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. Overlain by 1-9 meters of loess.
State Louisiana
Name Vicksburg Group (undifferentiated)
Geologic age Oligocene
Lithologic constituents
Unconsolidated > Fine-detrital > Silt (Eolian-loess)
Unconsolidated > Fine-detrital > Clay (Bed)
Unconsolidated > Coarse-detrital > Sand (Bed)
Sedimentary > Clastic > Mudstone > Shale (Calcareous)
Sedimentary > Coal > Lignite (Bed)
Comments Where overlain by loess, this unit has a red dotted overlay pattern on the source map. Polygons for this unit in our coverage which should have the loess overlay pattern are designated by "-l" being added to the base map unit symbol.

Snead, J.I., and Mcculloh, R.P., 1984, Geologic Map of Louisiana: Louisiana Geological Survey, scale 1:500,000.

NGMDB product
Counties Catahoula