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Gravel; Early Pleistocene alluvium; western Snake River Plain

Lower Pleistocene deposits; outwash, fanglomerate, flood and terrace gravels.
StateIdaho
NameGravel; Early Pleistocene alluvium; western Snake River Plain
Geologic agePleistocene
Original map labelQplg
CommentsLower Pleistocene Tuana Gravel is alluvial and pediment gravel in the western Snake River Plain. It consists of at least 5 beds of well-bedded pebble gravel, interlayered with sand, silt, and clay. Individual beds are well sorted (ID021).
Primary rock typealluvium
Secondary rock typegravel
Other rock typessand; silt; clay or mud
Lithologic constituents
Major
Unconsolidated > Coarse-detrital > Gravel (Alluvial)at least 5 beds of well-sorted pebble gravel
Unconsolidated > Coarse-detrital > Sand (Alluvial)sand interbeds
Minor
Unconsolidated > Fine-detrital > Clay (Alluvial)clay interbeds
Unconsolidated > Fine-detrital > Silt (Alluvial)silt interbeds
Map references
Bond, J.G., Kauffman, J.D., Miller, D.A., and Venkatakrishnan, Ramesh, 1978, Geologic map of Idaho: Moscow, Idaho, Idaho Bureau of Mines and Geology, with contributions from U.S. Geological Survey, scale 1:500,000.
Unit references
Bond, J.G., Kauffman, J.D., Miller, D.A., and Venkatakrishnan, Ramesh, 1978, Geologic map of Idaho: Moscow, Idaho, Idaho Bureau of Mines and Geology, with contributions from U.S. Geological Survey, scale 1:500,000.
Malde, H.E. and Powers, H.A., 1962, Upper Cenozoic stratigraphy of western Snake River Plain, Idaho: Geological Society of America Bulletin, v. 73, no. 10, p. 1197-1220.
Rember, W.C., and Bennett, E.H., 1979, Geologic map of the Twin Falls quadrangle, Idaho: Moscow, Idaho, Idaho Bureau of Mines and Geology, Geologic Map Series, Twin Falls 2o quadrangle, scale 1:250,000.
Geographic coverageOwyhee - Twin Falls

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