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Mineral Resources On-Line Spatial Data

Edwards and Comanche Peak Limestones, undivided

Edwards and Comanche Peak Limestones, undivided
StateTexas
NameEdwards and Comanche Peak Limestones, undivided
Geologic agePhanerozoic | Mesozoic | Cretaceous-Early
Original map labelKec
CommentsEdwards Limstone, limestone, dolostone, and chert. limest. aphanitic to fine grained, massive to thin bedded, hard, brittle, in part rudistid biostromes, much miliolid biospartie; dolostone fine to v. fine grained, porous, med gray to grayish brown; chert, nodules and plates common. 60-350 ft thick, thins northward. Comanche Peak Limestone fine to v. fine grained, fairly hard, nodular, lt. gray weathers white, extensively burrowed. Thickness as much as 80 ft.
Primary rock typelimestone
Secondary rock typedolostone (dolomite)
Other rock typeschert
Lithologic constituents
Major
Sedimentary > Carbonate > Dolostone (Bed)
Sedimentary > Carbonate > Limestone (Bed)
Incidental
Sedimentary > Chemical > Chert (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, 1974, Austin Sheet, Geologic Atlas of Texas, University of Texas, Bureau of Economic Geology, scale 1:250,000.
Geographic coverageBell - Travis - Williamson

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