May Creek Schist

Layered amphibolite, schist, gneiss, and quartzite. Protolith considered to be of Paleozoic age
State Oregon
Name May Creek Schist
Geologic age Paleozoic(?) to Jurassic
Lithologic constituents
Major
Metamorphic > Schist (Amphibolite)Includes quartz-biotite schist and quartzofeldspathic schist
Metamorphic > Amphibolite (Amphibolite)Includes amphibole schist, metaporphyry, metadiorite, and metagabbro
Incidental
Metamorphic > Metasedimentary > Metaclastic > Quartzite (Amphibolite)
Comments Unit consists of a structurally higher subunit of metasedimentary rocks (May Creek Schist) and a structurally lower subunit of amphibolite as mapped by Irwin (1994).
References

Walker, G.W. and MacLeod, N.S., 1991, Geologic map of Oregon: U.S. Geological Survey, scale 1:500,000.

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.

https://pubs.er.usgs.gov/publication/i2148

Donato, M.M., 1992, Geologic guide for the northern Klamath Mountains--part 2, Red Mountain to Bald Mountain (May Creek Schist and related rocks): Oregon Geology, v. 54, no. 2, p. 34-39.

NGMDB product
Counties Douglas - Jackson - Josephine