Shale, arenite, siltstone, limestone, and chert; thrust-bounded Devonian to Ordovician deep-marine-basin deposits; central Idaho (IDDOc;0)

State	Idaho
Name	Shale, arenite, siltstone, limestone, and chert; thrust-bounded Devonian to Ordovician deep-marine-basin deposits; central Idaho
Geologic age	Devonian and Silurian
Original map label	DS; DSc
Comments	new unit DOc = DSc + SOc. Area shown as DSc on Idaho state map corresponds with area symbolized symbolized DSO on map of eastern part of Hailey quad (Link and others, 1995). This unit includes Devonian, Silurian and Ordovician argillaceous rocks, of the Milligen, Trail Creek, and Phi Kappa Fms. Thrust faults bound this assemblage.
Primary rock type	shale
Secondary rock type	arenite
Other rock types	siltstone; limestone; chert
Lithologic constituents	Major Sedimentary > Clastic > Mudstone > Shale > Black-shale (Bed)graptolitic black shale and slabby argillite Minor Sedimentary > Clastic > Sandstone > Arenite (Bed)quartzitic Incidental Sedimentary > Chemical > Chert (Lense) Sedimentary > Carbonate > Limestone (Bed) Sedimentary > Clastic > Siltstone (Bed)siltite
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. Link, P.K., Mahoney, J.B., Bruner, D.J., Batatian, L.D., Wilson, Eric and Williams, F.J.C., 1995, Stratigraphic setting of sediment-hosted mineral deposits in the eastern part of the Hailey 1o x 2o quadrangle and part of the southern part of the Challis 1o x 2o quadrangle, south-central Idaho: in Worl, R.G., Link, P.K., Winkler, G.R., and Johnson, K.M., eds., Geology and mineral resources of the Hailey 1o x 2o quadrangle and the western part of the Idaho Falls 1o x 2o quadrangle, Idaho: U.S. Geological Survey Bulletin 2064-C, p. C1-C33 (includes geologic map, scale 1:100,000), prepared in cooperation with the Idaho Geological Survey, Idaho State University, and University of Idaho. [http://pubs.er.usgs.gov/publication/b2064C] Ross, C.P., 1934, Correlation and interpretation of Paleozoic stratigraphy in south-central Idaho: Geological Society of America Bulletin, v. 45, no. 5, p. 937-1000. Dover, J.H., Berry, W.B.N. and Ross, R.J., Jr., 1980, Ordovician and Silurian Phi Kappa and Trail Creek Formations, Pioneer Mountains, central Idaho: stratigraphic and structural revisions, and new data on graptolite faunas: U.S. Geological Survey Professional Paper 1090, 54 p. [http://pubs.er.usgs.gov/publication/pp1090] Rember, W.C. and Bennett, Earl H., 1979, Geologic map of the Hailey quadrangle, Idaho: Moscow, Idaho, Idaho Bureau of Mines and Geology, Geologic Map Series, Hailey 2o quadrangle, scale 1:250,000.
Geographic coverage	Blaine - Custer