| State | California |
|---|---|
| Name | Tertiary intrusive rocks (hypabyssal), unit 1 (Cascades Volcanic Field) |
| Geologic age | Tertiary |
| Lithologic constituents |
Major
Igneous > Hypabyssal > Mafic-hypabyssal > Hypabyssal-andesite (Pluton)
Minor
Igneous > Hypabyssal > Mafic-hypabyssal > Hypabyssal-basalt (Pluton)
Igneous > Hypabyssal > Felsic-hypabyssal > Hypabyssal-rhyolite (Pluton)
Incidental
Igneous > Hypabyssal > Mafic-hypabyssal > Hypabyssal-basaltic-andesite (Pluton)
Igneous > Hypabyssal > Felsic-hypabyssal > Hypabyssal-dacite (Pluton)
|
| 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 - Lassen - Modoc - Mono - Plumas - Sierra - Siskiyou - Tehama - Tuolumne |