| State | California |
|---|---|
| Name | Tertiary volcanic flow rocks, unit 17 (Cascade Range) |
| Geologic age | Tertiary (2-24 Ma) |
| Lithologic constituents |
Major
Igneous > Volcanic > Mafic-volcanic > Andesite (Flow, Volcaniclastic-volcanic breccia, Volcaniclastic-lahar)
Igneous > Volcanic > Mafic-volcanic > Basalt (Flow, Volcaniclastic-volcanic breccia, Volcaniclastic-lahar)
Incidental
Igneous > Volcanic > Felsic-volcanic > Dacite (Volcaniclastic-volcanic breccia, Flow, Dome)
Igneous > Volcanic > Felsic-volcanic > Rhyolite (Pyroclastic, Flow, Dome)
Igneous > Volcanic > Mafic-volcanic > Basaltic-andesite (Flow, Volcaniclastic-volcanic breccia, Volcaniclastic-lahar)
|
| Stratigraphic units | Colestin Fm., Raymond Peak Andesites, Roxy Fm., Shasta Lavas, Silver Peak Andesites, Table Mountain Latite, Tryon Peak Flows, Warner Basalt (part), Wasson 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 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 - Butte - Calaveras - Lassen - Modoc - Mono - Nevada - Placer - Plumas - Shasta - Sierra - Siskiyou - Stanislaus - Tehama - Tuolumne |