|Name||Pinto Canyon Formation|
|Geologic age||Permian; Leonard and Guadalupe Series|
Sedimentary > Carbonate > Limestone (Bed)
Sedimentary > Clastic > Mixed-clastic > Sandstone-mudstone (Bed)
Sedimentary > Chemical > Chert (Bed)
|Comments||from top down: siltstone, bituminous, pyritic, cherty, dolomitic, contain ls concretions, microgranular, 1-inch chert nodules, dk gray. 93 ft thick; Limestone, microgranular, bituminous, massive, dk gray, interbedded with chert, laminated, pyritic, bituminous, thickness 170 ft. Chert, cherty ls, microgranular ls, calcar ss, and cherty ss in irreg. beds. formed as submarine slide blocksl thickness 110-170 ft. at base chert, med bedded, dk gray and ls, microgranular, interbedded with siltstone, thickness 95-170 ft|
Bureau of Economic Geology, 1979, Emory Peak--Presidio Sheet, Geologic Atlas of Texas, University of Texas at Austin.
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.