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Schist of various types and ages, unit 7 (Klamath Mountains)

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Schists of various types; mostly Paleozoic or Mesozoic age; some Precambrian.
State California
Name Schist of various types and ages, unit 7 (Klamath Mountains)
Geologic age Devonian
Lithologic constituents
Major
Metamorphic > Schist (Amphibolite)Includes quartz-mica schist and calc-schist (Abrams Mica Schist)
Metamorphic > Amphibolite (Amphibolite)Main rock type in Salmon Horneblende Schist
Minor
Metamorphic > Metasedimentary > Metacarbonate > Marble (Amphibolite)Associated with schist in Abrams Mica Schist
Comments Central Metamorphic Terrane of Klamath Mountains. Consists primarily of amphibolite (Salmon Hornblende Schist) and metasedimentary schist (Abrams Mica Schist = Grouse Ridge Fm.)
Stratigraphic units Abrams Mica Schist, Salmon Hornblende Schist, Grouse Ridge 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

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.

https://pubs.er.usgs.gov/publication/i2542

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

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.

Hacker, B.R., and Peacock, S.M., 1990, Comparison of the Central Metamorphic Belt and Trinity terrane of the Klamath Mountains with the Feather River terrane of the Sierra Nevada, 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. 75-92.

Davis, G.A., Holdaway, M.J., Lipman, P.W., and Romey, W.D., 1965, Structure, metamorphism, and plutonism in the south-central Klamath Mountains, California: Geological Society of America Bulletin, v. 76, p. 933-966.
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Counties Shasta - Siskiyou - Trinity