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Undivided pre-Cenozoic metavolcanic rocks, unit 1 (Southwestern Sierra Nevada)

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Undivided pre-Cenozoic metavolcanic rocks. Includes latite, dacite, tuff, and greenstone; commonly schistose.
State California
Name Undivided pre-Cenozoic metavolcanic rocks, unit 1 (Southwestern Sierra Nevada)
Geologic age Ordovician(?) to Permian(?)
Lithologic constituents
Major
Igneous > Volcanic > Mafic-volcanic > Basalt (Melange)Slabs in melange
Metamorphic > Metaigneous > SerpentiniteMatrix of melange containing slabs of tectonized basalt and gabbro
Minor
Igneous > Plutonic > Gabbroic > GabbroSlabs in melange
Incidental
Sedimentary > Chemical > Chert (Bed)Slabs in melange
Comments Southwestern Sierra Nevada. Primarily basalt and gabbro in Ordovician ophiolite assemblage and late Paleozoic ophiolite melange
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.

Smith, A.R., 1965, Geologic map of California, Olaf P. Jenkins edition, Bakersfield sheet, scale 1:250,000.

Matthews, R.A., and Burnett, J.L., 1966, Geologic map of California, Olaf P. Jenkins edition, Fresno sheet, scale 1:250,000.

Saleeby, J.B., Goodin, S.E., Sharp, W.D., and Busby, C.J., 1978, Early Mesozoic paleotectonic-paleogeographic reconstruction of the southern Sierra Nevada region, in Howell, D.G., and McDougall, K.A., eds., Mesozoic paleogeography of the western United States: Society of Economic Paleontologists and Mineralogists, Pacific Section, Pacific Coast Paleogeography Symposium 2, p. 311-336.

Silberling, N.J., Jones, D.L., Blake, M.C., Jr., and Howell, D.G., 1987, Lithotectonic terrane map of the western conterminous United States: U.S. Geological Survey Miscellaneous Field Studies Map MF-1874-C, scale 1:2,500,000.

https://pubs.er.usgs.gov/publication/mf1874C

Saleeby, J.B., 1990, Geochronological and tectonostratigraphic framework of Sierra-Klamath ophiolitic assemblages, 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. 93-114.
NGMDB product
Counties Fresno - Tulare