Vicksburg group and Chickasawhay limestone (MSOGv;0)

Vicksburg group and Chickasawhay limestone - Chickasawhay limestone, sandy limestone, and sand, present only in eastern MS (mapped with it is the overlying Paynes Hammock sand of Miocene age); Vicksburg group, predominantly limestone and marl, but contains some bentonite and near the top, chocolate-colored clay and some sand.

State	Mississippi
Name	Vicksburg group and Chickasawhay limestone
Geologic age	Oligocene
Original map label	Ov
Primary rock type	limestone
Secondary rock type	sand
Other rock types	bentonite; clay or mud
Lithologic constituents	Major Sedimentary > Carbonate > Limestone Minor Unconsolidated > Coarse-detrital > Sand Unconsolidated > Marl Incidental Unconsolidated > Fine-detrital > ClayChocolate-colored clay. Sedimentary > Clastic > Mudstone > Claystone > BentoniteVicksburg group, predominantly limestone and marl, but contains some bentonite.
Map references	Moore, William Halsell, 1969, reprinted 1985, Geologic Map of Mississippi, Compiled by Bicker, A. R., Jr., a revision of the geologic map published by the MS Geological Survey in 1945 in cooperation with the USGS, revised from data submitted by Dr. E. E. Russell of MS State University from published reports of the MS Geological Survey and from field revisions, Mercury Maps Inc., Jackson, MS.
Unit references	Moore, William Halsell, 1969, reprinted 1985, Geologic Map of Mississippi, Compiled by Bicker, A. R., Jr., a revision of the geologic map published by the MS Geological Survey in 1945 in cooperation with the USGS, revised from data submitted by Dr. E. E. Russell of MS State University from published reports of the MS Geological Survey and from field revisions, Mercury Maps Inc., Jackson, MS.
Geographic coverage	Claiborne - Clarke - Hinds - Issaquena - Jasper - Jones - Madison - Rankin - Smith - Warren - Wayne - Yazoo