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Geologic units in Gooding county, Idaho

[Additional scientific data in this geographic area]

Basalt and silt; Late Pleistocene basalt flows and interlayered lacustrine silt beds of subunit 1b; Snake River Plain (Late Pleistocene) at surface, covers 8 % of this area
Upper Pleistocene Snake Plain basaltic lava flows, unit 1.
Lithology: tholeiite; lava flow; silt
Rhyolite, quartz latite, and latite ignimbrites and flows; Miocene felsic volcanics; Owyhee Plateau; (Miocene) at surface, covers 11 % of this area
Miocene silicic flows, tuffs; most common in southwestern Idaho.
Lithology: rhyolite; latite; quartz latite; ignimbrite; lava flow
Open Water (Holocene) at surface, covers 0.6 % of this area
Lakes and streams
Lithology: water
Basalt flows, pumice, and tuff; Early Pleistocene to Pliocene basaltic volcanics; Snake River Plain (Early Pleistocene) at surface, covers 1 % of this area
Lower Pleistocene to Pliocene basalts with associated tuffs and volcanic detritus.
Lithology: tholeiite; lava flow; pumice; tuff
Basalt flows, pyroclastic debris, clastic sediments, and diatomite; Pliocene basaltic volcanics and clastic sediments; Snake River Plain and vicinity (Pliocene) at surface, covers 23 % of this area
Pliocene olivine basalt flows and associated tuff and detritus of southern Idaho.
Lithology: basalt; lava flow; tuff; mixed clastic/volcanic
Basalt, pumice; Holocene basaltic lava flows and cinder cones; Snake River Plain and vicinity (Holocene) at surface, covers 10 % of this area
Recent, relatively unweathered Snake Plain basalt flows and cinder cones.
Lithology: tholeiite; lava flow; pumice
Basalt, clay, and gravel; Late Pleistocene basalt flows with interlayered alluvial and lacustrine sediments; Snake River Plain and vicinity (subunits are Qpu1b, Qpu2b, Qpu3b, and Qpu4b) (Late Pleistocene) at surface, covers 9 % of this area
Upper Pleistocene Snake Plain lava flows; local stratigraphic position shown by (Qpu4b, Qpu3b, Qpu2b, Qpu1b).
Lithology: tholeiite; lava flow; clay or mud; gravel
Basalt and gravel; Late Pleistocene basalt flows and interlayered gravel of subunit 2b; Snake River Plain (Late Pleistocene) at surface, covers 6 % of this area
Upper Pleistocene Snake Plain basaltic lava flows, unit 2.
Lithology: tholeiite; lava flow; gravel
Basalt, clay, and pumice; Late Pleistocene basalt flows, volcaniclastic debris, and ponded sediments of subunit 4b; Snake River Plain; (Late Pleistocene) at surface, covers 13 % of this area
Upper Pleistocene Snake Plain basaltic lava flows, unit 4.
Lithology: tholeiite; lava flow; clay or mud; pumice
Sandstone, conglomerate, siltstone, tuff, claystone, limestone, and diatomite; Pliocene tuffaceous alluvial and lacustrine deposits; Snake River Plain and vicinity, southeastern Idaho (Pliocene ) at surface, covers 2 % of this area
Pliocene stream and lake deposits; may be due to volcanic and block-faulting events.
Lithology: sandstone; conglomerate; siltstone; tuff; claystone; shale; limestone
Basalt flows, basaltic pyroclastic and clastic debris; Middle Pleistocene canyon-filling and plateau lava flows, pyroclastic debris, alluvium, and colluvium; Snake River Plain (Middle Pleistocene) at surface, covers 7 % of this area
Middle Pleistocene plateau and canyon-filling basalt in and near Snake Plain.
Lithology: tholeiite; lava flow; pyroclastic; alluvium; colluvium
Silt, clay, and diatomite; Middle Pleistocene lacustrine sediments of lava-dammed lakes; western Snake River Plain (Middle Pleistocene) at surface, covers 0.6 % of this area
Middle Pleistocene lava-dammed Snake Plain lake beds of silt, clay and diatomite.
Lithology: lake or marine deposit (non-glacial); alluvium; silt; clay or mud; diatomite; sand; gravel
Trachyandesite, latite, trachybasalt flows, dikes, and volcaniclastic debris; Eocene intermediate volcanics; central Idaho, southern Challis volcanic field (Eocene) at surface, covers < 0.1 % of this area
Eocene mixed silicic and basaltic volcanic ejecta, flows and reworked debris.
Lithology: trachyandesite; latite; trachybasalt; dacite; trachyte; lava flow; volcanic breccia (agglomerate)
Gravel, sand, and silt; Quaternary; alluvium (Quaternary) at surface, covers 4 % of this area
Quaternary alluvium; may contain some glacial deposits and colluvium in uplands
Lithology: alluvium; alluvial terrace; floodplain; alluvial fan; colluvium
Gravel, sand, and silt; glacial outburst flood deposits, outwash, fanglomerate, and alluvium, undivided; Pleistocene (Pleistocene) at surface, covers 0.6 % of this area
Pleistocene outwash, fanglomerate, flood and terrace gravels; sudivisions are: (Qpug, Qpmg, and Qplg).
Lithology: stratified glacial sediment; alluvium; outwash; alluvial fan; alluvial terrace
Gravel, sand, silt, clay; Late Pleistocene glacio-alluvial and lacustrine deposits; Basin and Range, and Snake River Plain (Late Pleistocene) at surface, covers 2 % of this area
Upper Pleistocene deposits; outwash, fanglomerate, flood and terrace gravels.
Lithology: outwash; alluvium; lake or marine deposit (non-glacial); gravel; sand; silt; clay or mud
Silt, clay, sand, and gravel; Quaternary-Tertiary alluvial and lacustrine deposits; western Snake River Plain (Early Pleistocene and Late Pliocene) at surface, covers 3 % of this area
Pleistocene and Pliocene stream and lake deposits.
Lithology: lake or marine deposit (non-glacial); alluvium; silt; clay; sand; gravel
Clastic debris; Quaternary colluvium, fanglomerate, talus, and glacial deposits; upland-valley margins (Quaternary) at surface, covers 0.2 % of this area
Quaternary colluvium, fanglomerate, and talus plus some glacial debris in upland valleys.
Lithology: alluvium; glacial drift; colluvium

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