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

Recent (Holocene) volcanic flow rocks; minor pyroclastic deposits; in part Pleistocene.
State California
Name Recent (Holocene) volcanic flow rocks, unit 3 (Clear Lake Volcanic Field)
Geologic age Holocene
Lithologic constituents
Major
Igneous > Volcanic > Mafic-volcanic > Andesite (Flow, Volcaniclastic-volcanic breccia)
Comments source of heat for geothermal energy
References

Luedke, R.G., and Smith, R.L., 1981, Map showing distribution, composition, and age of late Cenozoic volcanic centers in California and Nevada: U.S. Geological Survey Miscellaneous Investigations Series Map I-1091-C, scale 1:1,000,000.

https://pubs.er.usgs.gov/publication/i1091C

Jennings, C.W., Strand, R.G., Rogers, T.H., Boylan, R.T., Moar, R.R., and Switzer, R.A., 1977, Geologic Map of California: California Division of Mines and Geology, Geologic Data Map 2, scale 1:750,000.

NGMDB product
Counties Lake