SEDIS - Thesaurus
Th  | |
|---|---|
| USE | thorium |
| Th-228 | |
|---|---|
| BT | isotopes |
| .radioactive isotopes | |
| ..Th-228 | |
| BT | metals |
| .actinides | |
| ..thorium | |
| ...Th-228 | |
| SN | This term has multiple hierarchies. |
| Th-230 | |
|---|---|
| BT | isotopes |
| .radioactive isotopes | |
| ..Th-230 | |
| BT | metals |
| .actinides | |
| ..thorium | |
| ...Th-230 | |
| UF | ionium |
| RT | Io/Th |
| Io/U | |
| Th-232/Th-230 | |
| U-234/Th-230 | |
| U-238/Th-230 | |
| SN | Used for ionium. This term has multiple hierarchies. |
| Th-230/Ra-226 | |
|---|---|
| BT | isotopes |
| .radioactive isotopes | |
| ..Th-230/Ra-226 | |
| BT | metals |
| .actinides | |
| ..thorium | |
| ...Th-230/Ra-226 | |
| BT | metals |
| .alkaline earth metals | |
| ..radium | |
| ...Th-230/Ra-226 | |
| UF | Ra-226/Th-230 |
| SN | This term has multiple hierarchies. |
| Th-230/Th-232 | |
|---|---|
| USE | Th-232/Th-230 |
| Th-230/U-234 | |
|---|---|
| USE | U-234/Th-230 |
| Th-230/U-238 | |
|---|---|
| USE | U-238/Th-230 |
| Th-232 | |
|---|---|
| BT | isotopes |
| .radioactive isotopes | |
| ..Th-232 | |
| BT | metals |
| .actinides | |
| ..thorium | |
| ...Th-232 | |
| RT | Th-232/Th-230 |
| U-238/Th-232 | |
| SN | This term has multiple hierarchies. |
| Th-232/Th-230 | |
|---|---|
| BT | isotopes |
| .radioactive isotopes | |
| ..Th-232/Th-230 | |
| BT | metals |
| .actinides | |
| ..thorium | |
| ...Th-232/Th-230 | |
| UF | Th-230/Th-232 |
| RT | isotope ratios |
| Th-230 | |
| Th-232 | |
| SN | This term has multiple hierarchies. |
| Th-232/U-238 | |
|---|---|
| USE | U-238/Th-232 |
| Th-234 | |
|---|---|
| BT | isotopes |
| .radioactive isotopes | |
| ..Th-234 | |
| BT | metals |
| .actinides | |
| ..thorium | |
| ...Th-234 | |
| SN | This term has multiple hierarchies. |
| Th/Th | |
|---|---|
| RT | absolute age |
| isotope ratios | |
| Th/U | |
| thorium | |
| SN | Isotopic ratio used in age determination. |
| Th/U | |
|---|---|
| UF | thorium-uranium |
| U/Th | |
| uranium-thorium | |
| RT | absolute age |
| isotope ratios | |
| HIMU | |
| thorium | |
| uranium | |
| U/Th/Pb | |
| Th/Th | |
| SN | Isotopic ratio used in age determination. |
| Thalassinoides | |
|---|---|
| BT | ichnofossils |
| .Thalassinoides | |
| thalenite | |
|---|---|
| BT | silicates |
| .orthosilicates | |
| ..sorosilicates | |
| ...thalenite | |
| thallium | |
|---|---|
| BT | metals |
| .thallium | |
| UF | Tl |
| thallophytes | |
|---|---|
| RT | algae |
| bacteria | |
| Bryophyta | |
| cyanobacteria | |
| fungi | |
| lichens | |
| Plantae | |
| prokaryotes | |
| Pteropsida | |
| SN | Before 1998, algae, bacteria, fungi, lichens, and prokaryotes were narrower terms; Plantae was a broader term. |
| thalwegs | |
|---|---|
| RT | channels |
| fluvial currents | |
| ground water | |
| stream transport | |
| streams | |
| SN | Added to Thesaurus in 1989. |
| Thamama Group | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Mesozoic | |
| ...Cretaceous | |
| ....Lower Cretaceous | |
| .....Thamama Group | |
| RT | United Arab Emirates |
| Saudi Arabia | |
| Oman | |
| Qatar | |
| SN | Arabian Peninsula. Added to Thesaurus in 1989. |
| Thames Estuary | |
|---|---|
| RT | England |
| Essex England | |
| Isle of Sheppey | |
| Kent England | |
| London England | |
| SN | The broad tidal mouth of the Thames River in SE England. Also search Thames AND England. May also occur in other locations. Indexed with counties and/or countries and/or region as applicable. |
| Thames River | |
|---|---|
| UF | The Thames |
| RT | England |
| Ontario | |
| Connecticut | |
| New London County Connecticut | |
| Lake Saint Clair | |
| Essex England | |
| Kent England | |
| Isle of Sheppey | |
| London England | |
| SN | Flows from the E slope of the Cotswold Hills E to the North Sea in SE England. Also in SE Connecticut which flows into Long Island Sound. Also in SE Ontario which flows into Lake Saint Clair. Also search Thames in combination with state or country. Indexe |
