Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
Ac  | |
|---|---|
| USE | actinium |
| academic institutions | |
|---|---|
| UF | colleges |
| universities | |
| RT | associations |
| Birmingham University | |
| Cambridge University | |
| Colorado School of Mines | |
| education | |
| institutions | |
| Lamont-Doherty Earth Observatory | |
| Leningrad Mining Institute | |
| Moscow University | |
| museums | |
| Ohio State University | |
| organization | |
| Pennsylvania State University | |
| SN | Reserved for any educational institution. Added to Thesaurus in 1989. |
| Acadia Parish Louisiana | |
|---|---|
| BT | United States |
| .Louisiana | |
| ..Acadia Parish Louisiana | |
| Acadian | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Paleozoic | |
| ...Cambrian | |
| ....Acadian | |
| RT | Canada |
| Acadian Phase | |
| Middle Cambrian | |
| SN | Provincial series, Canada. Considered Middle Cambrian. Rarely used. See Acadian Phase for the Devonian-Dinantian orogenic era. Indexed with age if applicable. |
| Acadian Orogeny | |
|---|---|
| USE | Acadian Phase |
| Acadian Phase | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Paleozoic | |
| ...Acadian Phase | |
| UF | Acadian Orogeny |
| RT | Upper Devonian |
| orogeny | |
| Acadian | |
| Antler Orogeny | |
| Appalachians | |
| Dinantian | |
| Eastern Canada | |
| middle Paleozoic | |
| tectonics | |
| SN | Middle Paleozoic (?Upper Devonian-Dinantian) orogenic era. May be used for the Northern Appalachians. Use Acadian for the ?Middle Cambrian age. Also search orogeny AND Acadian. Indexed with ages as applicable. |
| Acantharina | |
|---|---|
| BT | Invertebrata |
| .Protista | |
| ..Radiolaria | |
| ...Porulosida | |
| ....Acantharina | |
| RT | microfossils |
| SN | Suborder. Indexed with microfossils if applicable. |
| acanthite | |
|---|---|
| BT | sulfides |
| .acanthite | |
| RT | argentite |
| silver ores | |
| Acanthodes | |
|---|---|
| BT | Chordata |
| .Vertebrata | |
| ..Pisces | |
| ...Acanthodii | |
| ....Acanthodes | |
| SN | Genus. |
| Acanthodii | |
|---|---|
| BT | Chordata |
| .Vertebrata | |
| ..Pisces | |
| ...Acanthodii | |
| NT | Acanthodes |
| RT | Osteichthyes |
| Placodermi | |
| SN | Subclass. |
| acanthopores | |
|---|---|
| RT | Bryozoa |
| SN | Skeletal structures in stenolaemate Bryozoa. |
| Acapulco Meteorite | |
|---|---|
| BT | meteorites |
| .stony meteorites | |
| ..acapulcoite | |
| ...Acapulco Meteorite | |
| UF | El Quemado Meteorite |
| RT | chondrites |
| Guerrero Mexico | |
| Mexico | |
| SN | El Quemado Colony, Acapulco, Guerrero Mexico. Originally classified as an anomalous chondrite. Before 1981, also search Acapulco AND meteorites. |
| acapulcoite | |
|---|---|
| BT | meteorites |
| .stony meteorites | |
| ..acapulcoite | |
| NT | Acapulco Meteorite |
| RT | chondrites |
| achondrites | |
| SN | Type of primitive achondrites. Includes achondrites and chondrites as members. Indexed with achondrites or chondrites as applicable. |
| Acceglio Italy | |
|---|---|
| BT | Europe |
| .Southern Europe | |
| ..Italy | |
| ...Piemonte Italy | |
| ....Acceglio Italy | |
| SN | Village in NW Italy. |
| acceleration | |
|---|---|
| RT | accelerograms |
| accelerometers | |
| motions | |
| seismic response | |
| velocity | |
| SN | General term. Added to Thesaurus in 1993. |
| accelerator mass spectroscopy | |
|---|---|
| BT | spectroscopy |
| .mass spectroscopy | |
| ..accelerator mass spectroscopy | |
| RT | absolute age |
| C-14 | |
| Al-26 | |
| chemical analysis | |
| instruments | |
| Si-32 | |
| SN | Particle accelerator and mass spectrometer. May be used in dating using cosmogenic isotopes. Before 1993, also search AMS. Added to Thesaurus in 1993. |
| accelerograms | |
|---|---|
| RT | seismology |
| acceleration | |
| accelerometers | |
| earthquakes | |
| engineering geology | |
| SN | Used for data. For the instrument, use accelerometers. Also search acceleration. |
| accelerographs | |
