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Tertiary (1) sedimentary rocks in southwestern Utah

State Utah
Name Tertiary (1) sedimentary rocks in southwestern Utah
Geologic age Late Paleocene to Early Oligocene
Comments non-marine, Claron 165 to 640 m (2100 ft); upper part is Brian Head and has volcaniclastics
Primary rock type limestone
Secondary rock type mudstone
Other rock types fine-grained mixed clastic; conglomerate; tuff
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone (Bed)pink member, or lower member, is considered largely a sequence of stacked paleo-soil horizons; white limestone, upper member, massive limestone
Sedimentary > Clastic > Mudstone (Bed)
Minor
Sedimentary > Clastic > Mixed-clastic (Bed)
Sedimentary > Clastic > Mixed-clastic (Tuffaceous)Brian Head Formation at top of Claron; records earliest volcanic activity
Sedimentary > Clastic > Conglomerate (Bed)basal red and purple conglomerate; Grand Castle Formation
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.
Franczyk, K.J., Fouch, T.D., Johnson, R.C., Molenaar, C.M., and Cobban, W.A., 1992, Cretaceous and Tertiary paleogeographic reconstructions for the Uinta-Piceance Basin study area, Colorado and Utah: U.S. Geological Survey Bulletin 1787-Q, 37 p.
Ott, A.L., 1999, Detailed stratigraphy and stable isotope analysis of the Claron Formation, Bryce Canyon National Park, Southwestern Utah: Washington State University, Pullman, Washington, M.S. thesis, 130 p.
Goldstrand, P.M., 1994, Tectonic development of Upper Cretaceous to Eocene strata of southwestern Utah: Geological Society of America Bulletin, v. 106, p. 145-154.
Taylor, W.J., 1993, Stratigraphic and lithologic analysis of the Claron Formation in southwestern Utah: Utah Geological Survey Miscellaneous Publication 93-1, 52 p.
Sable, E.G., and Maldonado, F., 1997, The Brian Head Formation (revised) and selected Tertiary sedimentary rock units, Markagunt Plateau and adjacent areas, southwestern Utah, in Maldonado, F., and Nealey, L.D., Geologic Studies in the Basin and Range-Colorado Plateau Transition in Southeastern Nevada, Southwestern Utah, and Northwestern Arizona, 1995: U.S. Geological Survey Bulletin 2153, p. 5-26.
Counties Garfield - Iron - Kane - Piute - Washington