State | Idaho |
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Name | Sedimentary rocks associated with flood basalts. |
Geologic age | Miocene |
Lithologic constituents |
Major
Sedimentary > Clastic > Mixed-clastic (Bed, Tuffaceous)Consolidated to weakly consolidated sandstone, siltstone, arkose, conglomerate, claystone, and tuffaceous sediment.
Minor
Igneous > Volcanic > Felsic-volcanic > Rhyolite (Pyroclastic-tuff)Subordinate intercalated basalt and rhyolitic tuff.
Igneous > Volcanic > Mafic-volcanic > BasaltSubordinate intercalated basalt.
|
References | Lewis, Reed S., Link, Paul K., Stanford, Loudon R., and Long, Sean P., Geologic Map of Idaho, 2012, Idaho Geological Survey, Geologic Map 9 (M-9); Scale 1:500,000. |
NGMDB product | |
Counties | Ada - Adams - Benewah - Boise - Camas - Canyon - Cassia - Clearwater - Elmore - Gem - Idaho - Kootenai - Latah - Owyhee - Payette - Shoshone - Valley - Washington |