| fiducial temperature | field | field bodhis |
| field book | field capacity | field changes |
| field focus | field geology | field lens |
| field pattern | field pressure | field sketching |
| field study | figure | figure of the earth |
| filamentous texture | filler | filling |
| filter pressing | filter sand | filters |
| final setting | fine admixture | fine aggregate |
| fine earth | fine gravel | fine sand |
| finite difference method | finite element method | fins |
| fire and water proofing texture | fire clays | fire opal |
| fire proof | fire refining of metals | fire weather |
| fire works | fireclay | firing |
| firn line | first bottom | first gust |
| first order prism | first-order climatological station | first-order relief |
| first-order station | fissile | fission reaction |
| fission-track dating | fissure eruption | fissure spring |
| fissure system | fissure vein | fissures |
| fitness figure | fittings | five-day forecast |
| fixed carbon | fjord valley | flagstone |
| flake | flamboyant structure | flame test |
| flan | flaps | flaser |
| flaser structure | flash figures | flask |
| flat | flat country | flaw |
| flax seed ore | flexible sandstone | flexural slip |
| flight forecast | flight visibility | flint |
| flint clay | flist | float coal |
| float mineral | float ore | floating ice |
| floe | floe till | floeberg |
| flood | flood basin | flood current |
| flood discharge | flood frequency | flood tide |
| flooding method | floodplain | floodplain splay |
| flora | florida current | flotation |
| flour gold | flow banding | flow breccia |
| flow cleavage | flow fold | flow line map |
| flow net | flow sheet | flow slide |
| flow structure | flow tide | flow velocity |
| flowage line | flowing well | flowstone |
| fluctuation | fluid conductivity | fluid geometry |
| fluid potential | fluid saturation | fluidal texture |
| flume | fluorescence | fluoridation |
| flurry | flute cast | fluvial |
| fluvial deposit | fluvial sand | fluvial soil |
| fluviatile | fluviological deposits | flux |
| fluxes and particles | foam line | foam mark |
| focal length | focal point | focus |
| focusing knobs | focusing screw | foehn |
| foehn cloud | foehn cyclone | foehn island |
| foehn period | foehn phase | foehn storm |
| foehn trough | foehn wall | fog |
| fog bound | fog bow | fog deposit |
| fog detactor light | fog dispersal | fog drip |
| fog drop | fog gong | fog horizon |
| fog horn | fog scale | fog signal |
| fog trach | fog wind | fogbank |
| fold system | folds | foliation |
| following wind | food gathering economy | foothills |
| footwall | force land | force shore |
| forced migration | forced wave | fore shock |
| fore sight | forebulge | forecast |
| forecast period | forecast verification | forecast-reversal test |
| foredeep | foredune | forel scale |
| forerunner | foreshore | forest wind |
| forked lightning | form line | formation |
| formation factor | formation level | formation resistivity |
| forms of igneous rocks | forrel cell | fortnightly tide |
| forty saints’ storm | fossil | fossil dune |
| fossil fuel | fossil reef | fossil resin |
| fossil turbulence | foundation coefficient | founder |
| founder breccia | founder sand | foundry facing |
| four-way dip | fowan | fracture cleavage |
| fracture forms of igneous rocks | fracture machanics | fracture plane |
| fracture spring | fracture zone | fracture-plane inclination |
| fractus | fragile specimen | fragipan |
| fragmentation nucleus | fragmented shape | fragments |
| free aquifer | free atmosphere | free face |
| free waves | free-air gravity anomaly | free-air temperature |
| freezing level | freezing nucleus | freezing precipitation |
| freezing-level chart | frequency | frequency distribution of igneous rocks |
| frequency graph | fresh | fresh breeze |
| fresh gale | fresh water | freshet |
| friable | friagem | friction crack |
| friction depth | frictional force | fringe joint |
| fringe ore | fringe region | fringing reef |
| front | frontal contour | frontal cyclone |
| frontal fog | frontal inversion | frontal lifting |
| frontal precipitation | frontal profile | frontal system |
| frontal thunderstorm | frontal wave | frontal zone |
| frontier | frost | frost action |
| frost boil | frost day | frost hazard |
| frost heaving | frost hollow | frost line |
| frost mound | frost pocket | frost point |
| frost smoke | frost table | frost thrusting |
| frost weathering | frost wedging | frostless zone |
| frozen ground | frozen precipitation | fucoid |
| fuel | fulgural | fulgurite |
| fuliginous | full moon | fuller’s earth |
| fully developed sea | fumarole | fumaroles |
| fumulus | functional analysis | fundamental strength |
| funnel cloud | furiani | furnace |
| furrow | fusain | fused alumina |
| fusible (adj) | fusinization | fusion crust |
| gabbro | gaign | galaxy (star cluster) |
| gale | gale warning | galerne |
| gallego | gallery | galofaro |
| galssy | galvanizing | gamma ray logging |
| gamma rays | gangue | gangue minerals |
| garbin | garlicky | garnet |
| gas cap | gas column | gas floor |
| gas pocket | gas reservoir | gas sand |
| gas spurt | gas vein | gas zone |
| gas-condensate reservoir | gas-filled porosity | gaseous emanations |
| gaseous transfer | gases | geg |
| geiger muller counter | gel | gelatinous |
| gelifluction | gem | gemology |
| gemstone | gene | genera |
| generalization | generalized contour | generalized hydrostatic equation |
| generalized transmission function | genesis | genesis rocks |
| genetic facies | genetic transformation | genetic twinning |
| genetic variation | genoa cyclone | gentle breeze |
| genus | geo | geobotanical prospecting |
| geocentric vertical | geochemical anomaly | geochemical balance |
| geochemical cycle | geochemical evolution | geochemical prospecting |
| geochemistry | geochronology | geochronometry |
| geocorona | geocosmogony | geocratic |
| geodesic | geodesist | geodesy |
| geodetic astronomy | geodetic coordinates | geodetic datum |
| geodetic equator | geodetic gravimetry | geodetic latitude |
| geodetic line | geodetic longitude | geodetic meridian |
| geodetic parallel | geodetic position | geodetic precession |
| geodetic survey | geodynamics | geoeconomy |
| geognosy | geographic north | geographic range |
| geographic vertical | geographical coordinates | geographical cycle |
| geographical distance | geography | geoid |
| geoisotherm | geologic age | geologic column |
| geologic control | geologic log | geologic map |
| geologic noise | geologic province | geologic section |
| geologic structure | geologic thermometers | geologic time |
| geologic time scale | geological ephocs | geological hammer |
| geological map | geological oceanography | geological parties |
| geological satchel | geological structures | geological survey |
| geologist | geology | geomagnetic coordinates |
| geomagnetic cutoff | geomagnetic dipole | geomagnetic equator |
| geomagnetic field | geomagnetic field reversal | geomagnetic latitude |
| geomagnetic longitude | geomagnetic meridian | geomagnetic pole |
| geomagnetic reversal | geomagnetic storm | geomagnetic variation |
| geomagnetism | geometrical dip | geometrical horizon |
| geomorphic control | geomorphic cycle | geomorphology |
| geophone | geophysical exploration | geophysical logging |
| geophysical prospecting | geophysicist | geophysics |
| geopotential height | geopotential number | geopotential surface |
| geopotential thickness | geopotential topography | geopotential unit |
| geopressure | geopressurized geothermal system | geosere |
| geosophy | geosphere | geostatistics |
| geostrophic | geostrophic approximation | geostrophic assumption |
| geostrophic current | geostrophic departure | geostrophic deviation |
| geostrophic distance | geostrophic equation | geostrophic equilibrium |
| geostrophic flow | geostrophic flux | geostrophic vorticity |
| geostrophic wind | geostrophic-wind level | geostrophic-wind scale |
| geosynclinal facies | geosyncline | geotectic |
| geothermal | geothermal anomaly | geothermal energy |
| geothermal gradient | geothermal system | geothermometry |
| germanium | gestalt | geyser |
| geyserite | gharbi | giant’s kettle |
| gill | gill-bar | glacial |
| glacial abrasion | glacial accretion | glacial advance |
| glacial anticyclone | glacial boulder | glacial chronology |
| glacial deposit | glacial drift | glacial epoch |
| glacial erosion | glacial geology | glacial lake |
| glacial maximum | glacial retreat | glacial scour |
| glacial striae | glacial trough | glaciated terrain |
| glaciation | glaciation limit | glacier |
| glacier table | glacier wind | glacing |
| glaciofluvial | glaciolacustrine | glaciology |
| glacon | glance pitch | glass sands |
| glass wool | glassy | glaves |
| glessite | gley | glittering |
| global radiation | global sea | globigerina ooze |
| globular projection | globulite | glomeroporphyritic structure |
| gloom | gloup | gobi |
| gold | gold deposits | gold placers |
| goldschmidt’s mineralogical phase rule | golfada | gondwanaland |
| goniometer | gorge | gosling blast |
| gossan | gouge | graben |
| graben faults | grabs | gradation |
| gradation period | grade scale | graded |
| graded bedding | gradient | gradient current |
| gradient flow | gradient method | gradient wind |
| grading | grain size | grains |
| granite | granite series | granite wash |
| granite, decomposition of | granitic batholith | granitoid masses |
| granodiorite | granophyre | granophyric texture |
| granularity | granule | granulite |
| granulose structure | grapestone | graphic texture |
| graphical scale | graphite | graptolite |
| graptolite shale | grass temperature | grassland |
| gratitude | gravel | gravel bank |
| gravimeter | gravimetric geodesy | gravitational force |
| gravitational setting | gravitational sliding | gravitational tide |
| gravity | gravity anomaly | gravity concentration |
| gravity current | gravity drainage reservoir | gravity map |
| gravity meter | gravity slope | gravity survey |
| gravity tide | gravity well | gravity wind |
| greasy lustre | great circle | great diurnal range |
| great tropic range | great-circle direction | great-circle distance |
| greater flood | greco | green mud |
| green sky | greenhouse effect | greenland anticyclone |
| greenockite | greensand | greenstone belts |
| greenwich mean time | greenwich meridian | gregale |
| grey colour | grid north | grike |
| grinding pebbles | grindstone | grit |
| groove | groove casts | gross reproduction rate |
| gross-austausch | grottoes | ground fog |
| ground frost | ground ice mound | ground mass |