| thanatocenoses | |
|---|---|
| UF | death assemblages |
| taphocenoses | |
| taphocoenosis | |
| thanatocoenosis | |
| RT | paleontology |
| biocenoses | |
| taphonomy | |
| thanatocoenosis | |
|---|---|
| USE | thanatocenoses |
| Thanetian | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Cenozoic | |
| ...Paleogene | |
| ....Paleocene | |
| .....Thanetian | |
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Cenozoic | |
| ...Paleogene | |
| ....Paleocene | |
| .....upper Paleocene | |
| ......Thanetian | |
| SN | Europe. Above Montian, below Ypresian (Eocene). |
| Tharsis | |
|---|---|
| BT | Mars |
| .Tharsis | |
| RT | Arsia Mons |
| Tharsis Montes | |
| Ascraeus Mons | |
| SN | As of 1978, term is restricted to morphologic features on Mars. Before 1978 term was also used for village in Spain. |
| Tharsis Montes | |
|---|---|
| BT | Mars |
| .Tharsis Montes | |
| RT | Arsia Mons |
| Tharsis | |
| Ascraeus Mons | |
| SN | In Tharsis region includes Ascraeus Mons, Pavonis Mons, and Arsia Mons. Added to Thesaurus in 1993. |
| thaumasite | |
|---|---|
| BT | carbonates |
| .thaumasite | |
| BT | silicates |
| .orthosilicates | |
| ..nesosilicates | |
| ...thaumasite | |
| BT | sulfates |
| .thaumasite | |
| SN | This term has multiple hierarchies. |
| thawing | |
|---|---|
| RT | freezing |
| frost action | |
| glacial geology | |
| ice | |
| permafrost | |
| snow | |
| taliks | |
| Thayer County Nebraska | |
|---|---|
| BT | United States |
| .Nebraska | |
| ..Thayer County Nebraska | |
| Thaynes Formation | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Mesozoic | |
| ...Triassic | |
| ....Lower Triassic | |
| .....Thaynes Formation | |
| RT | Idaho |
| Utah | |
| Wyoming | |
| Montana | |
| SN | Consists of limestone, calcareous sandstone, sandstone, shale, and in the middle, red shale member. In SE Idaho, SW Montana, NE Utah, and SW Wyoming. |
| The Banks | |
|---|---|
| USE | Outer Banks |
| The Coorong | |
|---|---|
| USE | Coorong Lagoon |
| The Geysers | |
|---|---|
| BT | United States |
| .California | |
| ..The Geysers | |
| UF | Geysers, The |
| RT | geothermal fields |
| Sonoma County California | |
| SN | Eight miles NE of Geyserville in Sonoma County, W California. |
| The Great Oasis | |
|---|---|
| USE | Kharga Oasis |
| The Himalaya | |
|---|---|
| USE | Himalayas |
| The Rand | |
|---|---|
| SN | Not a valid term for GeoRef. See Witwatersrand for basin of South Africa or Rand Mountains of California as applicable. |
| The Spessart | |
|---|---|
| USE | Spessart |
| The Thames | |
|---|---|
| USE | Thames River |
| The Weald | |
|---|---|
| BT | Europe |
| .Western Europe | |
| ..United Kingdom | |
| ...Great Britain | |
| ....England | |
| .....The Weald | |
| UF | Weald |
| Weald region | |
| RT | Kent England |
| Sussex England | |
| Surrey England | |
| SN | Wooded region in Kent, Surrey, and Sussex counties of SE England. |
| Thebes Formation | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Cenozoic | |
| ...Paleogene | |
| ....Eocene | |
| .....lower Eocene | |
| ......Thebes Formation | |
| RT | Egypt |
| SN | E Egypt. Overlies Esna Shale; underlies Minia Formation. Added to Thesaurus in 1989. |
| Thecamoeba | |
|---|---|
| BT | Invertebrata |
| .Protista | |
| ..Thecamoeba | |
| RT | microfossils |
| SN | Indexed with microfossils if applicable. |
| Thecideidae | |
|---|---|
| BT | Invertebrata |
| .Brachiopoda | |
| ..Articulata | |
| ...Thecideidina | |
| ....Thecideidae | |
| Thecideidina | |
|---|---|
| BT | Invertebrata |
| .Brachiopoda | |
| ..Articulata | |
| ...Thecideidina | |
| NT | Thecideidae |
| Thecodontia | |
|---|---|
| BT | Chordata |
| .Vertebrata | |
| ..Tetrapoda | |
| ...Reptilia | |
| ....Diapsida | |
| .....Archosauria | |
| ......Thecodontia | |
| SN | Order. |
| Theiss River | |
|---|---|
| USE | Tisza River |
| Thellier Method | |
|---|---|
| RT | magnetic field |
