Paleozoic marine rocks, undivided, unit 9 (Western Klamath Mountains)

Undivided Paleozoic metasedimentary rocks. Includes slate, sandstone, shale, chert, conglomerate, limestone, dolomite, marble, phyllite, schist, hornfels, and quartzite
State California
Name Paleozoic marine rocks, undivided, unit 9 (Western Klamath Mountains)
Geologic age Devonian to Jurassic
Lithologic constituents
Tectonite > Melange (Melange)Disrupted chert, argillite, volcanic rocks, and clastic sedimentary rocks containing blocks of limestone, marble, and amphibolite
Sedimentary > Chemical > Chert (Bed)
Igneous > Volcanic > Mafic-volcanic
Sedimentary > Clastic > Sandstone (Bed)
Metamorphic > Metasedimentary > Metaclastic > Argillite
Sedimentary > Clastic > Mudstone (Bed)
Metamorphic > Metasedimentary > Metacarbonate > MarbleBlocks in melange
Metamorphic > AmphiboliteBlocks in melange
Sedimentary > Carbonate > Limestone (Melange)Blocks in melange
Metamorphic > Metasedimentary > Metaclastic > Quartzite
Metamorphic > Metasedimentary > Metaclastic > Phyllite
Sedimentary > Clastic > Conglomerate (Bed)
Metamorphic > Schist
Igneous > Volcanic > Felsic-volcanic
Comments Western Klamath Mountains. Structurally complex sedimentary, metasedimentary, volcanic, and metavolcanic rocks assigned to the Fort Jones, North Fork, Hayfork, and Rattlesnake Creek terranes of Irwin (1994). Includes abundant melange
Stratigraphic units Stuart Fork Fm., Hayfork Bally Meta-andesite

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.

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.

Blake, M.C., Jr., Harwood, D.S., Helley, E.J., Irwin, W.P., Jayko, A.S., and Jones, D.L., 1999, Geologic map of the Red Bluff 30' x 60' quadrangle, California: U.S. Geological Survey Geologic Investigations Series Map I-2542, 15 p., scale 1:100,000.

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.

Irwin, W.P., 1981, Tectonic accretion of the Klamath Mountains, in Ernst, W.G., ed., The geotectonic development of California (Rubey Volume 1): Englewood Cliffs, N.J., Prentice-Hall, p. 29-49.

Irwin, W.P., 1977, Review of Paleozoic rocks of the Klamath Mountains, in Stewart, J.H., Stevens, C.H., and Fritsche, A.E., eds., Paleozoic paleogeography of the western United States: Society of Economic Paleontologists and Mineralogists, Pacific Section, Pacific Coast Paleogeography Symposium 1, p. 441-454.

NGMDB product
Counties Del Norte - Humboldt - Shasta - Siskiyou - Tehama - Trinity