| ground moraine | ground pressure | ground streamer |
| ground swell | ground truth measurements | ground visibility |
| ground water | ground water deposition of salts | ground-to-cloud discharge |
| groundwater basin | groundwater flow | groundwater legislation |
| groundwater levels | groundwater management | groundwater model |
| groundwater pollution | groundwater province | groundwater quality |
| groundwater recharge | groundwater storage | group |
| group number | grouting | growl |
| growth lattice | growth of population | gruss |
| guano | guba | guiana current |
| guide | guide fossil | guide lines |
| guinea current | gulch | gulf |
| gulf stream | gulf stream counter current | gulf stream eddy |
| gulf stream front | gully | gully erosion |
| gully squall | gumbotil | gunz |
| gunz-mindel | gust | gustiness |
| gustiness components | gustiness factor | guttra |
| guxen | guyot | guzzle |
| gypsum | gyre | gyttja |
| haanel depth rule | haar | habit |
| habitat | haboob | hachures |
| hachuring | hackly fracture | hadal (adj) |
| hadal zone | hade (dip) | hadley cell |
| haff | hail | hail stage |
| hailstone | hailstorm | hair colour |
| hair texture | halcyon days | half tide |
| half-arc angle | half-life period | halmeic |
| halmyrolysis | halo | halocline |
| haloes of dispersion | halomorphic | hanger |
| hanging | hanging glacier | hanging valley |
| hanging wall | harbor | harbor reach |
| hard rock | hardness | harmonic folding |
| harmonic prediction | hartite | haster |
| haud | hauynphonolote | haze |
| haze droplet | haze factor | haze horizon |
| haze layer | haze line | head of water |
| head-shield | headland | headwall |
| headward erosion | heart land | hearth |
| hearting | heat and sound insulators | heat balance |
| heat budget | heat equator | heat flow province |
| heat lightning | heat storage | heat thunderstorm |
| heating island effect | heave | heavy floe |
| heavy mineral | height of collimation method | height of hydraulic jump |
| height of tide | height pattern | height-change chart |
| height-change line | heliograph | heliosphere |
| heliotropic wind | helluhraun | helmert’s formula |
| hemicrystalline | hemimorphic class | hemimorphism |
| hemipelagic region | hemipelagic sediment | hemisphere |
| herbaceous plants | herbivorous (adj) | heterogeneous |
| heterogeneous reservoir | heteromorphism | heterophere |
| hex octahedron | hex tetrahedron | hexaclahedral class |
| hexad | hexagonal columnar joint | hexagonal division |
| hexagonal platelet | hexagonal symmetry | hexagonal system |
| hexagonal trapezohedron | hexahedrite | hexavalent |
| hibernal | hieroglyph | high |
| high altitude station | high energy environment | high flood level |
| high foehn | high fog | high grade |
| high index | high latitudes | high level thunderstorm |
| high quartz | high tide | high water |
| high water inequality | high water line | high water lunitidal interval |
| high-angle fault | high-rank coal | high-volatile bituminous coal |
| high-water full and change | high-water stand | higher high water |
| higher low water | highland | highplain |
| hill | hill creep | hill road |
| hill shading | hillock | hillside area |
| hilt’s law | hinge fault | hinge line |
| hinterland | histogram | historical geology |
| histosol | hitch | hoarfrost |
| hogback | hogging bending moment | holocrystalline |
| holohedral | holohedral class | holohyaline |
| homeomorphy | homoclimes | homocline |
| homogencity | homogeneous atmosphere | homogenized |
| homogenous | homologous | homolographical projection |
| homologue | homopause | homosiesmal line |
| homosphere | honeycomb formation | hook |
| horizon | horizon distance | horizontal angles |
| horizontal gallery | horizontal intensity | horizontal pressure force |
| horizontal striations | hornstone | horse |
| horse latitudes | horseback | horsetail ore |
| horst | horst faults | host rock |
| hot spring | hot wind | hot – wet lands |
| huangho deposit | hubbard glacier | hue |
| human ecology | human geography | human settlement |
| humerus | humic | humic coal |
| humid | humidity | humidity coefficient |
| humidity mixing ratio | humification | hummock |
| hummocked ice | hummocky | humod |
| humult | humus | hurricane |
| hurricane monitoring buoy | hurricane warning | hurricane watch |
| hurricane wave | hurricane wind | hurricane-force wind |
| hyacinth | hyaloclastite | hybridization |
| hybridrocks | hydatogenesis | hydraulic cements |
| hydraulic current | hydraulic head | hydraulic ratio |
| hydraulic rotary drilling | hydraulicking | hydro geological map |
| hydrocarbon | hydrocast | hydrogeochemistry |
| hydrogeology | hydrographic cruise | hydrographic survey |
| hydrographic table | hydrography | hydrolaccolith |
| hydrologic equation | hydrologic sequence | hydrological cycle |
| hydrology | hydrolysis | hydrolyzate |
| hydrometamorphism | hydrometer | hydrometerology |
| hydromica | hydromorphic | hydrosphere |
| hydrostatic approximation | hydrostatic assumptions | hydrothermal |
| hydrothermal alteration | hydrothermal deposit | hydrothermal mineralization |
| hydrothermal pressure | hydrothermal processes | hydrothermal solution |
| hydrothermal synthesis | hyetology | hygology |
| hygrokinematics | hygrometer | hylaopilitic texture |
| hypabyssal rocks | hyperacoustic zone | hypersaline |
| hypidiomorphic texture | hypocenter | hypocrystalline |
| hypogene | hypogene ore minerals | hypogene zone |
| hypomagma | hypometer | hypothermal |
| hypothermal deposits | hypothesis | hypsographic curve |
| hypsography | hypsometric formula |
| i-type magma | ibe wind | ice |
| ice age | ice bay | ice belt |
| ice blink | ice bridge | ice cave |
| ice concentration | ice crystal | ice crystal cloud |
| ice crystal haze | ice erosion | ice field |
| ice fog | ice foot | ice island |
| ice nucleus | ice pellets | ice pole |
| ice push | ice rafting | ice shelf |
| ice storm | ice-contact delta | ice-island iceberg |
| iceberg | icelandic low | ichnofacies |
| ichnor | icing level | ifr terminal minimums |
| igneous meteor | illumination climate | illuvial |
| illuviation | illuvium | imbricate structure |
| imbrication | impact crater | impactite |
| imperfection | imperious | impervious |
| impervious bed | impervious, (impermeable) | impregnation |
| impression | impsonite | inactive front |
| incandescent bulbs | inceptisol | incised meander |
| inclination | inclined bedding | inclined contact |
| inclusions | incoherent | incompetent |
| incompetent bed | incompetent rock | incongruous |
| incrustations | indefinite celling | index cycle |
| index fossil | index mineral | index plane |
| indian ocean | indian spring low water | indicated air temperature |
| indirect cell | induction method | induration |
| industrial diamond | industrial geography | industrial jewel |
| industrial meteorology | industrial raw materials | industrial uses |
| inertia | inertia current | inertia period |
| inertial circle | inertial flow | inertial theory |
| inertinte | infancy | infiltrates |
| infiltration vein | infralateral tangent arcs | infrared window |
| infusorial earth | ingot | ingrown meander |
| initial landform | inland | inland sea |
| inland water | inlier | inner core |
| inner harbor | inorganic | inosilicate |
| inselberg | inshore | inshore current |
| inshore zone | insoluble residue | instrument weather |
| instrumented buoy | interbedded | intercalation |
| intercardinal point | intercontinental sea | interference ripple mark |
| interfluve | intergrowth | intermediate igneous rock |
| intermediate ion | intermediate moraine | intermontane |
| intermontane glacier | intermontane trough | internal drift current |
| internal erosion | internal sedimentation | international analysis code |
| international ellipsoid of reference | international geophysical year | international gravity formula |
| international ice patrol | international index number | international nature protection union (inpu) |
| international polar year | international synoptic code | intersitial |
| interspread | interstice | interstratal water |
| intertidal zone | intertropical convergence zone | intertropical front |
| interurban | intraclast | intraformational conglomerate |
| intraformational fold | intrazonal soil | intrusion |
| intrusive rock | intumescent | invasion |
| inverna | inversion layer | ion cloud |
| ion column | ionic ratio | ionized layers |
| ionosphere | ionospheric D scatter meteor burst | ionospheric disturbance |
| ionospheric storm | iridescence | iridescent cloud |
| irish sea | irminger current | iron formation |
| iron hats | iron ore | iron winds |
| ironshot | irradiation | irregular crystal |
| irregular masses | irrotational strain | isallobar |
| isallobaric | isallobaric wind | isallohypsic wind |
| isallotherm | isanabat | isanakatabar |
| isanomalous line | isentropic chart | isentropic map |
| isentropic mixing | isentropic surface | isentropic thickness chart |
| isentropic weight chart | island | island arc |
| isobar | isobaric divergence | isobaric map |
| isobaric surface | isobaric vorticity | isobath |
| isobathytherm | isobront | isocarb |
| isoceraunic | isoceraunic line | isoclinal chart |
| isocline | isoclinic line | isocracy theory |
| isodynamic line | isogal | isogam |
| isogonic line | isograd | isogradient |
| isohaline | isohel | isohume |
| isolith map | isomagnetic | isomer |
| isomorphic mineral | isoneph | isopach map |
| isopachous line | isopiestic level | isopiestic line |
| isopluvial | isopycnic | isopycnic level |
| isoseigmal | isoshear | isostatic anomaly |
| isostatic compensation | isotach | isotach chart |
| isotherm | isotherm ribbon | isothermal atmosphere |
| isothermal chart | isothermal equilibrium | isothermal layer |
| isothermal remanent magnetization | isothermobath | isotimic |
| isotimic line | isotimic surface | isotope |
| isotropic | isotropy | itabirite |
| j function | jade | jauk |
| jet coal | jet streak | jet-effect wind |
| jigging | jigs | joint |
| joint block | joint plane | joint set |
| joint system | joint vein | junction streamer |
| junk wind | junta | juran |
| jurassic |
| k-a age | kaavie | kachchan |
| kal baisakhi | kalema | kame terrace |
| kames | kankar | kaolin |
| kaolinite | kaolinization | kar |
| karaburan | karajol | karema |
| karize | karren | karst |
| karst base level | karst plain | karst topography |
| karst window | katafront | katazone |
| katomorphic zone | kaus | keewatin |
| kelsher | kelvin wave | kerogen |
| kettle | key bed | khadar |
| kidney shaped | kimberley reefs | kingdom |
