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Trujillo Formation

Trujillo Formation
State Texas
Name Trujillo Formation
Geologic age Phanerozoic | Mesozoic | Triassic-Late
Comments Conglomerate, sandstone, and shale. Conglo sandy, composed of granules and pebbles of quartz, limest., sandst., siltst., minor chert, and frags of petrified wood, massive, gray, brown. Sandst is conglomeratic, contains grains of ls, micaceous, calc. locally, crossbedded to massive. Shale micaceous, thin interbeds, gray and red. Thickness 75 ft.
Primary rock type fine-grained mixed clastic
Secondary rock type sandstone
Other rock types
Lithologic constituents
Sedimentary > Clastic > Mixed-clastic > Conglomerate-sandstone (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, 1983, Tucumcari Sheet, Geologic Atlas of Texas, Bureau of Economic Geology, University of Texas at Austin, scale 1:250,000.
Counties Hartley - Oldham - Potter