Edwards and Comanche Peak Limestones, undivided (TXKec;0)

State	Texas
Name	Edwards and Comanche Peak Limestones, undivided
Geologic age	Phanerozoic \| Mesozoic \| Cretaceous-Early
Original map label	Kec
Comments	Edwards 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 type	limestone
Secondary rock type	dolostone (dolomite)
Other rock types	chert
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 coverage	Bell - Travis - Williamson