Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
Er  | |
|---|---|
| USE | erbium |
| Er Rif | |
|---|---|
| USE | Rif |
| Er Riff | |
|---|---|
| USE | Rif |
| Erath County Texas | |
|---|---|
| BT | United States |
| .Texas | |
| ..Erath County Texas | |
| Eratosthenian | |
|---|---|
| RT | Moon |
| SN | Lunar stratigraphy. Eratosthenian rocks are older than those of the Copernican System but younger than those of the Imbrian System. |
| erbium | |
|---|---|
| BT | metals |
| .rare earths | |
| ..erbium | |
| UF | Er |
| Erduos Basin | |
|---|---|
| USE | Ordos Basin |
| Erevan Armenia | |
|---|---|
| USE | Yerevan Armenia |
| Erfurt Bezirk | |
|---|---|
| SN | No longer a valid term for GeoRef. See Thuringia Germany. Used for the district in SW East Germany. |
| Erfurt Germany | |
|---|---|
| BT | Europe |
| .Central Europe | |
| ..Germany | |
| ...Thuringia Germany | |
| ....Erfurt Germany | |
| SN | City in Thuringia, central Germany. As of 1981, Erfurt refers to only the city in Germany. Before 1981, it also included the East German district. |
| ergroup#Bluebell Mine#Bluesky Formation#Bonanza Group#Border Ranges Fault#Bowser |
|---|
| ergs | |
|---|---|
| BT | eolian features |
| .ergs | |
| RT | Sahara |
| sand | |
| dunes | |
| deserts | |
| sand ridges | |
| sedimentary structures | |
| sand seas | |
| sand sheets | |
| SN | Added to Thesaurus in 1993. |
| Ericaceae | |
|---|---|
| BT | Plantae |
| .Spermatophyta | |
| ..Angiospermae | |
| ...Dicotyledoneae | |
| ....Ericaceae | |
| SN | Family. |
| Eridostraca | |
|---|---|
| BT | Invertebrata |
| .Arthropoda | |
| ..Mandibulata | |
| ...Crustacea | |
| ....Ostracoda | |
| .....Eridostraca | |
| RT | microfossils |
| SN | Includes Superfamily Leperditellacea. Indexed with microfossils if applicable. |
| Erie County New York | |
|---|---|
| BT | United States |
| .New York | |
| ..Erie County New York | |
| SN | W New York. |
| Erie County Ohio | |
|---|---|
| BT | United States |
| .Ohio | |
| ..Erie County Ohio | |
| SN | N Ohio. |
| Erie County Pennsylvania | |
|---|---|
| BT | United States |
| .Pennsylvania | |
| ..Erie County Pennsylvania | |
| NT | Presque Isle |
| SN | NW Pennsylvania. |
| Erimo Seamount | |
|---|---|
| BT | Pacific Ocean |
| .North Pacific | |
| ..Northwest Pacific | |
| ...Erimo Seamount | |
| RT | Japan Trench |
| Kuril Trench | |
| SN | Off S coast of Hokkaido, Japan. This term has multiple hierarchies. |
| erionite | |
|---|---|
| BT | silicates |
| .framework silicates | |
| ..zeolite group | |
| ...erionite | |
| Eritrea | |
|---|---|
| BT | Africa |
| .East Africa | |
| ..Eritrea | |
| RT | Ethiopia |
| Afar | |
| Afar Depression | |
| East African Rift | |
| Red Sea Basin | |
| Ethiopian Rift | |
| Nubian Shield | |
| SN | E Africa on the Red Sea. Used in subfile G. Ethiopia was used for this term between 1972 and 1994. Added to Thesaurus in 1995. |
| Erivan Armenia | |
|---|---|
| USE | Yerevan Armenia |
| Erlangen Germany | |
|---|---|
| BT | Europe |
| .Central Europe | |
| ..Germany | |
| ...Bavaria Germany | |
| ....Erlangen Germany | |
| SN | City in N central Bavaria. |
| erodability | |
|---|---|
| USE | erodibility |
| erodibility | |
|---|---|
| UF | erodability |
| erosibility | |
| RT | erosion |
| Universal Soil Loss Equation | |
| SN | A measurement of the tendency for or degree of a material to erode. |
| Eromanga Basin | |
|---|---|
| BT | Australasia |
| .Australia | |
| ..Queensland Australia | |
| ...Eromanga Basin | |
| RT | Birkhead Formation |
| SN | In SW Queensland. |
| Eros Asteroid | |
|---|---|
| BT | asteroids |
| .S-type asteroids | |
| ..Eros Asteroid | |
| UF | 433 Eros |
| RT | NEAR Program |
| SN | Object of NEAR Program study. |
| erosi |
