| State | Texas |
|---|---|
| Name | Duck Creek Limestone and Kiamichi Formation, undivided |
| Geologic age | Early Cretaceous |
| Lithologic constituents |
Major
Sedimentary > Carbonate > Limestone (Bed)
Minor
Sedimentary > Clastic > Mudstone > Claystone (Bed)
Incidental
Sedimentary > Clastic > Sandstone (Bed)
|
| Comments | Duck Creek--Limestone, aphanitic, in part bioclastic, locally burrowed, pyrite nodules up to 0.2 ft, beds 0.2-2 ft thick, pinch and swell, md. gray to yell gray; weathers dk gray with yell-brn patches. marine megafossils are Gryphaea and ammonites; thickness 30-100 ft. Kiamichi--clay and limestone in alternating units 0.1-5 ft thick; some sandstone. |
| 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, 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 | Bailey - Hockley - Lamb - Lynn |