| State | California |
|---|---|
| Name | Quaternary volcanic flow rocks, unit 1 (Cascade Volcanic Field) |
| Geologic age | Quaternary |
| Lithologic constituents |
Major
Igneous > Volcanic > Mafic-volcanic > Basalt (Flow, Volcaniclastic-lahar, Volcaniclastic-volcanic breccia)
Igneous > Volcanic > Mafic-volcanic > Andesite (Flow, Volcaniclastic-lahar, Volcaniclastic-volcanic breccia, Pyroclastic)
Incidental
Igneous > Volcanic > Felsic-volcanic > Rhyolite (Pyroclastic, Flow)
Igneous > Volcanic > Mafic-volcanic > Basaltic-andesite (Flow, Volcaniclastic-lahar, Volcaniclastic-volcanic breccia)
Igneous > Volcanic > Felsic-volcanic > Dacite (Pyroclastic, Flow)
|
| Stratigraphic units | Warner Basalt (part), Butte Valley Basalt, Lake Basalt, Lousetown Fm. |
| 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 | El Dorado - Lassen - Modoc - Nevada - Placer - Plumas - Shasta - Sierra - Siskiyou - Tehama |