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Eagle Ford Formation and Buda Limestone, undivided

Eagle Ford Formation and Buda Limestone, undivided
State Texas
Name Eagle Ford Formation and Buda Limestone, undivided
Geologic age Phanerozoic | Mesozoic | Cretaceous-Late
Comments Eagle Ford Fm--Shale, siltstone, and limestone; upper part limest. and shale, ls lt-yellowish-brown, flaggy; lower part, siltst. and v. fine-grained sandst., lt-yellow to gray, laminated flaggy, some limestone, silty, med-brown, laminated, thickness 75-200 ft, thins NEward. Buda Ls--fine grained, bioclastic (mollusk-fragment-bearing), marly interbeds, commonly glauconitic, pyrite, hard, massive lt gray to pale orange; formation is 45-100 ft thick.
Primary rock type fine-grained mixed clastic
Secondary rock type limestone
Other rock types
Lithologic constituents
Major
Sedimentary > Clastic > Mixed-clastic > Siltstone-Mudstone (Bed)
Minor
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, 1974, Austin Sheet, Geologic Atlas of Texas, University of Texas, Bureau of Economic Geology, scale 1:250,000.
Counties Hays - Travis - Williamson