Sedimentary rocks associated with flood basalts. (IDTms;0)

Sedimentary rocks associated with flood basalts.

Fluvial and lacustrine deposits associated with Columbia River Basalt Group and equivalent basalts (17-8 Ma); consolidated to weakly consolidated sandstone, siltstone, arkose, conglomerate, claystone, and tuffaceous sediment; subordinate intercalated basalt and rhyolitic tuff. Includes Payette and Sucker Creek formations in southwestern Idaho, sediments associated with basalt of Weiser in western Idaho, and Latah Formation in northern Idaho. Includes sedimentary rocks of uncertain origin in southwest corner of Idaho. (Quaternary to Eocene Continental Sediments and Sedimentary Rocks).

State	Idaho
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	NGMDB product page for 97750
Counties	Ada - Adams - Benewah - Boise - Camas - Canyon - Cassia - Clearwater - Elmore - Gem - Idaho - Kootenai - Latah - Owyhee - Payette - Shoshone - Valley - Washington

Sedimentary rocks associated with flood basalts.

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.