Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
Ir  | |
|---|---|
| USE | iridium |
| IR spectra | |
|---|---|
| USE | infrared spectra |
| Irazu | |
|---|---|
| BT | Central America |
| .Costa Rica | |
| ..Irazu | |
| UF | Irazu Volcano |
| RT | volcanoes |
| SN | Volcano. central Costa Rica. Added to Thesaurus in 1989. |
| Irazu Volcano | |
|---|---|
| USE | Irazu |
| Iredell County North Carolina | |
|---|---|
| BT | United States |
| .North Carolina | |
| ..Iredell County North Carolina | |
| Ireland | |
|---|---|
| BT | Europe |
| .Western Europe | |
| ..Ireland | |
| NT | Clare Ireland |
| Cork Ireland | |
| Donegal Ireland | |
| Dublin Ireland | |
| Galway Ireland | |
| Kerry Ireland | |
| Kildare Ireland | |
| Leinster | |
| Limerick Ireland | |
| Mayo Ireland | |
| Meath Ireland | |
| Sligo Ireland | |
| Tipperary Ireland | |
| Wexford Ireland | |
| Wicklow Ireland | |
| Wicklow Mountains | |
| UF | Eire |
| RT | Northern Ireland |
| Dunnage Zone | |
| Ballachulish Complex | |
| Atlantic Ocean Islands | |
| Avalonia | |
| Dalradian | |
| Caledonian Orogeny | |
| Caledonides | |
| Highland Boundary Fault | |
| Leinster Granite | |
| Midland Valley | |
| SN | The Republic of Ireland, also called Eire, which occupies the 26 counties in the S, central, and NW of the island of Ireland. |
| irghizite | |
|---|---|
| BT | tektites |
| .irghizite | |
| RT | Kazakhstan |
| Aktyubinsk Kazakhstan | |
| Zhamanshin Crater | |
| SN | Tektite group associated with Zhamanshin Crater in Kazakhstan. Before 1993, also search irgizite. Added to Thesaurus in 1993. |
| Irgiz Kazakhstan | |
|---|---|
| BT | Commonwealth of Independent States |
| .Kazakhstan | |
| ..Aktyubinsk Kazakhstan | |
| ...Irgiz Kazakhstan | |
| SN | Village on Irgiz River in Aktyubinsk Oblast in E Kazakhstan. This term has multiple hierarchies. |
| Irian Barat | |
|---|---|
| USE | Irian Jaya Indonesia |
| Irian Jaya Indonesia | |
|---|---|
| BT | Asia |
| .Far East | |
| ..Indonesia | |
| ...Irian Jaya Indonesia | |
| BT | Malay Archipelago |
| .New Guinea | |
| ..Irian Jaya Indonesia | |
| UF | Dutch New Guinea |
| Irian Barat | |
| Netherlands New Guinea | |
| West Irian | |
| West New Guinea | |
| RT | False Cape |
| Papuan Basin | |
| Papuan fold belt | |
| SN | W half of island of New Guinea. This term has multiple hierarchies. |
| iridium | |
|---|---|
| BT | metals |
| .platinum group | |
| ..iridium | |
| UF | Ir |
| RT | iridium ores |
| SN | Chemical element. As of 1985, use iridium ores for iridium as a commodity. |
| iridium ores | |
|---|---|
| BT | metal ores |
| .iridium ores | |
| RT | iridium |
| platinum ores | |
| SN | Before 1985, also search iridium AND (deposit OR deposits OR ore OR ores OR economic) in the basic index. Commodity. See List C. |
| Irion County Texas | |
|---|---|
| BT | United States |
| .Texas | |
| ..Irion County Texas | |
| IRIS network | |
|---|---|
| UF | Incorporated Research Institutions for Seismology network |
| RT | seismology |
| data processing | |
| PASSCAL | |
| seismic networks | |
| programs | |
| SN | Acronym. Before 1993, also search IRIS AND seismology or geophysical methods. Consortium founded in 1984, collects and disseminates seismic data from around the world. Three major programs are supported by the consortium, IRIS: GSN (Global Seismic Network |
| Irish Sea | |
|---|---|
| BT | Atlantic Ocean |
| .North Atlantic | |
| ..Irish Sea | |
