| State | California |
|---|---|
| Name | Tertiary pyroclastic and volcanic mudflow deposits, unit 9 (Cascade Range) |
| Geologic age | Tertiary (2-24 Ma) |
| Lithologic constituents |
Major
Igneous > Volcanic > Mafic-volcanic > Andesite (Volcaniclastic-lahar, Pyroclastic)
Minor
Igneous > Volcanic > Felsic-volcanic > Rhyolite (Volcaniclastic-lahar, Pyroclastic)
Incidental
Igneous > Volcanic > Mafic-volcanic > Basaltic-andesite (Volcaniclastic-lahar, Pyroclastic)
Igneous > Volcanic > Mafic-volcanic > Basalt (Volcaniclastic-lahar, Pyroclastic)
|
| Stratigraphic units | Alturas Fm., Bonta Fm., Cedarville Series (part), Delleker Fm., Ingalls Fm., Mehrten Fm. (part), Nomlaki Tuff Mbr., Penman Fm., Reeds Creek Andesite, Spanish Canyon Fm., Tropico Group (part), Tuscan Fm., Valley Springs Fm. (part) |
| 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 Luedke, R.G., Smith, R.L., and Russell-Robinson, S.L., 1983, Map showing distribution, composition, and age of late Cenozoic volcanoes and volcanic rocks of the Cascade Range and vicinity, northwestern United States: U.S. Geological Survey Miscellaneous Investigations Series Map I-1507, scale 1:500,000.https://pubs.er.usgs.gov/publication/i1507 Grose, T.L.T., 2000, Volcanoes in the Susanville region, Lassen, Modoc, Plumas Counties, northeastern California: California Geology, v. 53, p. 4-23.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 | Alpine - Amador - Butte - Calaveras - El Dorado - Glenn - Lassen - Mariposa - Modoc - Mono - Nevada - Placer - Plumas - Shasta - Sierra - Siskiyou - Tehama - Tuolumne - Yolo - Yuba |