USGS - science for a changing world

Mineral Resources On-Line Spatial Data

Trujillo Formation

Trujillo Formation
NameTrujillo Formation
Geologic agePhanerozoic | Mesozoic | Triassic-Late
Original map labelTRj
CommentsConglomerate, 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 typefine-grained mixed clastic
Secondary rock typesandstone
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.
CountiesHartley - Oldham - Potter

Show this information as [XML] - [JSON]

AccessibilityFOIAPrivacyPolicies and Notices logoU.S. Department of the Interior | U.S. Geological Survey
Page Contact Information: Peter Schweitzer