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Reklaw Formation, Carrizo Sand, and Wilcox and Midway Groups, undivided

Reklaw Formation, Carrizo Sand, and Wilcox and Midway Groups, undivided
State Texas
Name Reklaw Formation, Carrizo Sand, and Wilcox and Midway Groups, undivided
Geologic age Phanerozoic | Cenozoic | Tertiary | Paleocene Eocene
Comments from top down: about 30-40 ft of quartz sand and silty clay, about 50 ft of quartz sand, about 700 ft of silty and sandy clay containing local beds of clay, lignite, silt and quartz sand; about 500-600 ft of clay.
Primary rock type fine-grained mixed clastic
Secondary rock type coal
Other rock types
Lithologic constituents
Major
Sedimentary > Clastic > Mixed-clastic > Sandstone-Mudstone (Bed)
Incidental
Sedimentary > Coal > Lignite (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, 1974, Austin Sheet, Geologic Atlas of Texas, University of Texas, Bureau of Economic Geology, scale 1:250,000.
Counties Smith