|Geologic age||Early Cretaceous|
Sedimentary > Clastic > Conglomerate (Bed)
Sedimentary > Clastic > Mudstone > Shale > Black-shale (Bed)
Sedimentary > Carbonate > Limestone (Bed)
|Comments||Mostly conglomerate of gray to blk well-rounded limestone clasts as much as 18 inches across and chert fragments as large as 6 inches in gray and white ls and sparry calcite matrix. some thin beds of sandy shale, sandstone, and ls. Thickness 700 ft+-.|
Bureau of Economic Geology, 1968, Van Horn-El Paso Sheet, Geologic Atlas of Texas: Bureau of Economic Geology, The 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.