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undivided part Fredericksberg Group

undivided part Fredericksberg Group
State Texas
Name undivided part Fredericksberg Group
Geologic age Phanerozoic | Mesozoic | Cretaceous-Early
Comments calcareous clay, argillaceous limestone, marl, and shale about 100 ft in Waco Sheet (1970)
Primary rock type clay or mud
Secondary rock type limestone
Other rock types mudstone; shale
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Claystone (Bed)
Minor
Unconsolidated > Marl (Bed)
Sedimentary > Carbonate > Limestone (Bed)
Sedimentary > Clastic > Mudstone > 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, 1970, Waco Sheet, Geologic Atlas of Texas, University of Texas, Bureau of Economic Geology, scale 1:250,000.
Counties Bosque - Brown - Comanche - Coryell - Erath - Hamilton - Hill - Hood - Johnson - Lampasas - McLennan - Mills - Somervell