Usage:
Vicksburg Group (AL*,MS*,LA*,GA)
Vicksburg Formation (LA*,TX*)
Subunits:
(Eastern Region only): Bumpnose Limestone (AL), Red Bluff Clay (AL,MS), Forest Hill Sand (AL,MS), Mint Spring Marl (MS*,AL*), Marianna Limestone (AL*,MS*,GA), Glendon Limestone (AL*,MS*,GA), Byram Formation (AL*,LA*,MS*), Bucatunna Clay (MS*,AL*)
Geologic age:
Tertiary*
Oligocene, early*
Rupelian
Type section, locality, area and/or origin of name:
Not designated. Named from exposures at Vicksburg, MS (Conrad, 1847).
AAPG geologic province:
Mid-Gulf Coast basin*
Gulf Coast basin*
South Georgia sedimentary province
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates published by U.S. Geological Survey authors.
"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).
Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).