| State | California |
|---|---|
| Name | Quaternary pyroclastic and volcanic mudflow deposits, unit 1, questionably identified (Cascade Volcanic Field) |
| Geologic age | Quaternary |
| Lithologic constituents |
Major
Igneous > Volcanic > Mafic-volcanic > Andesite (Volcaniclastic-lahar, Pyroclastic)
Minor
Igneous > Volcanic > Felsic-volcanic > Rhyolite (Pyroclastic-ash flow)
Incidental
Igneous > Volcanic > Mafic-volcanic > Basalt (Volcaniclastic-lahar, Pyroclastic)
Igneous > Volcanic > Mafic-volcanic > Basaltic-andesite (Volcaniclastic-lahar, Pyroclastic)
|
| References | 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.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 |
| NGMDB product | |
| Counties | Modoc |