Older rhyolite, latite, and andesite.

Older rhyolite, latite, and andesite (Miocene)—Rhyolitic domes and tuffs, and subordinate latite flows (17-14 Ma); includes rhyolites of Silver City and tuff of Flint Creek in the Owyhee Mountains and rhyolite of Timber Butte northeast of Emmett. (Quaternary to Eocene Continental Volcanic and Intrusive Rocks).
State Idaho
Name Older rhyolite, latite, and andesite.
Geologic age Miocene
Lithologic constituents
Igneous > Volcanic > Felsic-volcanic > Rhyolite (Dome, Pyroclastic-tuff)
Igneous > Volcanic > Felsic-volcanic > Latite (Flow)
Igneous > Volcanic > Mafic-volcanic > Andesite

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 Boise - Cassia - Gem - Owyhee