| kink band | kite observation | klint |
| klintite | klippe | knickpoint |
| knik wind | knoll | knudsen’s tables |
| kona cyclone | koppen-supan line | kossava |
| kragtogen | kukersite | kuroshio countercurrent |
| kuroshio current | kuroshio extension | kuroshio system |
| kyrohydratic point |
| labbe | laboratory | labour consuming operations |
| labrador current | laccolith | lacunosus |
| lacustrine | lacustrine sediments | lacustrine soil |
| lag deposit | lag fault | lag gravel |
| laggards | lagoon | lagrangian current measurement |
| lahar | lake breeze | lake effect |
| lake effect storm | lake peat | lake plain |
| lakes | lambing storm | lamellar |
| lamellar structure | lamination | land and sea breeze |
| land breeze | land bridge | land hemisphere |
| land mark | land pebble phosphate | land sky |
| landblink | landform | landlocked |
| landmark | landscape | landslide |
| landslide track | lansan | lapilli |
| lapse line | lapse rate | large nuclei |
| large scale convection | latent instability | lateral accretion |
| lateral erosion | lateral fault | lateral moraine |
| lateral planation | lateral secretion | laterite |
| lateritic soil | laterizaion | lathlike |
| latitude | latitude effect | latitude variation |
| laurentian shield | lava | lava blisters |
| lava cone | lava field | lava flow |
| lava fountain | lava lake | lava plateau |
| lava sheet | lava tube | law of storms |
| law of superposition | layer | layer depth |
| layer depth effect | layer of no motion | layered complex |
| lead | leader stroke | leaf mold |
| leakage halo | leaking mode | lee dune |
| leeward tidal current | left bank | left lateral fault |
| leneococratic | lens | lenticle |
| lenticular body | lenticularis | lentil |
| leptogeosyncline | lesser ebb | lesser flood |
| leste | leveche | level of free convection |
| level of nondivergence | libby effect | lichenometry |
| liesegang banding | life spring | lifting condensation level |
| ligament | light mineral | lightning |
| lightning channel | lightning discharge | lightning flash |
| lightning stroke | lignite | limano |
| limb | limit of the atmosphere | line blow |
| line of strike | lineament | linear cleavage |
| lineation | lingula | linguoid ripple mark |
| linke scale | lipper | liquefaction |
| liquid limit | liquid limit | liquid oxygen |
| liquid phase | liquid-dominated hydrothermal reservoir | liquid-filled porosity |
| lithic | lithic tuff | lithification |
| lithoclase | lithofacies | lithofacies map |
| lithogeochemical survey | lithographic limestone | lithographic texture |
| lithologic map | lithology | lithometeor |
| lithomorphic (adj) | lithophysa | lithosol |
| lithosphere | lithostratigraphy | lithotope |
| lithotype | little brother | littoral current |
| littoral deposit | littoral drift | littoral sediments |
| littoral transport | littoral zone | llano |
| llebetjado | load cast | loam |
| loaming | local angular momentum | local change |
| local extra observation | local forecast | local magnetic disturbance |
| local peat | local relief | local storm |
| local winds | localisation | locality |
| lode | lodos | lodranite |
| loess | loess kindchen | logarithmic velocity profile |
| lolly ice | lombarde | long-period tide |
| long-range forecast | longitude | longitudinal dune |
| longitudinal fault | longitudinal striation | longshore bar |
| longshore trough | loo | loom |
| loose clastic materials | loose sediments | lopolith |
| low quartz | low water | low-angle fault |
| low-energy environment | low-moor bog | low-moor peat |
| low-rank metamorphism | low-tide terrace | low-velocity layer |
| low-volatile coal | low-water inequality | low-water lunitidal interval |
| lower atmosphere | lower high water | lower low water |
| lower mantle | lubricant | luganot |
| luminescence | luminoscope | luminous meteor |
| lump of ore | lunar atmospheric tide | lunar tide |
| lunate bar | lunette | lunisolar tides |
| lunitidal interval | luster | luster mottlings |
| lutaceous | lutecite | lutite |
| lysocline |
| maar | maceral | maceration |
| mackerel sky | macky effect | macrofacies |
| macrometeorology | maelstrom | maestro |
| magma chamber | magma geothermal system | magmatic rocks |
| magmatic stoping | magnetic annual change | magnetic annual variation |
| magnetic bay | magnetic direction | magnetic diurnal variation |
| magnetic equator | magnetic latitude | magnetic local anomaly |
| magnetic meridian | magnetic minerals | magnetic north |
| magnetic observatory | magnetic prime vertical | magnetic profile |
| magnetic reversal | magnetic secular change | magnetic segregation |
| magnetic station | magnetic storm | magnetic survey |
| magnetic variation | magnetic wind direction | magnetoionic duct |
| magnetoionic theory | magnetoionic wave component | magnetopause |
| magnetosheath | magnetosphere | magnetospheric plasma |
| magnetospheric substorm | magnetostratigraphy | magnetotail |
| mainland | major fold | major trough |
| malleable (adj) | mandatory layer | mandatory level |
| manganese nodule | mantle of soil | manto |
| map plotting | marble | march |
| margarite | margin | marginal fissure |
| marginal plateau | marginal salt pan | marginal sea |
| marginal thrust | marginal zones | marigram |
| marine | marine abrasion | marine borer |
| marine deposits | marine erosion | marine forecast |
| marine meteorology | marine salina | marine snow |
| marine swamp | marine terrace | marine transgression |
| marine weather observation | marine-cut terrace | maritime air |
| maritime polar air | maritime tropical air | marker bed |
| marl | marly | marmor |
| marsden chart | marsh | marsh gas |
| mascon | mass attraction vertical | mass erosion |
| mass extinction | mass heaving | mass movement |
| masses | massif | massive |
| massive asphalt | master joint | matanuska wind |
| material unit | mathematical geography | mathematical geology |
| matinal | matric forces | matrix porosity |
| matrix velocity | matureland | maturity index |
| maximum ebb | maximum flood | maximum zonal westerlies |
| maximum-wind and shear chart | maximum-wind level | maximum-wind topography |
| mean chart | mean diurnal high-water inequality | mean diurnal low-water inequality |
| mean high water | mean high-water lunitidal interval | mean high-water neaps |
| mean high-water springs | mean latitude | mean low water |
| mean low-water neaps | mean low-water springs | mean lower low water |
| mean neap rise | mean range | mean rise interval |
| mean rise of tide | mean sea level | mean spring rise |
| mean temperature | mean tide level | mean water level |
| meander | meander belt | meander core |
| meander niche | meander scar | meander spur |
| mechanical destruction | mechanical turbulence | mechanical weathering |
| mechanics | medial moraine | median mass |
| median particle diameter | mediterranean sea | medium |
| medium-range forecast | megaripple | megatectonics |
| melanesia | melange | melanocratic |
| melonitisation | melting level | melting point |
| membrane | mendip | mercalli scale |
| merian’s formula | meridian | meridional |
| meridional cell | meridional circulation | meridional flow |
| meridional front | meridional index | meridional wind |
| mesa | mesa plain | mesa-butte |
| mesobenthos | mesocyclone | mesogeosyncline |
| mesometeorology | mesopause | mesopeak |
| mesosiderite | mesosphere | mesostasis |
| mesotherm | mesothermal (adj) | mesotil |
| mesozoic (adj) | metal | metal scoop |
| metallic lustre | metallogenic province | metallurgy |
| metamorphic rock | metamorphic rock reservoir | metaripple |
| meteoric spring | meteorite | meteorite crater |
| meteorological | meteorological chart | meteorological data |
| meteorological equator | meteorological minima | meteorological radar |
| meteorological range | meteorological solenoid | meteorological tide |
| micaceous | microamperemeter | microbarm |
| microbarograph | microbreccia | microburst |
| microearthquake | microgeography | microlayer |
| micrometeorology | micron | micropulsation |
| microrelief | microscope | microseism |
| mid-atlantic ridge | mid-extreme tide | mid-oceanic ridge |
| middle clouds | midfan | midline |
| migma | migratory | milky quartz |
| milky white quartz | millstone | mima mound |
| minable | mineral | mineral constituents |
| mineral deposit | mineral earth | mineral forms |
| mineral hardness | mineral resources | mineral soil |
| mineral spring | mineralising agent | mineralization |
| mineralizer | mineralogenetic epoch | mineralogenetic province |
| mineralogical phase rule | mineralogist | mineralogy |
| minimum ebb | minimum flood | mining |
| minor trough | minus correction | minus-cement porosity |
| mire | mist droplet | mistral |
| mitosis | mitotic (adj) | mixed cloud |
| mixed current | mixed layer | mixed nucleus |
| mixed ore | mixed tide | mixed-layer mineral |
| mixing ratio | moat | mobile belt |
| mobilization | mock fog | mode eddies |
| model atmosphere | moderate breeze | moderate gale |
| moderator | modified index of refraction | mofette |
| mohole drilling | mohorovicic discontinuity | mohs scale |
| moist air | moist ended | moisture adjustment |
| moisture factor | moisture inversion | moles |
| mollisol | molysite | monadnock |
| monarock | monocline | monoclinic system |
| monogeosyncline | monomineralic rock | monotron |
| monsoon | monsoon current | monsoon fog |
| monsoon low | moon pillar | moonstone |
| moor coal | moraine | moraine bar |
| moraine kame | moraine lower | moraine plateau |
| morphogenetic region | morphologic variation | morphology |
| moss | moss agate | mother lode |
| mottled | motu | mound |
| mound break waters | mountain | mountain and valley winds |
| mountain areas | mountain breeze | mountain brown ore |
| mountain building | mountain chain | mountain cork |
| mountain gap wind | mountain meteorology | mountain pediment |
| mountain range | mountain slope | mountain system |
| mountain wave | mountain wood | mozambique current |
| mud bail | mud cone | mud crack |
| mud flat | mud jack | mud mortor |
| mud polygon | mud pot | mud volcano |
| mud wave | mudflow | mudlump |
| mudslide | mudstone | muggy |
| multicycle | multiple reflection | multiple-current hypothesis |
| murum | mustard-seed coal |
| nacreous clouds | nailhead striation | naked karst |
| nakhlite | nansen cast | nappe |
| narbonnais | narrow | narrows |
| nathansohn’s theory | national meridian | native asphalt |
| native element | native metal | native uranium |
| natric horizon | natural arch | natural bitumen |
| natural bridge | natural coke | natural glass |
