Sandstone, limestone, and shale; Upper Triassic marine to non-marine epicontinental deposits; southeastern Idaho (IDTRu;0)

State	Idaho
Name	Sandstone, limestone, and shale; Upper Triassic marine to non-marine epicontinental deposits; southeastern Idaho
Geologic age	Late Triassic
Original map label	TRu
Comments	In southeastern Idaho, Wood shale tongue of upper Ankareh Fm overlies Higham grit and Deadman Limestone of lower Nugget Fm
Primary rock type	shale
Secondary rock type	siltstone
Other rock types	limestone; sandstone; chert
Lithologic constituents	Major Sedimentary > Clastic > Mudstone > Shale (Bed)Wood shale, bright red Minor Sedimentary > Clastic > Sandstone (Bed)Higham grit, conglomeratic Sedimentary > Carbonate > Limestone (Bed)Deadman limestone, gray-blue Sedimentary > Clastic > Siltstone (Bed)siltstone in Wood shale Incidental Sedimentary > Chemical > Chert (Lense)chert in Deadman limestone
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. Oriel, S.S., and Platt, L.B., 1980, Geologic map of the Preston 1o x 2o quadrangle, southeastern Idaho and western Wyoming: U.S. Geological Survey Miscellaneous Investigations Series, Map I-1127, scale 1:250,000. [http://pubs.er.usgs.gov/publication/i1127] Isaacson, P.E., 1983, Stratigraphic correlation of the Paleozoic and Mesozoic rocks of Idaho: Moscow, Idaho, Idaho Bureau of Mines and Geology, Information Circular 37. Mansfield, G.R., 1916, Subdivisions of the Thaynes Limestone and Nugget Sandstone, Mesozoic, in the Fort Hall Indian Reservation, Idaho: Washington Academy of Sciences Journal, v. 6., p. 31-42. Cressman, E.R., 1964, Geology of the Georgetown Canyon-Snowdrift Mountain area, southeastern Idaho: U.S. Geological Survey Bulletin 1153, 105 p. [http://pubs.er.usgs.gov/publication/b1153]
Geographic coverage	Bear Lake - Caribou