Usage:
Old Breastworks Formation of Wilcox Group (AR*,MO*,TN*)
Geologic age:
Tertiary*
Paleocene*
Type section, locality, area and/or origin of name:
Type section (subsurface): depth-interval 509 to 595 m, Fort Pillow test well, at site of old Fort Pillow on Mississippi River, Lat. 35 deg. 38 min. 39 sec. N., Long. 89 deg. 49 min. 35 sec. W., Lauderdale Co., TN (Moore and Brown, 1969).
AAPG geologic province:
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 ([ ]).