Carboniferous and Permian volcanic rocks (WACPv;0)

State	Washington
Name	Carboniferous and Permian volcanic rocks
Geologic age	Devonian to Permian; Triassic in Asotin County
Original map label	PMPmv
Comments	Doyle Creek Formation, Wild Sheep Creek Formation and Coon Hollow Formation located in southeastern Asotin County; this area also includes a small outcrop of unmetamorphosed to slightly metamorphosed granodiorite, quartz diorite, and gabbro (Schuster and others, 1997) and is consolidated under "plutonic" in the lithology coding along with possible gabbro and diorite in the Chilliwack Group.
Primary rock type	greenstone
Secondary rock type	andesite
Other rock types	chert; argillite; basalt; limestone; graywacke; keratophyre; black shale; conglomerate; plutonic rock (phaneritic)
Lithologic constituents	Major Metamorphic > Greenstone (Zeolitic (prehnite-pumpellyite))Pillow basalt, breccia, tuff, and flow in Hozomeen Group; breccia and tuff in Chilliwack Group. Includes metabasalt in Asotin County. Partly metamorphosed to prehnite-pumpellyite facies in Hozomeen Group. Minor Igneous > Volcanic > Mafic-volcanic > Andesite (Volcaniclastic, volcanic breccia)Primarily outcrops in Okanogan County; some andesite in Chilliwack Formation. Also includes andesite flow and tuff in subordinate amounts. Incidental Igneous > PlutonicIncludes granodiorite, quartz diorite, and gabbro in Asotin County; possibly gabbro and diorite in Chilliwack Group. Sedimentary > Clastic > Conglomerate (Bed)Limited to Asotin County. Sedimentary > Clastic > Mudstone > Shale > Black-shale (Bed)Limited to Coon Hollow Formation. Metamorphic > MetavolcanicIncludes keratophyre in Asotin County. Sedimentary > Clastic > Sandstone > Graywacke (Bed) Sedimentary > Carbonate > Limestone (Bed)Possibly minor in rank (occurs in Hozomeen Group and outcrops in Asotin and Stevens Counties). Igneous > Volcanic > Mafic-volcanic > Basalt (Flow) Metamorphic > ArgillitePossibly minor in rank. May be partly metamorphosed to prehnite-pumpellite facies in Hozomeen Group but occurs associated with greenstone throughout unit. Sedimentary > Chemical > Chert (Bed)Possibly minor in rank; occurs primarily in Hozomeen Group.
Map references	Huntting, M. T., Bennett, W. A. G., Livingston, V. E. Jr., Moen, W. S., 1961, Geologic Map of Washington: Washington Division of Mines and Geology, scale 1:500,000.
Unit references	Huntting, M. T., Bennett, W. A. G., Livingston, V. E. Jr., Moen, W. S., 1961, Geologic Map of Washington: Washington Division of Mines and Geology, scale 1:500,000. Schuster, J. E., Gulick, C.W., Reidel, S. P., Fecht, K. R., Zurenko, S., 1997, Geologic Map of Washington--Southeast Quadrant: Washington Division of Geology and Earth Resources Geologic Map GM-45, scale 1:250,000. Reidel, S. P., Hooper, P. R., Webster, G. D., Camp, V. E., 1992, Geologic Map of Southeastern Asotin County, Washington: Washington Division of Geology and Earth Resources Geologic Map GM-40, scale 1:48,000. Misch, P., 1977, Bedrock Geology of the North Cascades, in Brown, E. H. and Ellis, R. C. (eds.), Geological Excursions in the Pacific Northwest, Geological Society of America 1977 Annual Meeting, Seattle: Western Washington University, p. 1-62. Joseph, N. L., 1990a, Geologic Map of the Colville 1:100,000 Quadrangle, Washington-Idaho: Washington Division of Geology and Earth Resources Open File Report 90-13, 78 p., 1 pl. Dragovich, J. D., Logan, R. L., Schasse, H. W., Walsh, T. J., Lingley, W. S., Jr., Norman, D. K., Gerstel, W. J., Lapen, T. J., Schuster, J. E., Meyers, K. D., 2002, Geologic Map of Washington-Northwest Quadrant: Washington Division of Geology and Earth Resources Geologic Map GM-50, scale 1:250,000. Tabor, R. W., Haugerud, R. A., Booth, D. B., Brown, E. H., 1994, Preliminary Geologic Map of the Mount Baker 30- by 60-Minute Quadrangle, Washington: U. S. Geological Survey Open File Report 94-403, 55p., 2 pls. [http://pubs.er.usgs.gov/publication/ofr94403]
Geographic coverage	Asotin - Okanogan - Skagit - Stevens - Whatcom