| natural harbor | natural levee | natural tunnel |
| natural well | navajo sandstone | naval meteorology |
| navigable semicircle | navigation | neap range |
| neap rise | neap tidal current | neap tide |
| nearshore | nearshore circulation | nebraskan drift |
| nebraskan glaciation | nebula | nebulosus |
| neck | neck cutoff | needle |
| needle coal | needle ore | negative area |
| negative element | negative landform | negative movement |
| negative rain | nematath | nemere |
| neoautochthon | neocryst | neogenesis |
| neoglaciation | neomagma | neomineralization |
| neosome | neostratotype | neotectonic map |
| neotectonics | nephanalysis | nephcurve |
| nepheloid zone | nephology | neptunian dike |
| neptunic rock | neptunism | neritic |
| nested | net slip | network veinlets |
| neutral estuary | neutral shoreline | neutron |
| neutrosphere | nevada | neve |
| neve basin | new global tectonics | new red sandstone |
| new snow | nieve penitente | night wind |
| nightglow | nimbostratus | nimbus |
| nip | nitrogen balance | nival surface |
| nivation | nivation hollow | niveal |
| niveoglacial | niveolian | noble metal |
| noctilucent cloud | nodal zone | node |
| nodular chert | nodule | nominal diameter |
| nonbanded coal | noncaking coal | noncalcic brown soil |
| noncapillary porosity | nonclastic | nonconformity |
| nonconservative element | noncyclic terrace | nondivergent flow |
| nonferrous | nongraded | nonpenetrative |
| nonplunging fold | nonsorted polygon | nonsystematic joint |
| nontidal current | nonwetting sand | normal |
| normal aeration | normal chart | normal consolidation |
| normal cycle | normal dispersion | normal erosion |
| normal fault | normal moveout | normal polarity |
| normal ripple mark | normal soil | normal synclinorium |
| normal water | norte | north |
| north america | north american high | north atlantic current |
| north cape current | north equatorial current | north foehn |
| north frigid zone | north pacific current | north-south effect |
| northeast drift current | northeast storm | northeast trade wind |
| northeaster | norther | northern hemisphere |
| northwester | norway current | nose |
| notch | nourishment | novaculite |
| novaculitic chert | nowcasting | noxious gases |
| nubbin | nuclear fuel | nuclear reaction product |
| nuclear refractories | nuclear winter | nucleated settlement |
| nuclei | nuee ardente | nuggets (gold) |
| numerical forecasting | nunatak | n’aschi |
| oasis | oberwind | oblique fault/slip fault |
| obscuration | obsequent | obsequent fault-line scarp |
| obsequent stream | observation plot | observation well |
| observational day | obsidian | obstructed crest |
| obstructed stream | obstruction moraine | obstruction to vision |
| occluded cyclone | occluded front | occult mineral |
| occurrence | ocean | ocean basin |
| ocean circulation | ocean current | ocean floor |
| ocean weather station | oceanic crust | oceanic heat flow |
| oceanic island | oceanic province | oceanic rise |
| oceanic zone | oceanization | oceanographic model |
| oceanographic station | oceanographic survey | oceanography |
| ochre | ochreous | octahedral coordination |
| octahedrite | off-reef facies | offlap |
| offset | offset deposit | offshore |
| offshore bar | offshore current | offshore slope |
| offshore terrace | offshore water | offshore wind (land breeze) |
| oil | oil bound distemper | oil column |
| oil floor | oil pool | oil rock |
| oil sand | oil seed | oil seep |
| oil shale | oil trap | oil tube |
| oil zone | oil-filled pump | oil-water surface |
| old age | old ice | old lake |
| old mountain | old red sandstone | old wives’ summer |
| old working | oldland | olibarnum oil |
| oligopelic | olivine-bronzite chondrite | oncolite |
| one-year ice | onionskin weathering | onshore |
| onshore wind | oolites | ooze |
| opacus | opalescence | opaque attritus |
| opaque sky cover | open bay | open coast |
| open ditch | open fault | open fold |
| open harbor | open head | open hearth process |
| open ice | open impeller | open pack ice |
| open rock | open sand | open sea |
| open workings | open-space structure | opening |
| operational unit | operational weather limits | ophitic |
| opposing impeller | opposing wind | opposite tide |
| optical air mass | optical calcite | optical horizon |
| optical oceanography | optical thickness | optimum moisture content |
| optimum speed | optimum temperature | ora |
| orbicule | orbital current | order |
| ordinary tides | ordinary-wave component | ordinate mid |
| ore | ore bed | ore body |
| ore cluster | ore control | ore deposit |
| ore district | ore dressing | ore lodes |
| ore microscopy | ore mineral | ore shoot |
| ore-lead age | orebody | oregenesis |
| orepocket | organic | organic fuel |
| organic geochemistry | organic matter | organic reef |
| organic soil | organic texture | organic weathering |
| organolite | orientation diagram | oriented |
| oriented map | original valley | ornamental stone |
| ornamentation | orocline | orogenesis |
| orogenic belt | orogenic cycle | orogenic forces |
| orogenic sediment | orogenic unconformity | orogeny |
| orogeosyncline | orographic cloud | orographic lifting |
| orographic occlusion | orographic precipitation | orography |
| orotath | orpiment | orsified |
| orteology | orthochem | orthochromatic |
| orthoconglomerate | orthogenesis | orthogeosyncline |
| orthohydrous coal | orthomimic feldspars | orthophotograph |
| orthoquartzitic conglomerate | orthotill | oscillation ripple mark |
| osos wind | ostria | ouari |
| outburst | outcrop | outcrop map |
| outer atmosphere | outer bar | outer beach |
| outer harbor | outflow cave | outlet conduit |
| outlier | outwash | outwash cone |
| outwash fan | outwash plain | outwash terrace |
| outwash train | ovendry weight | over chute |
| overbank deposit | overburden | overcast |
| overconsolidation | overfalls | overfold |
| overlap fault | overlying | overprint |
| overrunning | overseeding | oversteepening |
| overthrust | overthrust nappe | overtide |
| overturned | overwash | overwash mark |
| overwash pool | oxbow | oxbow lake |
| oxidate | oxidized zone | oxygen deficit |
| oxygen distribution | oxygen isotope fractionation | oyashio |
| ozocerite | ozone cloud | ozonesonde |
| ozonosphere |
| pacific high | pacific north equatorial current | pacific ocean |
| pacific south equatorial current | pacing | pack ice |
| packing proximity | paesa | pagoda stone |
| paha | pahoehoe | paint pot |
| painter | palaenotology | palagonite |
| palasite | palate | paleic surface |
| paleobotanic province | paleoceanography | paleochannel |
| paleoclimate | paleoclimatic sequence | paleoclimatology |
| paleocurrent | paleoequator | paleofluminology |
| paleogeography | paleogeologic map | paleogeology |
| paleogeomorphology | paleohydrology | paleoisotherm |
| paleokarst | paleolatitude | paleolimnology |
| paleolithologic map | paleomagnetic stratigraphy | paleomagnetics |
| paleopedology | paleoplain | paleopole |
| paleosalinity | paleoslope | paleosol |
| paleosome | paleostructure | paleotectonic map |
| paleotemperature | paleothermal | paleothermometry |
| paleotopography | paleozoic | palevent |
| palingensis | palisades | pallasite |
| palouser | pan coefficient | pancake ice |
| panidiomorphic rock | panning | panplain |
| panplanation | papagayo | paper coal |
| paper shale | paper spar | parabituminous coal |
| parabolic dune | parachronology | paraclinal |
| paraconformity | paraconglomerate | paraffin coal |
| paraffin dirt | paragenesis | paragenetic mineralogy |
| paraglomerate | paragneiss | paraliageosyncline |
| paralic | paralic coal basin | parallax inequality |
| parallel ripple mark | parallel roads | pararipple |
| paratill | parcel method | parent material |
| parent rock | parental magma | partial obscuration |
| partial pediment | partial pluton | partial potential temperature |
| partial thermoremanent magnetization | partial-duration series | particle diameter |
| particle size | parting | parting cast |
| parting lineation | parting plane lineation | parting step lineation |
| partiversal | partly cloudy | pass |
| passage | passage bed | passive fold |
| passive margin | patch reef | patina |
| pattern | patterned ground | pea gravel |
| pea-soup fog | peak | peak gust |
| peak plain | pearlite | pearly lustre |
| peat | peat bog | peat breccia |
| peat coal | peat formation | peat soil |
| pebble | pebble armor | pebble bed |
| pebble coal | pebble dike | pebble peat |
| pebble phosphate | pebbly mudstone | pebbly sand |
| pebbly sandstone | pectoral | ped |
| pedality | pedestal boulder | pedicle |
| pediment gap | pediment pass | pedimentation |
| pediplain | pediplanation | pediplane |
| pedlogy | pedocal | pedogenics |
| pedogeochemical survey | pedogeography | pedography |
| pedolith | pedologic age | pedologic unit |
| pedon | pedorelic | pedosphere |
| peel thrust | peer | peg model |
| pegmatite | pegmatitization | pelagic |
| pelagic limestone | pelagochthonous | pelagsic zone |
| pelelith | pele’s hair | pele’s tears |
| pelite | pelitic | pell-mell structure |
| pellet | pellicle | pencil cleavage |
| pencil ore | pendent terrace | penetration funnel |
| penetrative (adj) | peninsula | pennant |
| peperite | perbituminous (adj) | perched block |
| perching bed | percolation | percussion mark |
| pereletok | perezone | perfect prognostic |
| perfemic rock | perforation deposit | pergelic |
| pericline | pericline ripple mark | periglacial |
| perimagmatic | periodic | periodic current |
| peripheral faults | perlite | perlucidus |
| permafrost | permafrost island | permafrost line |
| permafrost table | permanent current | permanent extinction |
| permeability trap | permeable | permeable bed |
| permineralization | perpendicular slip | perpendicular slope |
| perpendicular throw | perret phase | persalic rock |
| persistence forecast | peru current | petrifaction |
| petrochemistry | petrogenesis | petrographer |
| petrographic facies | petrographic period | petrographic province |
| petrography | petrol, petroleum | petroleum geology |
| petroleum trap | petrolliferous | petrologist |
| petrology | petromict | petromorph |
| petrophysics | petrotectonics | phacolith |
| phanero crystalline texture | phantom | phantom horizon |
| phase | phase inequality | phase lag |
| phonolite | phosphatic nodule | phosphatization |
| phosphorescence | phosphorite nodules | phosphorization |
| photochemical smog | photoclinometry | photogeologic anomaly |
| photogeologic map | photogeology | photogeomorphology |
| photons | phreatic | phreatic gas |
