Colebrooke Schist (Mesozoic or Paleozoic) (ORcs;0)

State	Oregon
Name	Colebrooke Schist (Mesozoic or Paleozoic)
Geologic age	Paleozoic or Mesozoic
Original map label	cs
Comments	Considered part of Pickett Peak Terrane by Blake and others (1985).
Primary rock type	pelitic schist
Secondary rock type	meta-basalt
Other rock types	chert
Lithologic constituents	Major Metamorphic > Schist (Greenschist)Pelitic schist transitional between greenschist and blueschist grade Incidental Igneous > Volcanic > Mafic-volcanic > Basalt (Pyroclastic) Sedimentary > Chemical > Chert (Bed) Igneous > Volcanic > Mafic-volcanic > Basalt (Flow, pillows)Includes metamorphosed pillow lavas, breccias, and pyroclastic rocks
Map references	Walker, G.W. and MacLeod, N.S., 1991, Geologic map of Oregon: U.S. Geological Survey, scale 1:500,000.
Unit 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. [http://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.
Geographic coverage	Curry