|Geologic age||Late Cretaceous; Gulfian Series|
Sedimentary > Clastic > Mudstone > Claystone (Bed)
|Comments||In Kinney and Maverick Cos., TX, Clay, sl. calcareous, dark gray to greenish gray; weathers yell-gray; marine megafossils include Exogyra ponderosa; thickness as much as about 500 ft, thins northward. Lowest part of Taylor Group.|
|Stratigraphic units||Taylor Group|
Dumble, E.T., 1892, Notes on the geology of the valley of the middle Rio Grande: Geological Society of America Bulletin v. 3, p. 219-230.
Bureau of Economic Geology, 1976, Crystal City-Eagle Pass 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 - Maverick|