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Vicksburg Group (undifferentiated)

brown to gray liginitic clays with thin interbeds of lignite or micaceous sands; calcareous shale, petrified wood, and bluish fossilferous clay locally.
StateLouisiana
NameVicksburg Group (undifferentiated)
Geologic agePhanerozoic | Cenozoic | Tertiary | Oligocene
Original map labelOv
Primary rock typeclay or mud
Secondary rock typecoal
Other rock typessand; shale
Lithologic constituents
Major
Sedimentary > Coal (Bed)
Unconsolidated > Fine-detrital > Clay (Bed)
Minor
Sedimentary > Clastic > Mudstone > Shale (Calcareous)
Unconsolidated > Coarse-detrital > Sand (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/.
Geographic coverageCatahoula - Grant - La Salle - Natchitoches - Sabine - Vernon

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