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Kiamichi Formation

Kiamichi Formation
StateTexas
NameKiamichi Formation
Geologic agePhanerozoic | Mesozoic | Cretaceous-Early [Comanchean]
Original map labelKki
CommentsKiamichi--clay and limestone in alternating units 0.1-5 ft thick; some sandstone. Clay, calcareous, olive brown, about 2/3 of formation. Limestone, mostly aphanitic and bioclastic, fetid, nodular-weathering. Sandstone fine-grained, mod.well sorted, calcareous, burrowed, beds 0.1-0.2 ft thick. Marine fossils are Gryphaea, some Pecten in sandstone. Thickness of Kiamichi Fm 20-50 ft thins southward in Dallas Sheet (1972).
Primary rock typeclay or mud
Secondary rock typelimestone
Other rock typessandstone
Lithologic constituents
Major
Unconsolidated > Fine-detrital > Clay (Bed)
Minor
Sedimentary > Clastic > Sandstone (Bed)
Sedimentary > Carbonate > Limestone (Bed)
Map references
Bureau of Economic Geology, 1992, Geologic Map of Texas: University of Texas at Austin, Virgil E. Barnes, project supervisor, Hartmann, B.M. and Scranton, D.F., cartography, scale 1:500,000
Unit references
Bureau of Economic Geology, 1972, Dallas sheet, Geologic Atlas of Texas, Bureau of Economic Geology, University of Texas at Austin, scale 1:250,000.
Bureau of Economic Geology, 1967, Sherman Sheet, Geologic Atlas of Texas: University of Texas at Austin, Bureau of Economic Geology, scale 1:250,000.
Bureau of Economic Geology, 1983, Lubbock Sheet, Geologic Atlas of Texas: University of Texas at Austin, Bureau of Economic Geology, scale 1:250,000.
Freeman, V.L., 1964, Geologic map of the Indian Wells quadrangle, Terrell and Brewster Counties, Texas: U.S. Geological Survey Miscellaneous Investigations Series Map I-395.
Geographic coverageBailey - Cooke - Denton - Grayson - Lamb - Lynn - Montague - Parker - Tarrant - Wise

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