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Wilcox Group (undifferentiated)

gray to brown lignitic sands and silty to sandy lignitic clays, many seams of lignite; some limestone and glauconite.
State Louisiana
Name Wilcox Group (undifferentiated)
Geologic age Phanerozoic | Cenozoic | Tertiary | Paleocene
Comments Includes Carrizo Sand (Calibone Group?) outcrops.
Primary rock type sand
Secondary rock type clay or mud
Other rock types coal; limestone
Lithologic constituents
Major
Unconsolidated > Coarse-detrital > Sand (Bed)
Unconsolidated > Fine-detrital > Clay (Bed)
Minor
Sedimentary > Carbonate > Limestone (Bed)
Map references
United States Geological Survey, 1998, Digital Overlay of the Geologic Map of Louisiana: U.S. Geological Survey, Biological Resources Division, National Wetlands Research Center, Product Id USGS-NWRC 1984-02-0001, http://www.nwrc.usgs.gov/.
Unit references
United States Geological Survey, 1998, Digital Overlay of the Geologic Map of Louisiana: U.S. Geological Survey, Biological Resources Division, National Wetlands Research Center, Product Id USGS-NWRC 1984-02-0001, http://www.nwrc.usgs.gov/.
Counties Bienville - Bossier - Caddo - De Soto - Natchitoches - Red River - Webster - Winn