|---|---|
| USE | accelerometers |
| accelerometers | |
|---|---|
| UF | accelerographs |
| RT | seismology |
| acceleration | |
| accelerograms | |
| instruments | |
| engineering geology | |
| SN | Used for the instrument. Use accelerograms for data. Added to Thesaurus in 1981. |
| accessory minerals | |
|---|---|
| RT | heavy minerals |
| minerals | |
| petrology | |
| SN | Before 1978, search minerals AND accessory. |
| Accomac County Virginia | |
|---|---|
| USE | Accomack County Virginia |
| Accomack County Virginia | |
|---|---|
| BT | United States |
| .Virginia | |
| ..Accomack County Virginia | |
| NT | Wachapreague Inlet |
| UF | Accomac County Virginia |
| SN | On the Delmarva Peninsula. |
| accommodation zones | |
|---|---|
| RT | block structures |
| decollement | |
| detachment faults | |
| extension tectonics | |
| faults | |
| hinge faults | |
| listric faults | |
| plate boundaries | |
| plate tectonics | |
| rift zones | |
| rifting | |
| tectonics | |
| transfer faults | |
| transform faults | |
| SN | Added to Thesaurus in 1995. |
| Accra Ghana | |
|---|---|
| BT | Africa |
| .West Africa | |
| ..Ghana | |
| ...Accra Ghana | |
| SN | City on the Gulf of Guinea. |
| accreting plate boundary | |
|---|---|
| UF | divergent plate boundaries |
| RT | plate boundaries |
| plate tectonics | |
| rifting | |
| accretion | |
| passive margins | |
| plate divergence | |
| sea-floor spreading | |
| SN | Added to Thesaurus in 1993. |
| accretion | |
|---|---|
| RT | accreting plate boundary |
| deposition | |
| Moon | |
| planetesimals | |
| planetology | |
| rifting | |
| sedimentation | |
| tectonics | |
| SN | Term used for sedimentation through 1977. After 1977, term includes use as genetic concept for the Moon and planets. |
| accretionary prisms | |
|---|---|
| USE | accretionary wedges |
| accretionary wedges | |
|---|---|
| UF | accretionary prisms |
| RT | tectonics |
| plate tectonics | |
| terranes | |
| underplating | |
| SN | Added to Thesaurus in 1989. |
| accumulation | |
|---|---|
| SN | As of 1981, no longer a valid term for GeoRef. Before 1981, used as a general term. |
| accumulation, petroleum | |
|---|---|
| USE | petroleum accumulation |
| accuracy | |
|---|---|
| RT | calibration |
| corrections | |
| efficiency | |
| errors | |
| measurement | |
| precision | |
| quality control | |
| registration | |
| reliability | |
| SN | Used as a general term. Also see precision. |
| Acer | |
|---|---|
| BT | Plantae |
| .Spermatophyta | |
| ..Angiospermae | |
| ...Dicotyledoneae | |
| ....Acer | |
| SN | Genus. |
| acetate | |
|---|---|
| BT | organic compounds |
| .acetate | |
| RT | acetic acid |
| esters | |
| SN | Compound derived from acetic acid. Added to Thesaurus in 1989. |
| acetic acid | |
|---|---|
| BT | organic compounds |
| .organic acids | |
| ..carboxylic acids | |
| ...acetic acid | |
| UF | ethanoic acid |
| RT | acetate |
| biochemistry | |
| SN | CH |
| acetylene | |
|---|---|
| BT | organic compounds |
| .hydrocarbons | |
| ..aliphatic hydrocarbons | |
| ...alkynes | |
| ....acetylene | |
| SN | Added to Thesaurus in 1989. |
| Acfer Meteorites | |
|---|---|
| BT | meteorites |
| .Acfer Meteorites | |
| RT | Algeria |
| CR chondrites | |
| SN | Large number of stones found strewn over area in S Algeria. Also search using truncation for individual stones e.g. Acfer 001. Meteorites from Tanezrouft or El Djouf areas have been related to some Acfer stones. Added to Thesaurus in 1995. |
| Acheulean | |
|---|---|
| USE | Acheulian |
| Acheulian | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Cenozoic | |
| ...Stone Age | |
| ....Paleolithic | |
| .....Acheulian | |
| UF | Acheulean |
| Acheullian | |
| RT | archaeology |
| SN | Archaeological classification. |
| Acheullian | |
|---|---|
| USE | Acheulian |
| acid mine drainage | |
|---|---|
| RT | acids |
| drainage | |
| environmental geology | |
| mine drainage | |
| mines | |
| pollution | |
