Fort Worth Limestone and Duck Creek Formation, undivided

Fort Worth Limestone and Duck Creek Formation, undivided
State Texas
Name Fort Worth Limestone and Duck Creek Formation, undivided
Geologic age Early Cretaceous
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone (Bed)
Minor
Unconsolidated > Marl (Bed)
Unconsolidated > Fine-detrital > Clay (Bed)
Comments Fort Worth Limestone, limestone and clay. Ls aphanitic to biosparite, burrowed; marine megafossils are Pecten, oysters, echinoids, and ammonites. Clay, calcareous, in units 0.1-5 ft thick, forms low rolling hills. Thickness 25-35 ft. Duck Creek Ls., limestone and marl. ls med. bedded, nodular to wavy bedded; thickness 25-30 ft.
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, 1970, Waco 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 Cooke - Denton - Grayson - Montague - Tarrant - Wise