Aguja Formation

Aguja Formation
State Texas
Name Aguja Formation
Geologic age Late Cretaceous
Lithologic constituents
Major
Unconsolidated > Fine-detrital > Clay (Bed)
Incidental
Sedimentary > Coal > Lignite (Bed)
Sedimentary > Clastic > Sandstone (Bed)
Comments Clay, sandstone, and lignite. Upper--continental deposits up to 880 ft thick. Argillaceous sandstone crossbedded. clay in part calcar.; freshwater limestone scarce; a few lignite beds. Vertebrate fossils and petrified wood common. Lower part transition down to marine beds. thickness 175 - 500+ ft. Exposed in Bofecillos area, Big Bend N.P.
References

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.

NGMDB product
Counties Brewster - Culberson