| sulfuric acid | |
| SN | Before 1978, also search drainage AND mines. |
| acid precipitation | |
|---|---|
| USE | acid rain |
| acid rain | |
|---|---|
| BT | atmospheric precipitation |
| .rain | |
| ..acid rain | |
| UF | acid precipitation |
| acid rainfall | |
| RT | pollution |
| acidification | |
| critical load | |
| pH | |
| rainfall | |
| SN | Added to Thesaurus in 1985. |
| acid rainfall | |
|---|---|
| USE | acid rain |
| acid sulfate soils | |
|---|---|
| BT | soils |
| .acid sulfate soils | |
| Acidalia Planitia | |
|---|---|
| BT | Mars |
| .Acidalia Planitia | |
| SN | Low plain. |
| acidic | |
|---|---|
| SN | A valid index term through 1977. |
| acidic composition | |
|---|---|
| UF | silicic composition |
| RT | acids |
| pH | |
| acidic magmas | |
| felsic composition | |
| igneous rocks | |
| composition | |
| SN | Before 1978, also search acidic. Before 1985, also search silicic. |
| acidic magmas | |
|---|---|
| BT | magmas |
| .acidic magmas | |
| RT | acidic composition |
| SN | Added to Thesaurus in 1981. |
| acidification | |
|---|---|
| RT | acid rain |
| critical load | |
| petroleum engineering | |
| tertiary recovery | |
| SN | Added to Thesaurus in 1985. |
| acidity | |
|---|---|
| USE | pH |
| acids | |
|---|---|
| RT | acid mine drainage |
| acidic composition | |
| alanine | |
| amino acids | |
| carboxylic acids | |
| compounds | |
| DNA | |
| fatty acids | |
| fulvic acids | |
| humic acids | |
| hydrochloric acid | |
| hydrofluoric acid | |
| inorganic acids | |
| organic acids | |
| pH | |
| RNA | |
| silicic acid | |
| sulfuric acid | |
| SN | Use only when a more specific term is not known. |
| Ackley Granite | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Paleozoic | |
| ...Devonian | |
| ....Ackley Granite | |
| RT | Newfoundland Island |
| SN | S Newfoundland. Added to Thesaurus in 1989. |
| acmite | |
|---|---|
| USE | aegirine |
| Acoela | |
|---|---|
| BT | Invertebrata |
| .Mollusca | |
| ..Gastropoda | |
| ...Acoela | |
| Aconcagua Chile | |
|---|---|
| USE | Valparaiso Chile |
| acoustic emissions | |
|---|---|
| USE | acoustical emissions |
| acoustic logging | |
|---|---|
| USE | acoustical logging |
| acoustic methods | |
|---|---|
| USE | acoustical methods |
| acoustic waves | |
|---|---|
| USE | acoustical waves |
| acoustical | |
|---|---|
| SN | A valid index term through 1977. |
| acoustical emissions | |
|---|---|
| UF | acoustic emissions |
| emissions, acoustical | |
| RT | seismology |
| earthquakes | |
| acoustical waves | |
| avalanches | |
| precursors | |
| rock mechanics | |
| SN | Added to Thesaurus in 1985. |
| acoustical exploration | |
|---|---|
| SN | Use acoustical logging or acoustical methods. For economic geology, see exploration. |
| acoustical logging | |
|---|---|
| BT | well-logging |
| .acoustical logging | |
| UF | acoustic logging |
| RT | acoustical methods |
| borehole televiewers | |
| impedance | |
| seismic logging | |
| tube waves | |
| SN | Not a valid index term from 1975-1977. Before 1978, also search well-logging AND acoustical. |
| acoustical methods | |
|---|---|
| BT | geophysical methods |
| .acoustical methods | |
| NT | sonar methods |
| UF | acoustic methods |
| RT | acoustical logging |
| borehole televiewers | |
| impedance | |
| air guns | |
| backscattering | |
| Brillouin spectra | |
| deep-tow methods | |
| Doppler effect | |
| echo sounding | |
| eikonal equation | |
| geophones | |
| geophysical surveys | |
| GLORIA | |
| Green function | |
| hydrophones | |
| reflection methods | |
| refraction method | |
| SN | Also search acoustical. For surveys, search with geophysical surveys and an area. For surveys, also index geophysical surveys and the area. |
| acoustical properties | |
|---|---|
| RT | physical properties |
| properties | |
| seismology | |
| acoustical waves | |
|---|---|
| UF | acoustic waves |
| sonic waves | |
| sound waves | |
| RT | seismology |
| acoustical emissions | |
