Usage:
No current usage.
(†Balfour Formation (CO) replaced with Antero Formation. See Antero.)
Geologic age:
early Tertiary (early Oligocene)
Type section, locality, area and/or origin of name:
[Type area:] best exposed north of Balfour in T. 13 S., R. 75 W. Scattered outcrops occur within area extending from R. 74 to R. 76 W., and from T. 14 to T. 12 S., Park Co., central CO (Stark and others, 1949).
AAPG geologic province:
South Park 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 ([ ]).