| phyllofacies | phyllomorphic stage | phylogeny |
| phylum | physical changes | physical exfoliation |
| physical geography | physical geology | physical meteorology |
| physical oceanography | physical residue | physical stratigraphy |
| physical time | physiographic diagram | physiographic feature |
| physiographic form | physiographic province | physiography |
| phyteral (adj) | piecemeal stoping | piedmont |
| piedmont angle | piedmont benchland | piedmont glacier |
| piedmont gravel | piedmont plateau | piedmont scarp |
| piedmont step | piezocrystallization | piezogene |
| pigment | pike | pillow jointing |
| pillow lava | pillow structure | pilmer |
| pilot report | pimple mound | pimple plain |
| pincer | piner | pinnacled iceberg |
| pipe clay | pipe vesicle | pipernoid texture |
| pisolite | pisolith | pisolitic structure |
| pisolitic tuff | pit spring | pit-run gravel |
| pitch | pitchstone | pitted outwash plain |
| pitted pebble | placanticline | placer |
| plain | plain of denudation | plain of lateral planation |
| plain of marine denudation | plain of marine erosion | plain tract |
| plain-type fold | plan | planar cross-bedding |
| planate | planation | plane atmospheric wave |
| plane bed | planet | planetary boundary layer |
| planetary geology | planetary vorticity effect | planetary wind |
| plankton | planoconformity | planosol |
| plasma mantle | plasma sheet | plasmapause |
| plasmasphere | plaster conglomerate | plastic (adj) |
| plastic (n) | plastic equilibrium | plastic limit |
| plastic zone | plasticity index | plate tectonics |
| plateau | plateau basalt | plateau gravel |
| plateau mountain | plateau plain | plateform beach |
| platelets | platform | platform reef |
| platte | platy | playa |
| playfair’s law | plication | plinthite |
| plow sole | plow wind | plucking |
| plug dome | plug reef | plume structure |
| plunge | plunge basin | plunge point |
| plunging breaker | plunging cliff | plunging fold |
| plutology | pluton | plutonic (adj) |
| plutonic breccia | plutonic metamorphism | plutonic rock |
| plutonism | pluvial | pluvial lake |
| pluviofluvial | pluviometric coefficient | pneumatogenic |
| pneumatolitic deposits | pneumatolysis | pneumatolytic |
| pneumatolytic stage | pneumotectic | |
| pocket beach | pocket field luminoscope | pocket valley |
| podzoe | podzol | podzolization |
| poikiloblast | poikilotope | poikilotopic (adj) |
| point | point rainfall | poisson relation |
| polacke | polar air/easterlies | polar circle |
| polar continental air | polar convergence | polar desert |
| polar front | polar front theory | polar ice |
| polar maritime air | polar meteorology | polar outbreak |
| polar regions | polar trough | polar variation |
| polar vortex | polar-cap absorption | polar-easterlies index |
| polarity zone | polarization isocline | pole tide |
| pollen | polygenetic | polygeosyncline |
| polygonal ground | polygonal karst | polymetamorphism |
| polyn’ya | polytropic atmosphere | pond |
| pondage land | ponente | poniente |
| pontic | pool | porcelain jasper |
| porcelaneous | pore compressibility | pore pressure |
| pore space | pore-size distribution | porphyry |
| positive element | positive landform | positive movement |
| posthumous structure | postmagmatic | postorogenic |
| potato stone | potential | potential index of refraction |
| pothole | potrero | pottery |
| pottery pigments | pouch | poulter seismic method |
| powder avalanche | pozzolan | praecipitatio |
| prairie soil | prealpine facies | precious stone |
| precipice | precipitable water | precipitation area |
| precipitation cell | precipitation echo | precipitation facies |
| precipitation intensity | precipitation inversion | precipitation physics |
| precipitation station | precipitation trajectory | preconsolidation pressure |
| prediction | prefrontal squall line | prehensive |
| preliminary waves | preorogenic | pressolved |
| pressure | pressure altitude | pressure centre |
| pressure contour | pressure depth | pressure field |
| pressure ice | pressure jump | pressure pan |
| pressure pattern | pressure plateau | pressure release |
| pressure ridge | pressure tendency | pressure wave |
| pressure-altitude variation | pressure-change chart | pressure-fall center |
| pressure-gradient force | pressure-jump line | pressure-release jointing |
| pressure-rise center | presuppression | prevailing current |
| prevailing visibility | prevailing westerlies | prevailing wind direction |
| primary arc | primary crater | primary cyclone |
| primary deposit | primary flat joint | primary front |
| primary great circle | primary magma | primary mineral |
| primary orogeny | primary outcrop | primary pollutant |
| primary porosity | primary source | primary stratification |
| primary stratigraphic trap | prime meridian | prime vertical circle |
| priming of the tides | primitive | principal vertical circle |
| prism crack | prismatic crystals | probability forecast |
| probable maximum precipitation | probing | process lapse rate |
| prod cast | prod mark | prodelta |
| prodelta clay | profile | profile line |
| profile of equilibrium | profile section | profit |
| proglacial | prognostic chart | prognostic equation |
| progradation | prograde metamorphism | prograding shoreline |
| progressive metamorphism | progressive sand wave | progressive sorting |
| progressive wave | proluvium | promontory |
| propagation forecasting | properties | prospecting |
| prostratigraphy | protactinium-ionium age method | protointraclast |
| prove | provenance | province |
| provincial series | proximal | proximate analysis |
| psammitic rock | psephicity | psephite |
| psephite rock | psephyte | pseudo front |
| pseudo ripple mark | pseudo-oolith | pseudoadiabat |
| pseudoadiabatic expansion | pseudocannel coal | pseudocol |
| pseudoconglomerate | pseudodiffusion | pseudofault |
| pseudofibrous peat | pseudogley | pseudogradational bedding |
| pseudokarst | pseudomountain | pseudonodule |
| pseudotillite | pseudounconformity | pseudovitrinite |
| pseudovitrinoid | pseudovolcano | pteropod ooze |
| puddingstone | puff of wind | pumice |
| pumice fall | pumiceous | pumilith |
| purga | purple light | push moraine |
| pycnocline | pyritization | pyritobitumen |
| pyroclast | pyroclastic flow | pyroclastic ground surge |
| pyroclastic rock | pyrogenesis | pyrogenetic mineral |
| pyromagma | pyrosphere |
| quadrate | quagmires | quake sheet |
| quaking bog | qualitative (adj) | quality of snow |
| quantitative geomorphology | quantum mineralogy | quaquaversal |
| quarry | quartz | quartz sandstone |
| quartz topaz | quasi-equilibrium | quaternary |
| quenched water | quick clay | quicksand |
| quilted surface |
| rabal | rachis | radar meteorological observation |
| radar meteorology | radar report | radar storm detection |
| radar storm-detection equation | radar, wind | radial drainage pattern |
| radial faults | radiating | radiation budget |
| radiation chart | radiation fog | radiational cooling |
| radiational inversion | radiative diffusivity | radiatus |
| radicus | radio duct | radio hole |
| radio meteorology | radio valve | radio window |
| radioactive decay | radioactive fission | radioactive metals |
| radioactive minerals | radioactive radiation | radiochronology |
| radiogeology | radioglaciology | radiometric age |
| radiometric lines | raffiche | raft |
| rafted ice | rafting | raggiaturea |
| rain | rain cloud | rain pillar |
| rain prints | rain shadow | rain stage |
| raindrop | rainfall | raininess |
| rainsquall | rainwash | raised beech |
| rampart | rampart wall | random forecast |
| rapid | rare earth element | rare element |
| rare metal | rate of sedimentation | rate of-change map |
| ratio map | ratio of rise | rattle stone |
| rattlesnake ore | ravelly ground | ravine |
| ravinement | raw | raw map |
| raw material | rawin | rawinsonde |
| ray parameter | rayleigh atmosphere | rayleigh wave |
| razorback | reaction | reading |
| reagent | rebound | recession |
| recessional moraine | reconnaissance map | record observation |
| recrystallization flow | rectangular cross ripple mark | rectangular drainage pattern |
| rectilinear shoreline | rectorite | recumbent fold |
| recurrent folding | recurvature | recurved spit |
| red clay | red earth | red magnetism |
| red mud | red ochre | red sea |
| redbed | reddish-brown lateritic soil | reddish-brown soil |
| redeposition | redoxomorphic stage | reduced pressure |
| reduction | reduction index | reduction of tidal current |
| reduction of tides | reduction sphere | reduzate |
| reef | reef cap | reef cluster |
| reef complex | reef debris | reef detritus |
| reef front | reef knoll | reef patch |
| reef pinnacle | reef segment | reef slope |
| reef talus | reef tufa | reef wall |
| reentrant | reference locality | reference section |
| reference spheroid | reference station | reflected buried structure |
| reflolding | refoliation | refraction coefficient |
| refraction diagram | refractory | refractory clay |
| reg | regime | regional dip |
| regional geology | regional metamorphism | regional slope |
| regional slope deposit | regional unconformity | registering unit |
| regmaglypt | regolith | regradation |
| regression | regression conglomerate | regression reef |
| regression ripple | regression sediment | regur |
| rejuvenate | rejuvenated fault scarp | rejuvenation |
| relative age | relative chronology | relative current |
| relative dating | relative geologic time | relative humidity |
| relative time | relaxation | release fracture |
| release mineral | relic | relict |
| relict dike | relict mineral | relict sediment |
| relict soil | relict texture | relief, mature |
| relief, old | relief, youthfat | remanent magnetization |
| remnants of oxygen | remolded soil | remolding index |
| repetition | replacement | replacement deposit |
| replacement dike | replacement texture | replacement vein |
| replenishment | reptiles | repulsion |
| resedimentation | resequent | resequent fault-line scarp |
| reserve | reserve, assured | reserve, estimated |
| reserve, indicated | reserve, inferred | reserve, possible |
| reserve, probable | reservoir fluid | reservoir pressure |
| reservoir rock | reshabar | residual |
| residual anticline | residual clay | residual compaction |
| residual kame | residual liquid | residual magmatic melt |
| residual map | residual material | residual mineral |
| residual ochre | residual swelling | residual valley |
| resinite | resinous coal | resinous luster |
| resistate | resistivity method | resonance trough |
| resorbed reef | resource | rest magma |
