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Triassic (2) sedimentary rocks in southwestern Utah

State Utah
Name Triassic (2) sedimentary rocks in southwestern Utah
Geologic age Late Triassic
Comments continental, interior basin. Shinarump member coincides with the initiation of the Andean-type margin
Primary rock type mudstone
Secondary rock type conglomerate
Other rock types siltstone
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone (Bed)contains petrified wood, tuffaceous material from west (bentonitic mudstone)
Minor
Sedimentary > Clastic > Conglomerate (Bed)Shinarump Conglomerate Member at base; major for that member
Incidental
Sedimentary > Clastic > Mixed-clastic (Bed)
Map references
Hintze, L.F., 1980, Geologic map of Utah: Utah Geological and Mineral Survey, scale 1:500,000.
Unit references
Hintze, L.F., 1980, Geologic map of Utah: Utah Geological and Mineral Survey, scale 1:500,000.
Biek, R.G., Willis, G.C., Hylland, M.D., and Doelling, H.H., 2000, Geology of Zion National Park, Utah, in Sprinkel, D.A., Chidsey, Jr., T.C., and Anderson, P.B., Geology of Utah's Parks and Monuments: Utah Geological Association Publication 28, p. 107-138.`
Counties Iron - Kane - Millard - Washington