| methods | |
| paleomagnetism | |
| remanent magnetization | |
| thermoremanent magnetization | |
| SN | Added to Thesaurus in 1989. |
| thematic mapper | |
|---|---|
| RT | airborne methods |
| digital cartography | |
| geophysical surveys | |
| instruments | |
| Landsat | |
| mosaics | |
| multispectral analysis | |
| multispectral scanner | |
| remote sensing | |
| satellite methods | |
| geophysical methods | |
| SN | Added to Thesaurus in 1985. |
| thenardite | |
|---|---|
| BT | sulfates |
| .thenardite | |
| theoretical models | |
|---|---|
| UF | conceptual models |
| RT | models |
| SN | Used for discussion of a model which is not a mathematical model or a physical model, but which exists in the form of a drawing, diagram, chart or description. Added to Thesaurus in 1985. |
| theoretical seismograms | |
|---|---|
| BT | seismograms |
| .theoretical seismograms | |
| SN | Added to Thesaurus in 1981. |
| theoretical studies | |
|---|---|
| UF | studies, theoretical |
| RT | experimental studies |
| laboratory studies | |
| theory | |
|---|---|
| SN | A valid term through mid-1978. Use theoretical studies. |
| Thera | |
|---|---|
| BT | Mediterranean region |
| .Aegean Islands | |
| ..Greek Aegean Islands | |
| ...Cyclades | |
| ....Thera | |
| UF | Santorini |
| Thira | |
| RT | Santorin |
| SN | Volcanic island. The southernmost of the Cyclades in the Aegean Sea. Also search Santorin. This term has multiple hierarchies. |
| Therapsida | |
|---|---|
| BT | Synapsida |
| .Therapsida | |
| NT | Cynodontia |
| Dicynodontia | |
| SN | Order. |
| Theria | |
|---|---|
| BT | Chordata |
| .Vertebrata | |
| ..Tetrapoda | |
| ...Mammalia | |
| ....Theria | |
| NT | Eutheria |
| Metatheria | |
| Pantotheria | |
| Symmetrodonta | |
| SN | Subclass. |
| thermal | |
|---|---|
| SN | A valid term through 1977. |
| thermal alteration | |
|---|---|
| RT | alteration |
| color alteration index | |
| hydrothermal alteration | |
| magmatism | |
| thermal effects | |
| SN | Before 1978, also search thermal AND alteration. |
| thermal alteration index | |
|---|---|
| USE | color alteration index |
| thermal anal |
|---|
| thermal analysis | |
|---|---|
| RT | analysis |
| chemical analysis | |
| clay mineralogy | |
| differential thermal analysis | |
| DTA data | |
| electron microscopy | |
| endothermic reactions | |
| interlaboratory comparison | |
| sample preparation | |
| spectroscopy | |
| standard materials | |
| TGA data | |
| thermal analysis data | |
| thermogravimetric anal | |
| SN | Used for methodology and not for data. For data, use thermal analysis data. Indexed with also the specific type of analysis if possible [e.g. differential thermal analysis, thermogravimetric analysis, thermomagnetic analysis]. |
| thermal analysis data | |
|---|---|
| UF | thermal data |
| RT | Brillouin spectra |
| thermal analysis | |
| SN | Used for data and not for methodology. Added to Thesaurus in 1985. |
| thermal anomalies | |
|---|---|
| UF | temperature anomaly |
| RT | anomalies |
| geothermal fields | |
| heat flow | |
| hot springs | |
| hot spots | |
| SN | Used as a general term. Use more specific terms (e.g. hot spots) if applicable. Added to Thesaurus in 1989. |
| thermal aureole | |
|---|---|
| USE | aureoles |
| thermal circulation | |
|---|---|
| RT | circulation |
| ocean circulation | |
| SN | Before 1978, also search oceans AND circulation AND thermal. |
| thermal conductivity | |
|---|---|
| RT | conductivity |
| electrical conductivity | |
| geothermal gradient | |
| heat flow | |
| measurement | |
| specific heat | |
| thermal diffusivity | |
| thermal inertia | |
| SN | Before 1976, also search conductivity. |
| thermal data | |
|---|---|
| USE | thermal analysis data |
| thermal demagnetization | |
|---|---|
| BT | demagnetization |
| .thermal demagnetization | |
| RT | geophysics |
| magnetization | |
| paleomagnetism | |
| remanent magnetization | |
| SN | Added to Thesaurus in 1981. |