| restricted | restricted basin | resurgent |
| reticular | reticulated bar | retrograde reservoir |
| retrograde wave | retrograding shoreline | return streamer |
| reversal of dip | reverse cell | reverse fault |
| reverse saddle | reverse similar fold | reverse slope |
| reversed arc | reversed polarity | reversed tide |
| reversible current | reversible dune | revolute joint |
| revolution | revolving storm | rework (v) |
| reynolds effect | reynolds model | rhegmagensis |
| rheid | rheid fold | rheidity |
| rheolignimbrite | rhexistasy | rhinoceratidae |
| rhizosphere | rhomboid ripple mark | rhourd |
| rhyolitic lava | rhyolitic tuff | rhyoltic glass |
| rhythmic accumulations | rhythmic layering | rhythmic sedimentation |
| rhythmic stratification | rhythmic succession | ria |
| ribbon bomb | ribbon diagram | ribbon jasper |
| ribbon lightning | ribbon reef | ribbon structure |
| ribut | rice coal | richter scale |
| rideau | ridge fault | ridge ice |
| ridging | riebungsbreccia | riegel |
| rift | rift valley | rift-block mountain |
| right way up | rill erosion | rill mark |
| rillenstein | rim gypsum | rim ridge |
| rim syncline | rima | rimmed kettle |
| rimmed solution pool | rimmed wall | rimrock |
| rimstone | rincon | ring complex |
| ring depression | ring dike | ring fault |
| ring fissure | ring-fracture stopping | ringite |
| rip | rip channel | rip current |
| ripple bedding | ripple biscuit | ripple drift |
| ripple index | ripple lamina | ripple mark |
| ripple scour | ripple symmetry index | ripple till |
| rips | rise of tide | rise pit |
| rising tide | river | river bar |
| river basin | river bottom | river drift |
| river erosion | river morphology | river run gravel |
| river terrace | river valley | river-deposition coast |
| riverbed | riverwash | riving |
| roadstead | roaring forties | roaring sand |
| roasting | robin hood’s wind | roche moutonnee |
| rock | rock avalanche | rock control |
| rock creep | rock crystal | rock cycle |
| rock desert | rock drumlin | rock effusive |
| rock failure | rock fall | rock fan |
| rock flour | rock forming | rock glacier |
| rock glacier creep | rock magnetism | rock matrix compressibility |
| rock mechanics | rock pediment | rock permeability |
| rock pillar | rock pool | rock pressure |
| rock river | rock rubber | rock rudaeceous |
| rock shelter | rock stack | rock staff |
| rock stratigraphic unit | rock stream | rock system |
| rock tar | rock terrace | rock texture |
| rock ultrabasic | rock weathering | rock, acid |
| rock, avenaceous | rock, awash | rock, basic |
| rock, clastic | rock, ferruginous | rock, hypabyssal |
| rock, metamorphic | rock, pyroclastic | rock, sedimentary |
| rock, siliceous | rock-bulk compressibility | rock-defended terrace |
| rocket lightning | rocking slide | rocking stone |
| rocking the pan | rodents | rofla |
| roll | rollers | rolling beach |
| rolling plains | romanche trench | roof foundering |
| roof pendant | roofed dike | root cast |
| root sheath | root zone | rootless vent |
| ropak | rose diagram | ross barrier |
| ross sea | rossby wave | rossei current |
| rotary current | rotary fault | rotating model |
| rotational bomb | rotational lanslide | rotational movement |
| rotor cloud | rougemontite | roughness elements |
| round wind | roundness | roundstone |
| route component | route forecast | routivarite |
| rubber ice | rubble drift | rubble tract |
| rubidium-strontium dating | ruby | ruby mica |
| ruby silver | rudite | ruffle |
| ruffled groove cast | rugged terrain | ruggedness number |
| rule of v’s | runnel | rupture zone |
| rusting |
| s wave | S-type magma | sackungen |
| saddle | saddle fold | saddle reef |
| saddleback | safety factor | sag pond |
| sag-andswell topography | sagenitic (adj) | saint peter sandstone |
| salado formation | salammoniac | salcrete |
| salfemic rock | salic | salient |
| salierous stratum | salina | salinastone |
| saline soil | saline-alkali soil | salinelle |
| salinity | salinity current | salinization |
| salt anticline | salt bottom | salt burst |
| salt dome | salt field | salt flat |
| salt glazing | salt haze | salt hill |
| salt petre | salt pillow | salt pit |
| salt polygon | salt tectonics | salt water |
| salt weathering | salt-affected soil | salt-and-pepper sand |
| salt-water front | salt-water wedge | saltmarsh |
| saltpeter cave | saltpeter earth | sample |
| sample bulk | sample grab | sample groove |
| sand | sand apron | sand avalanche |
| sand bar | sand bed | sand cloud |
| sand cone | sand crystal | sand dike |
| sand drift | sand drip | sand dune |
| sand flood | sand glacier | sand heap |
| sand hill | sand hole | sand horn |
| sand lobe | sand pavement | sand pipe |
| sand plain | sand reef | sand ridge |
| sand river | sand run | sand sea |
| sand sheet | sand splay | sand spout |
| sand stone | sand streak | sand strip |
| sand wave | sand wedge | sandbank |
| sandbar (sand reef) | sandblasting | sandiness |
| sandkey | sandrock | sandshale |
| sandspit | sandstone dike | sandstone sill |
| sandstorm | sandyish (adj) | sand–shale ratio |
| sanitary sewer | sansicl | santa ana |
| santa rosa storm | sapping | saprolite |
| sapropel | sapropel-clay | sapropelic coal |
| saprophytic fungi | sargasso sea | satellite meteorology |
| satin spar | saturated air | saturated mineral |
| saturated permsfrost | saturation | saturation adiabat |
| saturation curve | saturation deficit | saturation mixing ratio |
| saturation ratio | saturation-adiabatic process | savier orogeny |
| scabland | scabrock | scaglia |
| scale height | scales of motion | scalloping |
| scaly | scar | scarp slope |
| scarped plain | scarpland | scarpline |
| scattered | scattering layer | scharnitzer |
| schist | schistose | schistosity |
| schlernwind | schungite | scissors fault |
| scolite | scopulite | scoria |
| scoria cone | scoria mound | scoria tuff |
| scoring | scotch mist | scour |
| scour and fill | scour channel | scour lineation |
| scour mark | scouring | scouring velcoity |
| scourway | scraper | scree |
| screen | screened pan | screw field |
| scroll meander | scrub | scud |
| scum | sea | sea arch |
| sea ball | sea basins | sea breeze |
| sea cave | sea channel | sea cliff |
| sea cucumber | sea fan | sea floor |
| sea fog | sea front | sea glow |
| sea ice | sea level | sea mud |
| sea peak | sea salt | sea slope |
| sea state | sea turn | sea valley |
| sea-floor spreading | sea-ice shelf | sea-level pressure |
| sea-salt nucleus | sea-surface slope | seabeach |
| seabed | seacoast | sealing-wax structure |
| seamount | seamount chain | seamount group |
| seamount range | seaquake | seascape |
| seascrap | seashore | seashore lake |
| seasonal current | seasonal thermocline | seasonallly frozen ground |
| seawater | sebkha | seca |
| sechard | seclusion | second bottom |
| second-derivative map | second-order station | second-year ice |
| secondary clay | secondary coast | secondary cold front |
| secondary consolidation | secondary cosmic rays | secondary crater |
| secondary cyclone | secondary deposit | secondary enrichment |
| secondary front | secondary geosyncline | secondary great circle |
| secondary interstices | secondary mineral | secondary pollutant |
| secondary porosity | secondary stratification | secondary wave |
| secretion | sectile | sector wind |
| secundine dike | sedentary soil | sediment |
| sediment transport | sediment yield | sediment-delivery ratio |
| sediment-production rate | sedimentary differentiation | sedimentary dike |
| sedimentary facies | sedimentary insetion | sedimentary laccolith |
| sedimentary lag | sedimentary rock | sedimentary series |
| sedimentary structure | sedimentary tectonics | sedimentary trap |
| sedimentary tuff | sedimentary volcanism | sedimentation basin |
| sedimentation condition | sedimentation curve | sedimentation diameter |
| sedimentation radius | sedimentation rate | sedimentation trend |
| sedimentation trough | sedimentation unit | sedimentology |
| seedling | seep | seepage |
| seepage face | seepage velocity | seeping |
| segregated vein | segregation | seif dune |
| seismic anisotropy | seismic belt | seismic discontinuity |
| seismic efficiency | seismic event | seismic gradient |
| seismic hazard | seismic intensity | seismic map |
| seismic prospecting | seismic ray | seismic reflector |
| seismic risk | seismic stratigraphy | seismic tomography |
| seismic velocity | seismic-eletric effect | seismicity |
| seismographs | seismology | selatan |
| selection | selective fusion | selective replacement |
| self-reversal | self-rising ground | selvages |
| semianthracite | semibituminous coal | semibolson |
| semibright coal | semidiurnal current | semidiurnal tide |
| semiprecious stone | semisplint coal | senesland |
| senile | senility | sensible atmosphere |
| sensible heat flow | sensible temperature | sensitive clay |
| septarian | septarium | sequence |
| sequence of current | sequence of tide | sequence stratigraphy |
| sequential landform | serein | serial observation |
| serial station | seriate | sericite |
| sericitization | serlility | serpentine rock |
| serpentine spit | seston | set |
| setting | settled | settling velocity |
| severe storm | severe weather | severe-storm observation |
| sferics fix | sferics observation | shale |
| shale ball | shale break | shale crescent |
| shale reservoir | shallow fog | shallow inland seas |
| shallow-focus earthquake | shaly | shaly bedding |
| shark-tooth projection | sharp sand | sharp-edged gust |
| sharpstone | shatter cone | shatter zone |
| sheaf structure | shear fold | shear joint |
| shear line | shear moraine | shear plane |
| shear slide | shear sorting | shear structure |
| shear surface | shear zone | shear-gravity wave |
| sheath | sheer | sheet |
| sheet crack | sheet deposit | sheet drift |
| sheet erosion | sheet lightning | sheet like ore bodies |
| sheet sandstone | sheet spar | sheeted fissure |
| sheeted zone | sheeting | sheeting structure |
| shelf | shelf break | shelf channel |
| shelf edge | shelf facies | shelf sea |
| shelfstone | shell marl | shell sand |
| shelly | shelter cave | shelter porosity |
| sherry topaz | shield | shield basalt |
| shield cone | shield volcano | shielding layer |
| shifting | shimmer | shingle |
| shingle barchan | shingle beach | shingle rampart |
| shingle ridge | shoal | shoal patches |
| shoal reef | shoal water | shock lithification |
| shock loading | shock zone | shoestring |
| shoestring sand | shore | shore ice |
| shore platform | shore terrace | shoreface |
| shoreline | shoreline cycle | shoreline of depression |
