Usage:
Yazoo Clay of Jackson Group (AL*,LA*,MS*)
Yazoo Formation of Jackson Group (AL*,LA*,MS*)
Yazoo Formation (TX)
Subunits:
(alphabetical): Cocoa Sand Member (AL*,MS*), North Twistwood Creek Clay Member (AL,MS) or North Twistwood Creek Member (AL*,MS*), Pachuta Marl Member (AL*,MS*), Shubuta Clay Member (MS) or Shubuta Member (AL*,LA?,MS*), Tullos Member (LA), Verda Member (LA).
Geologic age:
early Tertiary (late Eocene)*
Type section, locality, area and/or origin of name:
Named from exposures in bluff of Yazoo River at Yazoo City, Yazoo Co., MS (US geologic names lexicons, USGS Bull. 896, 1200).
AAPG geologic province:
Mid-Gulf Coast basin*
Gulf Coast basin*
Arkla basin
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 ([ ]).