| thermal diffusivity | |
|---|---|
| UF | diffusivity, thermal |
| RT | heat flow |
| thermal conductivity | |
| diffusivity | |
| thermal discharge | |
|---|---|
| USE | thermal pollution |
| thermal effects | |
|---|---|
| RT | effects |
| thermal alteration | |
| SN | Added to Thesaurus in 1981. |
| thermal emission | |
|---|---|
| UF | emission, thermal |
| RT | remote sensing |
| infrared methods | |
| emissivity | |
| thermal emissivity | |
|---|---|
| USE | emissivity |
| thermal energy storage | |
|---|---|
| USE | heat storage |
| thermal evolution | |
|---|---|
| SN | As of 1993, use thermal maturity for petroleum or thermal alteration or thermal history. |
| thermal expansion | |
|---|---|
| UF | expansion, thermal |
| RT | properties |
| stress | |
| strain | |
| expansive materials | |
| thermodynamic properties | |
| expansion | |
| thermal properties | |
| thermomechanical properties | |
| SN | Added to Thesaurus in 1995. |
| thermal gradient | |
|---|---|
| SN | Not a valid term for GeoRef. See geothermal gradient if applicable. |
| thermal history | |
|---|---|
| RT | geosynclines |
| P-T-t paths | |
| paleotemperature | |
| temperature | |
| thermal maturity | |
| thermal regime | |
| thermochronology | |
| SN | Before 1993, also search thermal evolution. |
| thermal inertia | |
|---|---|
| RT | heat flow |
| specific heat | |
| thermal conductivity | |
| thermal properties | |
| thermodynamic properties | |
| SN | Added to Thesaurus in 1985. |
| Thermal Infrared Multispectral Scanner | |
|---|---|
| RT | infrared methods |
| multispectral scanner | |
| remote sensing | |
| thermal ionization mass spectroscopy | |
| SN | Before 1988, also search TIMS and remote sensing. For multispectral scanner data use Thermal Infrared Multispectral Scanner data. Indexed with infrared methods if applicable. |
| thermal ionization mass spectroscopy | |
|---|---|
| BT | spectroscopy |
| .mass spectroscopy | |
| ..thermal ionization mass spectroscopy | |
| RT | absolute age |
| heat flow | |
| Thermal Infrared Multispectral Scanner | |
| uranium disequilibrium | |
| SN | Before 1998, also search TIMS and (spectroscopy or absolute age). For the method. For data, use thermal ionization mass spectra. Added to Thesaurus in 1998. |
| thermal maturation | |
|---|---|
| USE | thermal maturity |
| thermal maturity | |
|---|---|
| UF | thermal maturation |
| RT | maturity |
| biomarkers | |
| petroleum | |
| color alteration index | |
| thermal history | |
| SN | Before 1993, also search thermal evolution and petroleum. Added to Thesaurus in 1985. |
| thermal metamorphism | |
|---|---|
| BT | metamorphism |
| .thermal metamorphism | |
| UF | thermometamorphism |
| SN | Not a valid index term through 1977. Before 1978, also search metamorphism AND thermal. |
| thermal methods | |
|---|---|
| SN | Not a valid GeoRef index term after 1971. Used in subfiles G and N. See heat flow or thermal analysis. |
| thermal pollution | |
|---|---|
| UF | thermal discharge |
| RT | pollution |
| waste disposal | |
| SN | Before 1978, also search pollution AND thermal. |
| thermal recovery | |
|---|---|
| UF | heat treatment |
| RT | tertiary recovery |
| enhanced recovery | |
| recovery | |
| SN | Added to Thesaurus in 1985. |
| thermal regime | |
|---|---|
| RT | geothermal systems |
| heat flow | |
| hydrogeology | |
| thermal history | |
| engineering geology | |
| SN | Added to Thesaurus in 1981. |
| thermal remanent magnetization | |
|---|---|
| USE | thermoremanent magnetization |
| thermal springs | |
|---|---|
| USE | hot springs |
| thermal surveys | |
|---|---|
| USE | heat flow |
| thermochemical properties | |
|---|---|
| RT | calorimetry |
| chemical properties | |
| properties | |
| thermal properties | |
| geochemistry | |
| thermochemical remanent magnetization | |
|---|---|
| BT | magnetization |
| .remanent magnetization | |
| ..thermochemical remanent magnetization | |