| shoreline of elevation | shoreline of emergence | shoreline of submergence |
| shoreline-development ratio | shores well | short crested wave |
| short range forecast | shrew | shrinkage crack |
| shrinkage index | shrinkage limit | shrinkage pore |
| shrinkage ratio | shrub-coppice dune | shuga |
| shungite | siberian high | sideroferrite |
| sideronitic texture | sierra | sieve deposition |
| sigmoidal dune | sigmoidal fold | significant wave |
| sigua | sikussak | silcrete |
| silexite | silica sand | silication |
| siliceous earth | siliceous sediment | silicification |
| silicified wood | silicinate | sill depth |
| silt | silt loam | silt soil |
| siltstone | silttil | silver frost |
| silver thaw | similar fold | simoom |
| simple crater | simple cross bedding | simple shear |
| simple spit | simple valley | singing sand |
| single acting stream hammer | single-impulse welding | single-station analysis |
| single-theodolite observation | singular corresponding point | singularity |
| sinistral fold | sink | sinkhole |
| sinkhole plain | sinking | sinter |
| siphon | sirocco | skam |
| skeleton layer | skeleton soil | skerry |
| sketch | skew bridge | skew grid |
| skin | skin-friction coefficient | skip mark |
| skiron | sky cover | slab jointing |
| slack | slack water | slack weather |
| slag | slaking | slate ribbon |
| slaty cleavage | sleet | sleeves |
| slice | slice method | slick |
| slickens | slickenside | slickolite |
| slide caliper | sliding scale | slime |
| sliming | slimy | slip |
| slip bedding | slip block | slip circle |
| slip cleavage | slip face | slip sheet |
| slip surface | slip-off slope | slope |
| slope conveyor | slope correction | slope failure |
| slope stability | slope wash | slot |
| slud | sludge | sludge cake |
| sludge floe | sludge lump | slug |
| slump | slump ball | slump basin |
| slump bedding | slump fold | slump overfold |
| slump scarp | slump sheet | slump structure |
| slurry | slurry slump | slush avalanche |
| slush icing | slush pans | small circle |
| small craft warning | small diurnal range | small hail |
| small ice floe | small ion | small tropic range |
| small-ion combination | smectite | smelt |
| smelter | smog | smoke black |
| smoke hole | smoke horizon | smokes |
| smooth | smooth chert | smooth phase |
| smooth sea | smothered bottom | snap |
| snout | snow | snow accumulation |
| snow banner | snow blink | snow cloud |
| snow crystal | snow dust | snow eater |
| snow flurry | snow geyser | snow grains |
| snow line | snow pellets | snow shovel |
| snow slip | snow sludge | snow stage |
| snow-cover chart | snowfall | snowstorm |
| soapstone | socked in | soffione |
| soil | soil air | soil chemistry |
| soil colloid | soil complex | soil conservation |
| soil creep | soil element | soil erosion |
| soil genesis | soil physics | soil profile |
| soil science | soil separate | soil series |
| soil shear strength | soil stripes | soil structure |
| soil survey | sol-air temperature | solaire |
| solano | solar absorption index | solar air mass |
| solar atmospheric tide | solar constant | solar tide |
| solar wind | solar-radiation observation | solar-terrestrial phenomena |
| solder | sole | sole injection |
| sole mark | solenoidal index | solfatara |
| solidification | solidification of magma | solifluction |
| solifluction lobe | solifluction mantle | solifluction sheet |
| solifluction stream | solodize (v) | solonchak soil |
| solonetz soil | solore | soloth soil |
| solstitial tidal currents | solstitial tide | solution groove |
| solution pool | solution potholes | soma |
| sonora | sorotiite | sorting |
| sorting coefficient | sorting index | sounding sand |
| source | source bed | source region |
| source rock | south | south america |
| south atlantic current | south equatorial current | south foehn |
| south frigid zone | south geographical pole | south geomagnetic pole |
| south indian current | south pacific current | south temperate zone |
| southeast drift current | southeaster | souther |
| southerly burster | southwester | spall |
| spalling | sparry cement | spasmodic turbidity current |
| spathic iron ores | spatial autocorrelation | spatial dendrite |
| spatial lattice | spatter cone | spatter rampart |
| specail weather report | special observation | specialization |
| species | species number | specific humidity |
| specific retention | specific-volume anomaly | spelean |
| speleology | speleothem | spending beach |
| sphenochasm | sphenolith | spherical nodules |
| spheroidal recovery | spheroidal weathering | spherulite |
| spilling | spiral band | spit |
| spitsbergen current | splash erosion | splay foot |
| spliced | splint | splint coal |
| splinters | splinting fracture | spodic horizon |
| spodosol | sponge | spongework |
| spongolite | spontaneous fission | spontaneous nucleation |
| sporadic E layer | spore | spot wind |
| spouting horn | spring range | spring tidal currents |
| spring tide | spring velocity | sprinkle |
| spur | squall | squall cloud |
| squall line | stability chart | stability index |
| stack | stage | stalactite |
| stalagmite | stalk | stamukha |
| standard artillery atmosphere | standard artillery zone | standard atmosphere |
| standard meridian | standard pressure | standing cloud |
| star fish | starved basin | state of the sea |
| state of the sky | static metamorphism | static oceanography |
| static stability | station continuity chart | station elevation |
| station model | station pressure | statistical forecast |
| steam fog | steatization | steel |
| steinkern | stellar lightning | step fault |
| step-out time | steppe | steppe soil |
| stepped leader | steptoe | stewartite |
| still-water level | stinkstone | stockpile |
| stockwork | stone | stone coal |
| stone falls | stone gall | stone ring |
| stony meteorite | stony-iron meteorite | stooping |
| stope | storage batteries | storm |
| storm beach | storm center | storm detection |
| storm glass | storm ice foot | storm microseism |
| storm model | storm proof | storm surge |
| storm tide | storm track | storm transposition |
| storm warning | storm wind | storm-warning signal |
| storm-warning tower | stormless | stowing |
| strain-slip | strait | strand |
| stranded ice | stranded ice foot | strandline |
| strata | strategic | strath |
| strath terrace | stratification | stratification index |
| stratification plane | stratified drift | stratified ocean |
| stratiform | stratiformis | stratigrapher |
| stratigraphic map | stratigraphic oil fields | stratigraphic throw |
| stratigraphic unit | stratigraphy | stratocumulus |
| stratopause | stratosphere | stratospheric coupling |
| stratotype | stratovolcano | stratpsphere radiation |
| stratum | stratus | stray |
| stray sand | streak lightning | stream capacity |
| stream channel | stream draining | stream erosion |
| stream frequency | stream gradient | stream gradient ratio |
| stream load | stream terrace | stream tin |
| stream transport | streamer | streamsink |
| strength of current | strength of ebb | strength of flood |
| strength-of-ebb interval | strength-of-flood interval | stretched pebbles |
| stretcher | striatigraphy | striation |
| strike | strike fault | strike slip |
| strike-slip fault | stringer | stringer lode |
| strip mining | striped ground | stripped plain |
| stripped structural surface | stromatolite | stromatolith |
| strombolian | strong breeze | strong gale |
| structural bench | structural contour map | structural geology |
| structural high | structural low | structural terrace |
| structural trap | structural valley | structure |
| structure contour | structure section | structure-contour map |
| stuffed mineral | stull piece | stuve chart |
| stylolite | sub-class | subaerial |
| subalkaline | subantarcitc intermediate water | subaqueous dune |
| subarctic | subarkose | subbituminous coal |
| subbottom reflection | subcapillary interstice | subconchoridal |
| subcontinent | subcrop | subduction |
| subfeldpathic | subgelisol | subgeostropic wind |
| subglacial | subgradient wind | subjacent |
| subjacent igneous body | sublacustrine | sublacustrine channel |
| sublimation nucleus | sublimation vein | sublittoral zone |
| submarine canyon | submarine effusion | submarine fan |
| submarine isthmus | submarine peninsula | submarine pit |
| submarine relief | submarine station | submarine topogrpahy |
| submarine weathering | submerged breakwater | submerged coastal plain |
| submerged lands | submergence | subpolar high |
| subpolar low-pressure belt | subsequent | subsequent valley |
| subsidence | subsidence inversion | subsoil |
| substratosphere | substratum | subsurface current |
| subsurface geology | subtropic | subtropical convergence |
| subtropical cyclone | subtropical easterlies index | subtropical high |
| subtropical high-pressure belt | succulent | suestada |
| suevite | sugar berg | sugarloaf sea |
| sukhovel | sulfofication | sulfur ball |
| sullage | sultriness | summation principle |
| summit | sun cross | sun drawing water |
| sun pillar | sunlit aurora | sunstroke |
| super capillary interstice | superadiabatic lapse rate | supercontinent |
| supercooled cloud | supergene | supergradient wind |
| superimposed | superimposed fan | superimposed glacier |
| superimposed valley | superincumbent | superior air |
| superior tide | supermature | superposition |
| superresolution | supersaturation | supralateral tangent arcs |
| supratidal sediment | supratidal zone | surf |
| surf beat | surf ripple | surf zone |
| surface boundary layer | surface chart | surface creep |
| surface current | surface duct | surface friction |
| surface geology | surface inversion | surface mining |
| surface moraine | surface phase | surface pressure |
| surface soil | surface temperature | surface visibility |
| surface weather observation | surface wind | surficial deposit |
| surficial geology | surfwave | surge |
| surge line | suroet | survey |
| suspended load | swale | swallow hole |
| swamp | swamp taiga | swampy soil |
| swash | swell | swell direction |
| swell forecast | swell-and-swale topography | swelled ground |
| swelling clay | symbol | symmetric ripple mark |
| symmetrical fold | symmict | symon’s cone crusher |
| syncline | synclinorium | syngenesis |
| syngenetic | synoptic | synoptic chart |
| synoptic code | synoptic meteorology | synoptic model |
| synoptic oceanography | synoptic report | synoptic wave chart |
| synoptic weather observation | synorogenic, syntectonic (adj) | syntectic |
| syntexis | systematic joints |
| table knoll | table mountain | table reef |
