Jackson Group (undifferentiated)

Light gray to brown liginitic clays with thin interbeds of limonitic sands or lignite; near base,calcareous, glauconitic, and fossiliferous beds may weather to black soil.
State Louisiana
Name Jackson Group (undifferentiated)
Geologic age Eocene
Lithologic constituents
Unconsolidated > Fine-detrital > Clay (Bed)
Sedimentary > Coal > Lignite (Bed)
Unconsolidated > Coarse-detrital > Sand (Bed)

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

NGMDB product
Counties Caldwell - Catahoula - Grant - La Salle - Natchitoches - Sabine - Winn