| RT | paleomagnetism |
| SN | Added to Thesaurus in 1981. |
| thermochronology | |
|---|---|
| RT | absolute age |
| annealing | |
| Ar/Ar | |
| cooling | |
| crystallization | |
| diffusion | |
| exposure age | |
| fission tracks | |
| fission-track dating | |
| geochronology | |
| geologic thermometry | |
| He/He | |
| meteorites | |
| P-T conditions | |
| P-T-t paths | |
| Rb/Sr | |
| relative age | |
| Sm/Nd | |
| stratigraphy | |
| thermal history | |
| tectonics | |
| SN | Determination of temperature-time-depth histories in metamorphic rocks. Techniques may include a combination of several of the isotopic techniques of absolute age to measure differential diffusion rates in minerals, or fission-track techniques. Before 199 |
| thermocline | |
|---|---|
| RT | geothermal gradient |
| lakes | |
| ocean circulation | |
| temperature | |
| SN | Added to Thesaurus in 1989. |
| thermoelastic properties | |
|---|---|
| RT | elastic properties |
| mechanical properties | |
| physical properties | |
| properties | |
| thermal properties | |
| SN | Added to Thesaurus in 1989. |
| thermography | |
|---|---|
| USE | differential thermal analysis |
| thermogravimetric anal |
|---|
| thermogravimetric analysis | |
|---|---|
| UF | thermogravimetry |
| RT | chemical analysis |
| analysis | |
| differential thermal analysis | |
| thermal analysis | |
| TGA data | |
| thermogravimetry | |
|---|---|
| USE | thermogravimetric analysis |
| thermohaline circula |
|---|
| thermohaline circulation | |
|---|---|
| RT | circulation |
| ocean circulation | |
| SN | Before 1978, also search oceans AND circulation AND thermohaline. |
| thermokarst | |
|---|---|
| UF | cryokarst |
| RT | glacial geology |
| permafrost | |
| geomorphology | |
| karst | |
| frost action | |
| periglacial features | |
| ground ice | |
| suffosion | |
| pseudokarst | |
| thermoluminescence | |
|---|---|
| RT | fluorescence |
| geochronology | |
| irradiation | |
| luminescence | |
| relative age | |
| thermomagnetic analysis | |
|---|---|
| RT | analysis |
| thermal analysis | |
| thermomechanical properties | |
|---|---|
| UF | thermophysical properties |
| RT | physical properties |
| mechanical properties | |
| thermodynamic properties | |
| thermal expansion | |
| thermal properties | |
| SN | Added to Thesaurus in 1985. |
| thermometamorphism | |
|---|---|
| USE | thermal metamorphism |
| thermometry | |
|---|---|
| SN | A valid term through mid-1978. Use geologic thermometry. |
| thermonatrite | |
|---|---|
| BT | carbonates |
| .thermonatrite | |
| thermophilic taxa | |
|---|---|
| RT | bacteria |
| faunal studies | |
| floral studies | |
| hydrothermal conditions | |
| hydrothermal vents | |
| living taxa | |
| ocean floors | |
| SN | Indexed with specific type. Added to Thesaurus in 1998. |
| thermophysical properties | |
|---|---|
| USE | thermomechanical properties |
| thermoremanence | |
|---|---|
| USE | thermoremanent magnetization |
| Theropoda | |
|---|---|
| BT | Chordata |
| .Vertebrata | |
| ..Tetrapoda | |
| ...Reptilia | |
| ....Diapsida | |
| .....Archosauria | |
| ......Saurischia | |
| .......Theropoda | |
| NT | Carnosauria |
| RT | Smilodon |
| SN | Suborder. This term has multiple hierarchies. |
| theses | |
|---|---|
| UF | dissertations |
| RT | education |
| publications | |
| monographs | |
| SN | Added to Thesaurus in 1982. |
| Thessaloniki Greece | |
|---|---|
| USE | Salonika Greece |
| Thessaly Greece | |
|---|---|
| BT | Europe |
| .Southern Europe | |
| ..Greece | |
| ...Thessaly Greece | |
| RT | Pindus Mountains |
| Olympus | |
| Othrys | |
| SN | Administrative region in E central Greece. |
| Thetford Mines | |
|---|---|
| BT | Canada |
| .Eastern Canada | |
| ..Quebec | |
| ...Thetford Mines | |
| RT | mines |
| asbestos deposits | |
| SN | City and site of asbestos mines about 50 miles S of Quebec City in S Quebec. Also search Thetford AND Quebec. |
| Thetis Regio | |
|---|---|
| BT | Venus |
