Escondido Formation (TXKes;0)

State	Texas
Name	Escondido Formation
Geologic age	Phanerozoic \| Mesozoic \| Cretaceous-Late [Gulfian]
Original map label	Kes
Comments	shale, siltstone, and sandstone; shale gray to bluish gray; siltst. brn-yell, thin bedded; sandst. fine grained calcareous, in part asphaltic, argillaceous, gray, flaggy bedded; thickness 200-875 ft, thins westward.
Primary rock type	shale
Secondary rock type	siltstone
Other rock types	sandstone
Lithologic constituents	Major Sedimentary > Clastic > Mudstone > Shale > Black-shale (Bed) Minor Sedimentary > Clastic > Sandstone (Bed) Sedimentary > Clastic > Siltstone (Bed)
Map references	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
Unit references	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, 1977, Del Rio Sheet, Geologic Atlas of Texas, University of Texas, Bureau of Economic Geology, scale 1:250,000. Bureau of Economic Geology, 1974, San Antonio Sheet, Geologic Atlas of Texas, University of Texas, Bureau of Economic Geology, scale 1:250,000.
Geographic coverage	Bexar - Kinney - Maverick - Medina - Uvalde - Zavala