| tabling | tabular | tabular crystals |
| tabular iceberg | tachylite | taconian orogeny |
| tailwind | taino | taku wind |
| talc | talik | talus |
| talus slope | talweg | tangent arc |
| tantalum | taphonomy | taphrogeny |
| taphrogeosyncline | tar sand | tar seep |
| tarantata | tarn | tarnish |
| tear fault | technology | tectofacies |
| tectogene | tectomosphere | tectonic cycle |
| tectonic forces | tectonic framework | tectonic land |
| tectonic lens | tectonic map | tectonic moraine |
| tectonic movement | tectonic patterns | tectonic plate |
| tectonic rotation | tectonoeustatism | tectonomagnetism |
| tectonophysicist | tectonophysics | teeth of the gale |
| tehuantepecer | tektite | telemagnetic |
| telemeteorometry | telescope structure | teleseism |
| telesismology | telethermal | temperate-westerlies index |
| temperature belt | temperature fluctuations | temperature inversion |
| temperature-humidity index | temperature-salilnity diagram | tempo |
| temporal | temporal unit | temporale |
| temporary base level | tenacity | tendency equation |
| tendency interval | tension crack | tension fault |
| tension fracture | tension joint | tented ice |
| tepee butte | tepee structure | tephra |
| tephrochronology | terdiurnal | terminal |
| terminal forecast | terminal moraine | tern |
| terra rossa | terrace like bench deposits | terraced pool |
| terracette | terrain | terral levante |
| terrane | terrestrial | terrestrial electricity |
| terrestrial environment | terrestrial gravitation | terrestrial radiation |
| terrestrial sediment | terrigenous sediment | territory |
| tertiary circulation | tethys | tetravalent |
| texture | thalassic | thalassocratic |
| thalassophile element | thalweg | thermal |
| thermal convection | thermal gradient | thermal jet |
| thermal steering | thermal tide | thermal vorticity |
| thermal vorticity advection | thermal wind | thermal wind equation |
| thermocline | thermohaline | thermohaline convection |
| thermokarst to | thermokarst topography | thermometric depth |
| thermoremanent magnetization | thermosphere | thermotropic model |
| thick-bedded (adj) | thick-skinned structure | thickness |
| thickness chart | thickness line | thickness of deposit |
| thickness pattern | thiessen polygon method | thin |
| thin section | thin-bedded | thin-out |
| thin-skinned structure | thirty-day forecast | thixotropic clay |
| thorax | threshold velocity | thrust fault |
| thrust nappe | thucolite | thunder |
| thunderbolt | thundercloud | thunderstorm |
| thunderstorm cell | thunderstorm charge separation | thunderstorm day |
| tibin | tidal channel | tidal constants |
| tidal correction | tidal current | tidal datum |
| tidal day | tidal delta | tidal difference |
| tidal energy | tidal excursion | tidal flat |
| tidal frequency | tidal friction | tidal gate |
| tidal harbor | tidal inlet | tidal marsh |
| tidal platform ice foot | tidal pool | tidal potential |
| tidal power | tidal prism | tidal quay |
| tidal scour | tidal water | tidal wave |
| tidal wind | tidal-current chart | tidal-current tables |
| tidalite | tide | tide amplitude |
| tide crack | tide curve | tide cycle |
| tide hole | tide lock | tide notes |
| tide prediction | tide race | tide range |
| tide rips | tide station | tide table |
| tide wave | tidehead | tideland |
| tidemark | tidewater | tideway |
| tight sand | till | till billow |
| till plain | till sheet | tilloid |
| tilt | tilt block | tilted iceberg |
| tilted interface | tilth | time correlation |
| time lag | time line | time-stratigraphic facies |
| time-stratigraphic unit | tin plague | tips of the pincers |
| tissues | titanium | tivano |
| toe | tofan | tombolo |
| tongara | tonnage factor | top soil |
| top soiling | topaz | topographic curl effect |
| topographic passage | topographic unconformity | topography |
| topset bed | tor | torbanite |
| tornado | tornado belt | tornado echo |
| torrent | torret | torrox |
| tosca | total conductivity | total porosity |
| toughness | touriello | towering |
| towering cumulus | toxic | trace element |
| trace fossil | track | traction |
| tractors | trade-wind | trade-wind cumulus |
| trade-wind inversion | traersu | tramontana |
| transcurrent fault | transform fault | transformation |
| transgression | transgressive deposit | translational fault |
| translational movement | translucent | translucidus |
| transmission function | transparent | transparent sky cover |
| transportation | transverse | transverse bar |
| transverse dune | transverse fault | transverse ripple mark |
| transverse valley | transverse wave | trapdoor fault |
| travel-time curve | traverse | traversia |
| traversier | travertine | tremor |
| trench | trench shield | trenching |
| trend | trenol | triangular facet |
| triatomic (adj) | tributary | tributary glacier |
| trilobite | trimming of specimen | tripoli |
| trisocta hedron | tristetra hedron | trolley |
| tropic high-water inequality | tropic low-water inequality | tropic tidal currents |
| tropic tide | tropic velocity | tropical air |
| tropical climate | tropical cyclone | tropical disturbance |
| tropical easterlies | tropical meteorology | tropopause |
| tropopause chart | troposphere | trough |
| trough crossbedding | trough fault | trough surface |
| true air temperature | true convergence | true crater |
| true mean temperature | true wind | true wind direction |
| truncated landform | tsunami | tuba |
| tube | tufa | tufaceous |
| tuff | tumuli lava | turbidite |
| turbidity current | turbidity factor | turbonada |
| turbosphere | turbulent heat conduction | turtle |
| twig | twister | two-layer ocean |
| type area | typhoon | typical |
| U-shaped valley | ubac | ulmin |
| ulna | ultisol | ultrabasic igneous rock |
| ultravulcanian (adj) | umbo | unconformable |
| unconformity | unconformity iceberg | unconsolidated material |
| underclay | underclay limestone | undercliff |
| underconsolidation | undercurrent | undercutting |
| underflow conduit | underground water | underlie |
| underthrust | undertow | uniformitarianism |
| unio | universal transmission function | unlimited ceiling |
| unrestricted visibility | unsettled | updrift |
| uphole time | upland | upper air |
| upper atmosphere | upper front | upper mantle |
| upper mixing layer | upper-air disturbance | upper-atmosphere dynamics |
| upper-level anticyclone | upper-level chart | upper-level cyclone |
| upper-level ridge | upper-level trough | uprush |
| upslope fog | upthrow | upwarp |
| upwelling | upwind | uranium age |
| uranium-lead dating | urban geography | urban geology |
| urban heat island | urstromthal |
| v-shaped depression | v-shaped valley | vadose spring |
| vadose waster | vadose zone | valais wind |
| valency | vallay placers | valley |
| valley breeze | valley fill | valley flat |
| valley floor | valley iceberg | valley train |
| valley wind | valves | van allen radiation belt |
| vanishing tide | vapor pressure | vapours |
| variable ceiling | variable visibility | variation of latitude |
| variole | varval clay | varve |
| vascular | veering | veil |
| vein | vein fold | veinite |
| veinlets | velocity | vendaval |
| vent | ventifact | vento di sotto |
| ventral | vergence | vernal |
| vertical anemometer | vertical intensity | vertical slip |
| vertical stretching | vertical visibility | vertisol |
| very close pack ice | very open pack ice | virga |
| virtual gravity | virtual height | virtual pressure |
| virtual temperature | viscosity | viscous remanent magnetization |
| visibility | visor tin | visual range |
| vitrain | vitric | vitric tuff |
| viuga | volatile component | volcanic ash |
| volcanic bombs | volcanic cone | volcanic gases |
| volcanic lapilli | volcanic mud | volcanic mudflow |
| volcanic neck | volcanic rift zone | volcanic rock |
| volcanic vent | volcanism | volcano |
| volcanology | volume transport | vulcanian eruption |
| vuthan |
| wadi | wake stream theory | wall |
| wall reef | wall rock | wall-rock alteration |
| wandering dune | warm air mass | warm braw |
| warm front | warm high | warm low |
| warm pool | warm sector | warm tongue |
| warm-tongue steering | warp | wasatch winds |
| wash | wash load | wash slope |
| washover | waste mantle | water bearing stratum |
| water cloud | water equivalent | water exchange |
| water fall | water front | water gap |
| water logged | water mass | water opening |
| water sky | water trap | water type |
| water vapor absorption | water, atmosphere | wave basin |
| wave built terrace | wave cut terrace | wave cyclone |
| wave disturbance | wave forecasting | wave height |
| wave setdown | wave setup | wave theory of cyclones |
| wave-cut bench | wave-cut cliff | wave-cut platform |
| waxy (adj) | wear resistant alloy | weather |
| weather centre | weather forecast | weather map |
| weather minimum | weather modification | weather observation |
| weather pit | weather shore | weather side |
| weather signal | weather station | weather type |
| weathered iceberg | weathered layer | weathering |
| weathering product | weathering rind | weathering-potential index |
| weddell current | wedgi form | welding |
| well-sorted | west | west australia current |
| west greenland current | westerlies | western equatorial countercurrent |
| westward intensification | wet snow | wet-bulb temperature |
| wetted perimeter | whaleback dune | whirl wind |
| whirlpool | whirly | whistler |
| white squall | white water | whitecap |
| whiteout | whiting | whitleyite |
| whole gale | whool | widmanstatten pattern |
| wiik classification | wild snow | wildflysch |
| williwaw | willy-willy | wind chill |
| wind chill index | wind current | wind direction |
| wind direction shaft | wind divide | wind erosion |
| wind gap | wind ripple | wind rose |
| wind scoop | wind shear | wind shift line |
| wind speed | wind stress | wind tide |
| wind velocity | windmill | window |
| windrow | winds aloft | windstorm |
| windward side | winter | winter ice |
| winter-talus ridge | wiredrawing | wisper wind |
| wood tin | workable deposite | world rift system |
| wrench fault | wurtzilite |
| x-rays | xenolith | xerophyte |
| xerosere | xerothermic period |
| yaica | yamase | yardang |
| yardang trough | yardlung | yayoo |
| yellow hues | yellow mud | yellow sea |
| youg | youth |
| zenithal rain | zephyr | zero curtain |
| zero layer | zeuge | zigzag lightning |
| zobaa | zodiacal light | zodiacal pyramid |
| zoic | zonal | zonal flow |
| zonal index | zonal kinetic energy | zonal soil |
| zonal theory | zonal wind | zonda |
| zone of aeration | zone of cementation | zone of weathering |