| .Aphrodite Terra | |
| ..Thetis Regio | |
| SN | Highland massif, W Aphrodite Terra. |
| thick-skinned tectonics | |
|---|---|
| BT | tectonics |
| .thick-skinned tectonics | |
| RT | basement tectonics |
| thrust faults | |
| neotectonics | |
| crustal thickening | |
| thin-skinned tectonics | |
| SN | Added to Thesaurus in 1998. |
| thickness | |
|---|---|
| RT | crust |
| crustal thickening | |
| crustal thinning | |
| ice sheets | |
| isochores | |
| thin sections | |
|---|---|
| RT | cross sections |
| electron microscopy | |
| microfacies | |
| microscope methods | |
| petrography | |
| polished sections | |
| samples | |
| thin-skin tectonics | |
|---|---|
| USE | thin-skinned tectonics |
| thin-skinned tectonics | |
|---|---|
| BT | tectonics |
| .thin-skinned tectonics | |
| UF | thin-skin tectonics |
| RT | crust |
| tectonophysics | |
| thick-skinned tectonics | |
| crustal thinning | |
| SN | Added to Thesaurus in 1989. |
| Thiobacillus ferrooxidans | |
|---|---|
| BT | bacteria |
| .Thiobacillus ferrooxidans | |
| RT | microfossils |
| biodegradation | |
| oxidation | |
| SN | Species. For paleontologic studies, index microfossils. |
| Thira | |
|---|---|
| USE | Thera |
| Third World | |
|---|---|
| USE | developing countries |
| thixotropy | |
|---|---|
| RT | clay |
| colloidal materials | |
| gels | |
| mechanical properties | |
| properties | |
| soil mechanics | |
| strength | |
| engineering geology | |
| SN | Added to Thesaurus in 1982. |
| tholeiite | |
|---|---|
| BT | igneous rocks |
| .volcanic rocks | |
| ..basalts | |
| ...tholeiite | |
| RT | ocean-island basalts |
| tholeiitic composition | |
| olivine tholeiite | |
| tholeiitic basalt | |
|---|---|
| BT | igneous rocks |
| .volcanic rocks | |
| ..basalts | |
| ...tholeiitic basalt | |
| tholeiitic composition | |
|---|---|
| RT | basalts |
| composition | |
| igneous rocks | |
| tholeiite | |
| SN | Before 1978, search tholeiitic. |
| tholeiitic dolerite | |
|---|---|
| BT | igneous rocks |
| .plutonic rocks | |
| ..diabase | |
| ...tholeiitic dolerite | |
| Thomar Portugal | |
|---|---|
| USE | Tomar Portugal |
| Thomas County Georgia | |
|---|---|
| BT | United States |
| .Georgia | |
| ..Thomas County Georgia | |
| Thomas County Kansas | |
|---|---|
| BT | United States |
| .Kansas | |
| ..Thomas County Kansas | |
| Thomas County Nebraska | |
|---|---|
| BT | United States |
| .Nebraska | |
| ..Thomas County Nebraska | |
| Thomas Range | |
|---|---|
| BT | United States |
| .Utah | |
| ..Thomas Range | |
| RT | Tooele County Utah |
| Juab County Utah | |
| Spor Mountain | |
| SN | W Utah. Indexed with counties as applicable. Added to Thesaurus in 1981. |
| Thompson nickel belt | |
|---|---|
| BT | Canada |
| .Western Canada | |
| ..Manitoba | |
| ...Thompson nickel belt | |
| RT | metallogenic provinces |
| SN | Metallogenic province, N Manitoba. Added to Thesaurus in 1985. |
| thomsenolite | |
|---|---|
| BT | halides |
| .fluorides | |
| ..thomsenolite | |
| Thomson Formation | |
|---|---|
| BT | Chronostratigraphic Units |
| .Precambrian | |
| ..Proterozoic | |
| ...Paleoproterozoic | |
| ....Thomson Formation | |
| UF | Thomson Slate |
| RT | Wisconsin |
| Minnesota | |
| Animikie Group | |
| Virginia Formation | |
| SN | NE Minnesota and NW Wisconsin. Includes the slate which has been referred to in literature as Thomson, Saint Louis, Cloquet, and Carlton slates. And which has usually been considered an equivalent of the Animikie-Virginia Slate of the Mesabi Range. In NE |
| Thomson Slate | |
|---|---|
| USE | Thomson Formation |
| Thomson-Haskell analysis | |
|---|---|
| RT | analysis |
| seismology | |
| SN | Added to Thesaurus in 1981. |
| thomsonite | |
|---|---|
| BT | silicates |
| .framework silicates | |
| ..zeolite group | |
| ...thomsonite | |
| thorianite | |
|---|---|
| BT | oxides |
| .thorianite | |
| thorite | |
|---|---|
| BT | silicates |
| .orthosilicates | |
| ..nesosilicates | |