| RT | Cardigan Bay |
| Morecambe Bay | |
| SN | Between England and Ireland. |
| Irkutsk Amphitheater | |
|---|---|
| USE | Irkutsk Basin |
| Irkutsk Basin | |
|---|---|
| BT | Commonwealth of Independent States |
| .Russian Federation | |
| ..Irkutsk Basin | |
| BT | Asia |
| .Irkutsk Basin | |
| UF | Cheremkhovo Basin |
| Cheremkovo coal basin | |
| Irkutsk Amphitheater | |
| RT | coal fields |
| SN | Coal Basin extending 150 miles NW along Trans-Siberian RR from Lake Baikal. This term has multiple hierarchies. |
| Irkutsk Russian Federation | |
|---|---|
| BT | Commonwealth of Independent States |
| .Russian Federation | |
| ..Irkutsk Russian Federation | |
| BT | Asia |
| .Irkutsk Russian Federation | |
| NT | Biryusa River |
| Bodaibo Russian Federation | |
| Chuya Russian Federation | |
| Mama Russian Federation | |
| Slyudyanka Russian Federation | |
| Ulkan Russian Federation | |
| Ust-Kut Russian Federation | |
| RT | Angara-Lena Basin |
| Lena Basin | |
| Baikal Mountains | |
| Baikal region | |
| Lake Baikal | |
| Baikal rift zone | |
| Vitim River | |
| Oka River | |
| Iya River | |
| Patom Plateau | |
| Uda River | |
| SN | Oblast W and N of Lake Baikal. Before 1993, Irkutsk Russian Republic was also used. This term has multiple hierarchies. |
| iron | |
|---|---|
| BT | metals |
| .iron | |
| NT | Fe-55 |
| Fe-57 | |
| Fe-59 | |
| ferric iron | |
| ferrous iron | |
| UF | Fe |
| RT | iron meteorites |
| iron ores | |
| native elements | |
| chalcophile elements | |
| awaruite | |
| ferruginous composition | |
| iron-rich composition | |
| heavy metals | |
| gossan | |
| ferromanganese composition | |
| ferrosilicon | |
| iron minerals | |
| hematite | |
| iron silicates | |
| josephinite | |
| kamacite | |
| siderophile elemen | |
| SN | Chemical element. Use iron ores for iron as a commodity. |
| Iron Age | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Cenozoic | |
| ...Iron Age | |
| RT | Holocene |
| archaeology | |
| Quaternary | |
| SN | Archaeological classification. Added to Thesaurus in 1985. |
| iron alum | |
|---|---|
| USE | halotrichite |
| Iron County Michigan | |
|---|---|
| BT | United States |
| .Michigan | |
| ..Michigan Upper Peninsula | |
| ...Iron County Michigan | |
| RT | Perch Lake |
| SN | SW Michigan Upper Peninsula. NW Michigan. |
| Iron County Missouri | |
|---|---|
| BT | United States |
| .Missouri | |
| ..Iron County Missouri | |
| SN | SE central Missouri. |
| Iron County Utah | |
|---|---|
| BT | United States |
| .Utah | |
| ..Iron County Utah | |
| RT | Black Mountains |
| Wah Wah Mountains | |
| Broken Ridge | |
| SN | SW Utah. |
| Iron County Wisconsin | |
|---|---|
| BT | United States |
| .Wisconsin | |
| ..Iron County Wisconsin | |
| SN | N Wisconsin. |
| iron hydroxide | |
|---|---|
| USE | iron hydroxides |
| iron hydroxides | |
|---|---|
| BT | oxides |
| .hydroxides | |
| ..iron hydroxides | |
| UF | iron hydroxide |
| RT | akaganeite |
| citrate-bicarbonate-dithionite method | |
| ferrihydrite | |
| goethite | |
| lepidocrocite | |
| SN | As of 1998, used for the group only where specific minerals are numerous or unavailable. |
| iron minerals | |
|---|---|
| RT | franklinite |
| goethite | |
| hematite | |
| ilmenite | |
| iron | |
| iron ores | |
| iron oxides | |
| iron silicates | |
| iron sulfides | |
| jacobsite | |
| limonite | |
| magnetite | |
| marcasite | |
| minerals | |