|---|
| erosibility | |
|---|---|
| USE | erodibility |
| erosion control | |
|---|---|
| UF | control, erosion |
| RT | wind erosion |
| erosion | |
| soils | |
| GLEAMS | |
| conservation | |
| beach nourishment | |
| beach profiles | |
| riprap | |
| controls | |
| soil erosion | |
| water erosion | |
| geomembranes | |
| geotextiles | |
| erosion cycle | |
|---|---|
| RT | cycles |
| erosion | |
| geomorphology | |
| landform evolution | |
| peneplains | |
| SN | Added to Thesaurus in 1982. |
| erosion forms | |
|---|---|
| USE | erosion features |
| erosion rates | |
|---|---|
| RT | bioerosion |
| erosion | |
| land loss | |
| rates | |
| resurfacing | |
| sedimentation | |
| soil erosion | |
| soils | |
| sediment transport | |
| SN | Before 1993, also search erosion AND rates. Added to Thesaurus in 1993. |
| erosion surfaces | |
|---|---|
| BT | erosion features |
| .erosion surfaces | |
| NT | pediplains |
| UF | planation surfaces |
| surfaces, erosion | |
| RT | erosion |
| planation | |
| geomorphology | |
| wave-cut platforms | |
| resurfacing | |
| peneplains | |
| pediments | |
| erosion transport | |
|---|---|
| SN | As of 1993, not a valid term for GeoRef. See sediment transport. |
| erosional features | |
|---|---|
| USE | erosion features |
| erosional unconformities | |
|---|---|
| BT | unconformities |
| .erosional unconformities | |
| UF | disconformities |
| RT | erosion |
| exhumation | |
| SN | Added to Thesaurus in 1982. |
| erratic blocks | |
|---|---|
| USE | erratics |
| erratic boulders | |
|---|---|
| USE | erratics |
| erratics | |
|---|---|
| BT | sediments |
| .clastic sediments | |
| ..erratics | |
| UF | erratic blocks |
| erratic boulders | |
| RT | glacial geology |
| glaciers | |
| glacial features | |
| boulders | |
| glacial transport | |
| errors | |
|---|---|
| RT | accuracy |
| corrections | |
| maximum likelihood | |
| precision | |
| reliability | |
| uncertainty | |
| SN | Used as a general term. |
| ERS-1 | |
|---|---|
| UF | ERS1 |
| European Remote Sensing satellite 1 | |
| RT | remote sensing |
| infrared methods | |
| satellite methods | |
| radar methods | |
| microwave methods | |
| SN | European Space Agency remote sensing satellite launched 1991. Includes microwave, radar altimetry, and infrared radiometry instrumentation. Also index specific geophysical methods as applicable. Added to Thesaurus in 1998. |
| ERS1 | |
|---|---|
| USE | ERS-1 |
| Ertix River | |
|---|---|
| USE | Irtysh River |
| ERTS | |
|---|---|
| SN | A valid term through 1977. After 1977, use Landsat. |
| ERTS-1 | |
|---|---|
| SN | A valid term through 1977. After 1977, use Landsat. |
| erubescite | |
|---|---|
| USE | bornite |
| eruption clouds | |
|---|---|
| USE | ash clouds |
| eruptive rocks | |
|---|---|
| USE | volcanic rocks |
| Ervine Creek Limestone | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Paleozoic | |
| ...Carboniferous | |
| ....Pennsylvanian | |
| .....Upper Pennsylvanian | |
| ......Virgilian | |
| .......Ervine Creek Limestone | |
| RT | Iowa |
| Missouri | |
| Nebraska | |
| Kansas | |
| SN | Of Deer Creek Limestone. SW Iowa, NE Kansas, NW Missouri and SE Nebraska. |
| Erzgebirge | |
|---|---|
| BT | Europe |
| .Central Europe | |
| ..Erzgebirge | |
| NT | Czech Erzgebirge |
| UF | Krusne Hory |
| Krusnehory Mountains | |
| Krusny Hory Mountains | |
| RT | Saxony Germany |
| Czech Republic | |
| Bohemia | |
| SN | Mountain range on the border of Saxony, Germany and Bohemia. Indexed with countries as applicable. |
| Erzincan earthquake 1992 | |
|---|---|
| BT | earthquakes |
| .Erzincan earthquake 1992 | |
| RT | Turkey |
| SN | Epicenter in Erzincan Province, E central Turkey. Added to Thesaurus in 1998. |