| State | Texas |
|---|---|
| Name | Eagle Ford Formation and Buda Limestone, undivided |
| Geologic age | Late Cretaceous |
| Lithologic constituents |
Major
Sedimentary > Clastic > Mixed-clastic > Siltstone-mudstone (Bed)
Minor
Sedimentary > Carbonate > Limestone (Bed)
|
| 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. |
| References | Bureau of Economic Geology, 1974, Austin Sheet, Geologic Atlas of Texas, University of Texas, Bureau of Economic Geology, scale 1:250,000.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. |
| NGMDB product | |
| Counties | Hays - Travis - Williamson |