Usage:
Berger Formation of Wilcox Group (AR*)
Geologic age:
early Tertiary (Eocene)*
Type section, locality, area and/or origin of name:
Type section: south side of Chicago, Rock Island, and Pacific RR tracks on east side of viaduct and road crossing tracks at Brittain siding, 0.75 mi southwest of Berger, in SE/4 SW/4 sec. 5, T. 1 S., R. 12 W., Pulaski Co., central AR (Gordon and others, 1958).
AAPG geologic province:
Ouachita folded belt*
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 ([ ]).