Dolostone, limestone, siltstone, arenite, and chert; Devonian and Silurian marine upper continental-slope deposits; east-central and central Idaho; (IDDS;0)

State	Idaho
Name	Dolostone, limestone, siltstone, arenite, and chert; Devonian and Silurian marine upper continental-slope deposits; east-central and central Idaho;
Geologic age	Devonian and Silurian
Original map label	DS; DSc; O
Comments	In east-central Idaho, the stratigraphic units listed above are grouped into the DS unit on the state geologic map.
Primary rock type	dolostone (dolomite)
Secondary rock type	limestone
Other rock types	siltstone; arenite; chert
Lithologic constituents	Major Sedimentary > Carbonate > Dolostone (Bed)commonly fine- to medium-crystalline Minor Sedimentary > Clastic > Siltstone (Bed)calcareous to dolomitic Sedimentary > Carbonate > Limestone (Bed)reefoid and crinoidal in eastern Roberts Mtns Fm Incidental Sedimentary > Chemical > Chert (Lense)abundant in lower 60m of Laketown Dolomite Sedimentary > Clastic > Sandstone > Arenite (Bed)quartzitic
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. Rember, W.C., and Bennett, E.H., 1979, Geologic map of the Dubois quadrangle, Idaho: Moscow, Idaho, Idaho Bureau of Mines and Geology Map Series, Dubois 2o quadrangle, scale 1:250,000. 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] Mapel, W.J., Read, W.H., and Smith, R.K., 1965, Geologic map and sections of the Doublespring quadrangle, Custer and Lemhi Counties, Idaho: U.S. Geological Survey, Map GQ-464, scale 1:62,500. [http://pubs.er.usgs.gov/publication/gq464] Skipp, Betty and Sandberg, C.A., 1975, Silurian and Devonian miogeosynclinal and transitional rocks of the Fish Creek reservoir window, central Idaho: U.S. Geological Survey Journal of Research, v. 3, no. 6, p. 691-706. Dover, J.H., 1983, Geologic map and sections of the central Pioneer Mountains, Blaine and Custer Counties, central Idaho: U.S. Geological Survery Miscellaneous Investigations Series Map I-1319, 1 sheet, scale 1:48,000. Rember, W.C. and Bennett, E.H., 1979, Geologic map of the Challis quadrangle, Idaho: Moscow, Idaho, Idaho Bureau of Mines and Geology, Geologic Map Series, Challis 2o quadrangle, scale 1:250,000.
Geographic coverage	Blaine - Custer - Lemhi - Owyhee