| ...thorite | |
| thorium | |
|---|---|
| BT | metals |
| .actinides | |
| ..thorium | |
| NT | Th-228 |
| Th-230 | |
| Th-230/Ra-226 | |
| Th-232 | |
| Th-232/Th-230 | |
| Th-234 | |
| U-234/Th-230 | |
| U-238/Th-230 | |
| U-238/Th-232 | |
| UF | Th |
| RT | Io/Th |
| Io/U | |
| isotopes | |
| Pb/Th | |
| HIMU | |
| Th/U | |
| U/Th/Pb | |
| thorium ores | |
| Th/Th | |
| SN | Chemical element. Use thorium ores for thorium as a commodity. |
| thorium ores | |
|---|---|
| BT | metal ores |
| .thorium ores | |
| RT | monazite deposits |
| thorium | |
| thorium-lead | |
|---|---|
| USE | Pb/Th |
| thorium-uranium | |
|---|---|
| USE | Th/U |
| Thorn Poland | |
|---|---|
| USE | Torun Poland |
| thoron | |
|---|---|
| USE | Rn-222 |
| thortveitite | |
|---|---|
| BT | silicates |
| .orthosilicates | |
| ..sorosilicates | |
| ...thortveitite | |
| Thrace | |
|---|---|
| BT | Europe |
| .Thrace | |
| NT | Greek Thrace |
| RT | Turkey |
| Greece | |
| SN | Administrative region in extreme NE Greece (Western Thrace), and all of Turkey in Europe (Eastern Thrace). Indexed with countries as applicable. |
| Three Forks Montana | |
|---|---|
| BT | United States |
| .Montana | |
| ..Gallatin County Montana | |
| ...Three Forks Montana | |
| SN | Town in SW Montana. |
| Three Gorges, Yangtze | |
|---|---|
| USE | Yangtze Three Gorges |
| Three Rivers | |
|---|---|
| SN | Not a valid term for GeoRef. See Sanjiang for region in China. |
| three-component seismographs | |
|---|---|
| BT | seismographs |
| .three-component seismographs | |
| RT | PANDA |
| SN | Added to Thesaurus in 1981. |
| three-dimensional methods | |
|---|---|
| RT | boreholes |
| geophysical surveys | |
| prestack migration | |
| seismic methods | |
| techniques | |
| geophysical methods | |
| SN | Also search three-dimensional with methods or techniques. Search with area for surveys. For surveys, also index geophysical surveys and the area. Added to Thesaurus in 1993. |
| three-dimensional models | |
|---|---|
| RT | asperities |
| computer animation | |
| four-dimensional models | |
| mathematical models | |
| models | |
| MODFLOW | |
| MODPATH | |
| one-dimensional models | |
| seismology | |
| two-dimensional models | |
| visualization | |
| SN | Before 1978, search three-dimensional AND models. |
| Throckmorton County Texas | |
|---|---|
| BT | United States |
| .Texas | |
| ..Throckmorton County Texas | |
| thrombolites | |
|---|---|
| BT | sedimentary structures |
| .biogenic structures | |
| ..thrombolites | |
| RT | algal structures |
| stromatolites | |
| SN | Added to Thesaurus in 1993. |
| thrust | |
|---|---|
| SN | A valid term through 1977. After 1977, see thrust faults. After 1988, also see thrust sheets. |
| thrust faults | |
|---|---|
| BT | faults |
| .thrust faults | |
| UF | reverse slip faults |
| thrust slip faults | |
| thrusts and thrusting | |
| RT | overthrust faults |
| fold and thrust belts | |
| thick-skinned tectonics | |
| duplexes | |
| ramps | |
| compression tectonics | |
| crustal shortening | |
| triangle zones | |
| reverse faults | |
| imbricate tectonics | |
| thrust sheets | |
| foreland basins | |
| step faults | |
| SN | Before 1978, also search faults AND thrust. See overthrust faults; compression tectonics. |
| thrust plates | |
|---|---|
| USE | thrust sheets |
| thrust sheets | |
|---|---|
| UF | thrust plates |
| RT | tectonics |
| faults | |
| fold and thrust belts | |
| thrust faults | |
| neotectonics | |
| piggyback basins | |
| SN | Added to Thesaurus in 1989. |
| thrust slip faults | |
|---|---|
| USE | thrust faults |
| thrusts and thrusting | |
|---|---|
| USE | thrust faults |
| Thule Greenland | |
|---|---|
| BT | Arctic region |
| .Greenland | |
| ..Thule Greenland | |
| SN | Settlement on coast of Hayes Peninsula N of Cape York in NW Greenland. U.S. Air Force base nearby. |
| thulium | |
|---|---|
| BT | metals |
| .rare earths | |
| ..thulium | |
| UF | Tm |
