Metasedimentary and meta-igneous rocks; Triassic to Mississippian greenschist-facies dismembered ophiolite, western Idaho, Blue Mountains island-arc complex (IDTRMwm;0)

State	Idaho
Name	Metasedimentary and meta-igneous rocks; Triassic to Mississippian greenschist-facies dismembered ophiolite, western Idaho, Blue Mountains island-arc complex
Geologic age	Triassic to Mississippian
Original map label	Jwm
Comments	TRMm -- Phyllite and chert of the Baker terrane (Mesozoic and Paleozoic) of ID038. The structurally dismembered Baker terrane is interpreted as an oceanic ophiolite assemblage, which is faulted eastward, over the Jurassic Izee terrane. On ID108, TRMm includes Permian Burnt River Schist, Permian Elkhorn Ridge Argillite, and Paleozoic rocks, undivided. Triassic radiolarians, Permian fusulinids, and Permian to Carboniferous conodonts, fusulinids, and megafossils indicate a Triassic to Mississippian age range.
Primary rock type	meta-argillite
Secondary rock type	chert
Other rock types	marble; greenstone; greenschist; quartzite
Lithologic constituents	Minor Metamorphic > Greenstone (Greenschist)greenstone after basalt and gabbro of ophiolite assemblage Metamorphic > Argillitebedded argillite of ophiolite assemblage Metamorphic > Marble (Greenschist)limestone-marble lenses in ophiolite assemblage Sedimentary > Chemical > Chert (Bed)metamorphosed radiolarian chert of ophiolite assemblage Metamorphic > Phyllite (Greenschist)phyllite after argillite of ophiolite assemblage Incidental Metamorphic > Metavolcanic (Greenschist)metamorphosed mafic pillows and tuffs of ophiolite assemblage Metamorphic > Quartzite (Greenschist)quartzite beds in ophiolite assemblage Metamorphic > Schist (Greenschist)greenschist after aquagene mafic tuff of ophiolite assemblage
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. 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] Mitchell, V.E. and Bennett, E.H., Geologic map of the Baker quadrangle, Idaho: Moscow, Idaho, Idaho Bureau of Mines and Geology, Geologic Map Series, Baker 2o Quadrangle, scale 1:250,000. Murchey, B.L., and Jones, D.L., 1994, The environmental and tectonic significance of two coeval Permian radiolarian-sponge associations in eastern Oregon: in Vallier, T.L., and Brooks, H.C., eds., Geology of the Blue Mountains Region of Oregon, Idaho, and Washington; Stratigraphy physiography, and mineral resources of the Blue Mountains region: U.S. Geological Survey Professional Paper 1439, p. 183-198. [http://pubs.er.usgs.gov/publication/pp1439]
Geographic coverage	Washington