Santa Elena Limestone, Sue Peaks Formation, Del Carmen Limestone, and Telephone Canyon Formation, undivided (TXKst;0)

State	Texas
Name	Santa Elena Limestone, Sue Peaks Formation, Del Carmen Limestone, and Telephone Canyon Formation, undivided
Geologic age	Phanerozoic \| Mesozoic \| Cretaceous-Early
Original map label	Kst
Comments	Santa Elena Limestone forms cliffs over Sue Peaks Formation. Santa Elena Ls is lt-gray to white, fine-grained to microgranular, massive, beds to 10 ft thick, some marl interbeds, chert nodules and silicified rudistids common in massive beds. Thickness about 350-450+ft. Sue Peaks Formation is gray aphanitic limestone and interbedded yell-gray shale thickness 75 -250 ft. Occupies slope between overlying Santa Elena Ls and underlying Del Carmen Ls. Del Carmen Ls is gray limestone aphanitic to fine grained, massive, chert nodules, weathers brown; rudistids and milliolids common. thickness 350-475 ft. Telephone Canyon Fm is yell-gray, marly, nodular limestone, marine fossils common thickness about 75 ft in Big Bend N.P.
Primary rock type	limestone
Secondary rock type	shale
Other rock types
Lithologic constituents	Major Sedimentary > Carbonate > Limestone (Bed) Minor Sedimentary > Clastic > Mudstone > Shale > Black-shale (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, 1977, Del Rio Sheet, Geologic Atlas of Texas, University of Texas, Bureau of Economic Geology, scale 1:250,000. Bureau of Economic Geology, 1979, Emory Peak--Presidio Sheet, Geologic Atlas of Texas, University of Texas at Austin.
Geographic coverage	Brewster - Presidio