| impedance | |
| elastic waves | |
| waves | |
| SN | Also search acoustic AND waves. |
| Acqui Italy | |
|---|---|
| BT | Europe |
| .Southern Europe | |
| ..Italy | |
| ...Piemonte Italy | |
| ....Acqui Italy | |
| RT | Alessandria Italy |
| SN | Town in NW Italy. |
| acquisition, data | |
|---|---|
| USE | data acquisition |
| Acre Brazil | |
|---|---|
| BT | South America |
| .Brazil | |
| ..Acre Brazil | |
| SN | State in W Brazil. |
| Acreodi | |
|---|---|
| BT | Chordata |
| .Vertebrata | |
| ..Tetrapoda | |
| ...Mammalia | |
| ....Theria | |
| .....Eutheria | |
| ......Condylarthra | |
| .......Acreodi | |
| acritarchs | |
|---|---|
| BT | palynomorphs |
| .acritarchs | |
| NT | Baltisphaeridium |
| Hystrichosphaeridae | |
| RT | microfossils |
| Dinoflagellata | |
| SN | Hystrichosphaeridae is included here and under Dinoflagellata. Indexed with microfossils if applicable. |
| Acropora cervicornis | |
|---|---|
| BT | Invertebrata |
| .Coelenterata | |
| ..Anthozoa | |
| ...Zoantharia | |
| ....Scleractinia | |
| .....Acropora cervicornis | |
| SN | Species. |
| Acropora palmata | |
|---|---|
| BT | Invertebrata |
| .Coelenterata | |
| ..Anthozoa | |
| ...Zoantharia | |
| ....Scleractinia | |
| .....Acropora palmata | |
| SN | Species. |
| Actiniaria | |
|---|---|
| BT | Invertebrata |
| .Coelenterata | |
| ..Anthozoa | |
| ...Zoantharia | |
| ....Actiniaria | |
| SN | Order. |
| actinides | |
|---|---|
| BT | metals |
| .actinides | |
| NT | actinium |
| americium | |
| berkelium | |
| californium | |
| curium | |
| einsteinium | |
| fermium | |
| lawrencium | |
| mendelevium | |
| neptunium | |
| nobelium | |
| plutonium | |
| protactinium | |
| thorium | |
| uranium | |
| SN | Series of heavy, radioactive, metallic elements with atomic numbers 89 to 103. |
| Actinistia | |
|---|---|
| BT | Chordata |
| .Vertebrata | |
| ..Pisces | |
| ...Osteichthyes | |
| ....Sarcopterygii | |
| .....Crossopterygii | |
| ......Actinistia | |
| UF | Coelacanthini |
| SN | Suborder. |
| actinium | |
|---|---|
| BT | metals |
| .actinides | |
| ..actinium | |
| UF | Ac |
| Actinodontida | |
|---|---|
| BT | Invertebrata |
| .Mollusca | |
| ..Bivalvia | |
| ...Actinodontida | |
| UF | Modiomorphoida |
| actinolite | |
|---|---|
| BT | silicates |
| .chain silicates | |
| ..amphibole group | |
| ...clinoamphibole | |
| ....actinolite | |
| RT | actinolite facies |
| asbestos | |
| actinolite facies | |
|---|---|
| BT | facies |
| .actinolite facies | |
| RT | actinolite |
| metamorphic rocks | |
| Actinopterygii | |
|---|---|
| BT | Chordata |
| .Vertebrata | |
| ..Pisces | |
| ...Osteichthyes | |
| ....Actinopterygii | |
| NT | Chondrostei |
| Holostei | |
| Teleostei | |
| SN | Subclass. |
| action, frost | |
|---|---|
| USE | frost action |
| activation analysis | |
|---|---|
| UF | radioactivation analysis |
| RT | isotopes |
| chemical analysis | |
| analysis | |
| neutron activation analysis | |
| SN | Including field applications and instruments. Also search activation. |
| activation energy | |
|---|---|
| RT | energy |
| particles | |
| active faults | |
|---|---|
| BT | faults |
| .active faults | |
| RT | blind faults |
| creep | |
| seismic gaps | |
| active layer | |
|---|---|
| UF | annually thawed layer |
| layer, active | |
| mollisol | |
| RT | soils |
| permafrost | |
| taliks | |
| active margins | |
|---|---|
| RT | continental margin |
| plate boundaries | |
| plate convergence | |
| plate tectonics | |
| plates | |
| subduction zones | |
| underplating | |
| SN | Added to Thesaurus in 1985. |
| active tectonics | |
|---|---|
| USE | neotectonics |
| activity | |
|---|---|
| RT | geochemistry |
| reactivity | |
| actual age (absolute age) | |
|---|---|
| USE | absolute age |
| actualism | |
|---|---|
| USE | uniformitarianism |
| Acungui Group | |
|---|---|
| BT | Chronostratigraphic Units |
| .Precambrian | |
| ..Acungui Group | |
| RT | Brazil |
| Parana Brazil | |