Usage:
Antero Formation (CO*)
Geologic age:
early Tertiary (Oligocene)*
Type section, locality, area and/or origin of name:
[Type area:] south and west of Hartsel in T. 12 to 15 S., R. 75 and 76 W.; occupies several long, narrow, and partly connected basins in the Precambrian north-northeast of Hartsel, in T. 10 and 11 S., R. 74 and 75 W., Park Co., central CO (Johnson [abs.], 1937; Stark and others, 1949).
[Antero Reservoir located a few mi southwest of Hartsel, in T. 12 S., R. 76 W., Antero Reservoir 7.5-min quadrangle, Park Co., central CO.]
AAPG geologic province:
Denver basin*
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 ([ ]).