| pyrite | |
| pyrrhotite | |
| siderite | |
| Iron Ore Group | |
|---|---|
| BT | Chronostratigraphic Units |
| .Precambrian | |
| ..Archean | |
| ...Iron Ore Group | |
| RT | India |
| SN | E India. Added to Thesaurus in 1989. |
| Iron Quadrangle, Brazil | |
|---|---|
| USE | Quadrilatero Ferrifero |
| iron silicates | |
|---|---|
| BT | silicates |
| .iron silicates | |
| RT | iron |
| iron minerals | |
| SN | As of 1998, used for the group only where specific minerals are numerous or unavailable. |
| iron spinel | |
|---|---|
| USE | hercynite |
| iron sulfides | |
|---|---|
| BT | sulfides |
| .iron sulfides | |
| RT | gossan |
| iron minerals | |
| tochilinite | |
| iron-formations | |
|---|---|
| USE | iron formations |
| iron-rich composition | |
|---|---|
| RT | banded iron formations |
| chemically precipitated rocks | |
| composition | |
| ferruginous composition | |
| geochemistry | |
| iron | |
| iron formations | |
| lithogeochemistry | |
| sedimentary rocks | |
| sediments | |
| SN | For sedimentary rocks, use ferruginous composition. Before 1978, search iron-rich rocks; iron-rich sediments. |
| iron-rich rocks | |
|---|---|
| SN | A valid term through mid-1978. Use iron-rich composition or iron formations. |
| iron-rich sediments | |
|---|---|
| SN | A valid term through mid-1978. Use ferruginous composition under sediments. |
| iron-stony meteorite | |
|---|---|
| USE | stony irons |
| ironstone | |
|---|---|
| BT | sedimentary rocks |
| .chemically precipitated rocks | |
| ..ironstone | |
| Iroquois County Illinois | |
|---|---|
| BT | United States |
| .Illinois | |
| ..Iroquois County Illinois | |
| SN | E Illinois. |
| Irpinia earthquake 1980 | |
|---|---|
| BT | earthquakes |
| .Irpinia earthquake 1980 | |
| UF | Campania-Basilicata earthquake 1980 |
| Campania-Lucania earthquake 1980 | |
| southern Italy earthquake 1980 | |
| RT | Italy |
| Basilicata Italy | |
| Lucania | |
| Campania Italy | |
| SN | Before 1985, also search (Irpinia OR Lucania OR Campania OR southern Italy) AND earthquakes AND 1980. Before 1993, also search Irpinia-Basilicata earthquake 1980. Added to Thesaurus in 1993. |
| irradiation | |
|---|---|
| RT | techniques |
| thermoluminescence | |
| X-ray analysis | |
| SN | Added to Thesaurus in 1981. |
| irrigation | |
|---|---|
| RT | ponds |
| reinjection wells | |
| salinization | |
| soil treatment | |
| soils | |
| surface water | |
| underground channels | |
| water | |
| water quality | |
| water regimes | |
| water supply | |
| waterways | |
| irrotational wave | |
|---|---|
| USE | P-waves |
| irruption (intrusion) | |
|---|---|
| USE | intrusions |
| Irtish River | |
|---|---|
| USE | Irtysh River |
| Irtysh River | |
|---|---|
| BT | Asia |
| .Irtysh River | |
| UF | Ertix River |
| Irtish River | |
| RT | Russian Federation |
| Kazakhstan | |
| Xinjiang China | |
| Ishim River | |
| Ob River | |
| Ob-Irtysh Interfluve | |
| SN | Largest tributary of the Ob River. Also search Irtysh. Indexed with Xinjiang China and former Soviet republics as applicable. |
| Irvingtonian | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Cenozoic | |
| ...Quarternary | |
| ....Pleistocene | |
| .....Irvingtonian | |
| SN | North American continental stage. Above Blancan and below Rancholabrean. Added to Thesaurus in 1989. |
| Irwin County Georgia | |
|---|---|
| BT | United States |
| .Georgia | |
| ..Irwin County Georgia | |