Metavolcanic and metasedimentary rocks; Jurassic greenschist-facies metamorphic rocks; western Idaho, Blue Mountains island-arc complex (IDJwm;0)

State	Idaho
Name	Metavolcanic and metasedimentary rocks; Jurassic greenschist-facies metamorphic rocks; western Idaho, Blue Mountains island-arc complex
Geologic age	Jurassic
Original map label	Jw
Comments	Meta-volcanic and volcaniclastic rocks, and volcanic-derived meta-sedimentary and rocks, deposited in an oceanic island-arc complex, and metamorphosed to greenschist facies. Includes metamorphosed andesitic to keratophyric volcaniclastic rocks, rhyolite, argillite, slate, phyllite, siltite, wacke, conglomerate, marble and gypsum.
Primary rock type	greenstone
Secondary rock type	metasedimentary rock
Other rock types	keratophyre; meta-argillite; graywache; meta-conglomerate; meta-rhyolite; marble; evaporite
Lithologic constituents	Major Metamorphic > Metasedimentary (Greenschist)Coon Hollow siltstone, siltite, wacke, conglomerate Incidental Metamorphic > Marble (Greenschist) Sedimentary > Chemical (Lense)gypsum-anhydrite
Map references	Bond, J.G., Kauffman, J.D., Miller, D.A., and Venkatakrishnan, Ramesh, 1978, Geologic map of Idaho: Moscow, Idaho, Idaho Bureau of Mines and Geology, with contributions from U.S. Geological Survey, scale 1:500,000.
Unit references	Bond, J.G., Kauffman, J.D., Miller, D.A., and Venkatakrishnan, Ramesh, 1978, Geologic map of Idaho: Moscow, Idaho, Idaho Bureau of Mines and Geology, with contributions from U.S. Geological Survey, scale 1:500,000. Brooks, H.C., 1979, Geologic map of the Huntington and part of the Olds ferry quadrangle, Baker and Malheur counties, Oregon: Oregon Department of Geology and Mineral Industries Geological Map Series, GMS-13, 1 sheet, scale 1:62,500. Vallier, T.L., 1977, The Permian and Triassic Seven Devils Group, western Idaho and northeastern Oregon: U.S. Geological Survey Bulletin 1437, 58 p. [http://pubs.er.usgs.gov/publication/b1437] Lund, Karen, in press, Geology of the Payette National Forest, Valley, Idaho, Washington and Adams counties, Idaho: U.S. Geological Survey Professional Paper 1666, scale 1:100,000. [http://pubs.er.usgs.gov/publication/pp1666]
Geographic coverage	Adams - Washington