Usage:
Demopolis Chalk of Selma Group (AL*,MS*)
Demopolis Formation (MS*,TN*)
Subunits:
Bluffport Marl Member (AL*,MS,TN)
Geologic age:
Late Cretaceous (Campanian to Maastrichtian)*
Type section, locality, area and/or origin of name:
Type locality: bluff of chalk on Tombigbee River at Webb and Sons cotton warehouse in Demopolis, [near Webbs Landing, in NW/4 SW/4 sec. 24, T. 18 N., R. 2 E., Demopolis 7.5-min quadrangle], Marengo Co., western AL (Smith, 1903; Monroe, 1941).
AAPG geologic province:
Black Warrior basin*
Mid-Gulf Coast basin*
Upper Mississippi embayment*
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 ([ ]).