|Name||Del Rio Clay|
|Geologic age||Late Cretaceous|
Unconsolidated > Marl (Bed)
Sedimentary > Carbonate > Limestone (Bed)
|Comments||Calcareous to gypsiferous, nodular marl and marly limestone, pyrite common, blocky, med gray, weathers lt-gray to lt- yellowish-gray, contains lenses of calcar siltst., marine megafossils include abdt Exogyra arietina and other pelecypods; thickness as much as 200 ft in Del Rio Sheet (1977) feathers out northwestward.|
Bureau of Economic Geology, 1981, Llano sheet, Geologic Atlas of Texas, Bureau of Economic Geology, University of Texas at Austin, scale 1:250,000.
Bureau of Economic Geology, 1977, Del Rio 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.
|Counties||Kinney - Uvalde - Val Verde|