| State | Texas |
|---|---|
| Name | Goodland Limestone and Walnut Clay, undivided |
| Geologic age | Early Cretaceous; Comanchean Series |
| Lithologic constituents |
Major
Sedimentary > Carbonate > Limestone (Bed)
Minor
Sedimentary > Clastic > Mudstone > Claystone (Bed)
|
| Comments | Goodland Limestone intergradational laterally with Comanche Peak Ls. and differs from it chifly in that the Goodland is more coarsely nodular, contains fewer and thinner clay beds, and massive resistant ls. beds are more numerous; upper 5 ft massive, bioclast-packed aphanitic ls and ls. compose of oolites in sparry calcite; thickness 90 +- ft. Walnut Clay clay and limestone about equally abdt. Limest. aphanitic, in part bioclastic. Clay fossilif., calcar., olive brown, weathers yell-brn. Thickness 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, 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 - Johnson - Montague - Parker - Tarrant - Wise |