| State | Oregon |
|---|---|
| Name | Colebrooke Schist |
| Geologic age | Paleozoic or Mesozoic |
| Lithologic constituents |
Major
Metamorphic > Schist > Pelitic-schist (Greenschist)Pelitic schist transitional between greenschist and blueschist grade
Incidental
Metamorphic > Metaigneous > Metavolcanic > MetabasaltIncludes metamorphosed pillow lavas, breccias, and pyroclastic rocks
Sedimentary > Chemical > Chert (Bed)
|
| Comments | Considered part of Pickett Peak Terrane by Blake and others (1985). |
| References | Walker, G.W. and MacLeod, N.S., 1991, Geologic map of Oregon: U.S. Geological Survey, scale 1:500,000.Coleman, R.G., 1972, The Colebrooke Schist of southwestern Oregon and its relation to the tectonic evolution of the region: U.S. Geological Survey Bulletin 1972, 61 p.https://pubs.er.usgs.gov/publication/b1972 Blake, M.C., Jr., Engebretson, D.C., Jayko, A.S., and Jones, D.L., 1985, Tectonostratigraphic terranes in southwest Oregon, in Howell, D.G., ed., Tectonostratigraphic terranes of the circum-Pacific region: Circum-Pacific Council for Energy and Mineral Resources Earth Science Series, v. 1, p. 147-158.Dott, R.H., Jr., 1971, Geology of the southwestern Oregon coast west of the 124th meridian: Oregon Department of Geology and Mineral Industries Bulletin 69, 63 p. |
| NGMDB product | |
| Counties | Curry |