Quaternary volcanic flow rocks, unit 3 (Clear Lake Volcanic Field)

Quaternary volcanic flow rocks; minor pyroclastic deposits; in part Pliocene and Miocene.
State California
Name Quaternary volcanic flow rocks, unit 3 (Clear Lake Volcanic Field)
Geologic age Quaternary (0-4 Ma)
Lithologic constituents
Major
Igneous > Volcanic > Mafic-volcanic > Andesite (Flow, Volcaniclastic-volcanic breccia)
Minor
Igneous > Volcanic > Felsic-volcanic > Dacite (Flow, Volcaniclastic-volcanic breccia, Dome)
References
NGMDB product
Counties Lake - Napa - Sonoma