| Thunder Bay | |
|---|---|
| BT | Canada |
| .Eastern Canada | |
| ..Ontario | |
| ...Thunder Bay | |
| RT | Lake Superior |
| Thunder Bay District Ontario | |
| SN | Refers only to the inlet of NW Lake Superior. For the city on the bay, see Thunder Bay Ontario. |
| Thunder Bay District Ontario | |
|---|---|
| BT | Canada |
| .Eastern Canada | |
| ..Ontario | |
| ...Thunder Bay District Ontario | |
| NT | Manitouwadge Ontario |
| Marshall Lake | |
| Northern Light Lake | |
| Thunder Bay Ontario | |
| UF | District of Thunder Bay |
| RT | Michipicoten Island |
| Thunder Bay | |
| SN | N Ontario. |
| Thunder Bay Ontario | |
|---|---|
| BT | Canada |
| .Eastern Canada | |
| ..Ontario | |
| ...Thunder Bay District Ontario | |
| ....Thunder Bay Ontario | |
| SN | Refers only to the city on the bay. For the inlet of NW Lake Superior, see Thunder Bay. |
| thunder eggs | |
|---|---|
| USE | geodes |
| thunderstorms | |
|---|---|
| SN | As of 1993, no longer a valid term for GeoRef. Usually out-of-scope. Used with meteorology. After 1993, see storms. |
| Thur Valley | |
|---|---|
| BT | Europe |
| .Central Europe | |
| ..Switzerland | |
| ...Thur Valley | |
| SN | River valley SSW of Lake Constance extending to the Rhine River. Also search Thur River. |
| Thuringer Wald | |
|---|---|
| USE | Thuringian Forest |
| Thuringia Basin | |
|---|---|
| USE | Thuringian Basin |
| Thuringia Germany | |
|---|---|
| BT | Europe |
| .Central Europe | |
| ..Germany | |
| ...Thuringia Germany | |
| NT | Erfurt Germany |
| Gera Germany | |
| Ruhla Germany | |
| Schlotheim Germany | |
| Schneeberg Germany | |
| Schwarzburg Anticlinorium | |
| Steinach Germany | |
| Taubach Germany | |
| Weimar Germany | |
| RT | Rhon Mountains |
| Saale River | |
| Weisse Elster Basin | |
| Thuringian Forest | |
| Geisel Valley | |
| Werra River | |
| Kyffhauser Range | |
| Saxony-Thuringia | |
| Vogtland | |
| Unstrut River | |
| Thuringian Basin | |
| Thuringian Hills | |
| Thuringian Massif | |
| SN | State in central Germany. Includes the Thuringian Forest. Before 1993, also search Erfurt Bezirk or Gera Bezirk if applicable. |
| Thuringian | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Paleozoic | |
| ...Permian | |
| ....Thuringian | |
| RT | Saxothuringian |
| SN | Added to Thesaurus in 1981. |
| Thuringian Basin | |
|---|---|
| BT | Europe |
| .Central Europe | |
| ..Germany | |
| ...Thuringian Basin | |
| UF | Thuringia Basin |
| RT | Thuringia Germany |
| SN | Thuringian Forest region in Thuringia. Indexed with states as applicable. |
| Thuringian Forest | |
|---|---|
| BT | Europe |
| .Central Europe | |
| ..Germany | |
| ...Thuringian Forest | |
| UF | Thuringer Wald |
| RT | Thuringia Germany |
| Franconian Forest | |
| Ruhla Germany | |
| Steinach Germany | |
| SN | Forested mountain range extending NW-SE in Thuringia. |
| Thuringian Hills | |
|---|---|
| BT | Europe |
| .Central Europe | |
| ..Germany | |
| ...Thuringian Hills | |
| RT | Thuringia Germany |
| SN | Region in Germany. Indexed with states as applicable. Added to Thesaurus in 1981. |
| Thuringian Massif | |
|---|---|
| BT | Europe |
| .Central Europe | |
| ..Germany | |
| ...Thuringian Massif | |
| RT | Thuringia Germany |
| SN | Region in Germany. Indexed with states as applicable. Added to Thesaurus in 1981. |
| Thurston County Nebraska | |
|---|---|
| BT | United States |
| .Nebraska | |
| ..Thurston County Nebraska | |
| SN | NE Nebraska. |
| Thurston County Washington | |
|---|---|
| BT | United States |
| .Washington | |
| ..Thurston County Washington | |
| NT | Tono Washington |
| SN | W Washington. |
| Thysanoptera | |
|---|---|
| BT | Invertebrata |
| .Arthropoda | |
| ..Mandibulata | |
| ...Insecta | |
| ....Pterygota | |
| .....Neoptera | |
| ......Exopterygota | |
| .......Thysanoptera | |
| UF | Thysanopteroida |
| SN | Order. |
| Thysanopteroida | |
|---|---|
| USE | Thysanoptera |
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