| State | California |
|---|---|
| Name | Paleozoic metavolcanic rocks, unit 1 (Eastern Klamath Mountains) |
| Geologic age | Devonian and Permian |
| Lithologic constituents |
Major
Igneous > Volcanic > Mafic-volcanic (Flow-pillows, Volcaniclastic-volcanic breccia, Pyroclastic-tuff)Includes pillow lavas, volcanic breccia, and tuffs
Minor
Igneous > Volcanic > Felsic-volcanic (Flow, Volcaniclastic-volcanic breccia, Pyroclastic-tuff)Includes flows, breccias, and tuffs
Sedimentary > Clastic > Mudstone (Bed, Tuffaceous)Mostly tuffaceous
Incidental
Sedimentary > Clastic > Conglomerate (Bed)
Sedimentary > Clastic > Sandstone (Bed, Tuffaceous)Mostly tuffaceous
|
| Comments | Eastern Klamath Mountains. Mostly andesitic to basaltic lavas, breccias, and tuffs; less abundant silicic volcanics; and minor sedimentary rocks. Devonian and Permian in age |
| Stratigraphic units | Balaklala Rhyolite, Bass Mountain Diabase (part), Copley Greenstone, Dekkas Andesite, Nosoni Fm. |
| 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.Jennings, C.W., 1985, An explanatory text to accompany the 1:750,000 scale fault and geologic maps of California: California Division of Mines and Geology, Bulletin 201, 197 p.Strand, R.G., 1962, Geologic map of California, Olaf P. Jenkins edition, Redding sheet, scale 1:250,000.Strand, R.G., 1964, Geologic map of California, Olaf P. Jenkins edition, Weed sheet, scale 1:250,000.Wagner, D.L., and Saucedo, G.J., 1987, Geologic map of the Weed quadrangle, California: California Division of Mines and Geology, Regional Geologic Map Series, Map 4A, scale 1:250,000.Fraticelli, L.A., Albers, J.P., Irwin, W.P., and Blake, M.C., Jr., 1987, Geologic map of the Redding 1 X 2 degree quadrangle, Shasta, Tehama, Humboldt, and Trinity Counties, California: U.S. Geological Survey Open-File Report 87-257, scale 1:250,000.https://pubs.er.usgs.gov/publication/ofr87257 Irwin, W.P., 1994, Geologic map of the Klamath Mountains, California and Oregon: U.S. Geological Survey Miscellaneous Investigations Series Map I-2148, scale 1:500,000.https://pubs.er.usgs.gov/publication/i2148 Miller, M.M., and Harwood, D.S., 1990, Paleogeographic setting of upper Paleozoic rocks in the northern Sierra and eastern Klamath terranes, northern California, in Harwood, D.S., and Miller, M.M., eds., Paleozoic and early Mesozoic paleogeographic relations; Sierra Nevada, Klamath Mountains, and related terranes: Geological Society of America Special Paper 255, p. 175-192.Albers, J.P., and Robertson, J.F., 1961, Geology and ore deposits of East Shasta copper-zinc district, Shasta County, California: U.S. Geological Professional Paper 338, 107 p., scale 1:24,000.https://pubs.er.usgs.gov/publication/pp338 |
| NGMDB product | |
| Counties | Shasta - Siskiyou - Trinity |