Usage:
Apache Creek Sandstone Member of Pierre Shale (CO*)
Originally called Apache Sandstone.
Geologic age:
Late Cretaceous (Campanian)*
Type section, locality, area and/or origin of name:
Notable exposures in Walsenburg district, eastern CO (Lavington, 1933).
Reference section: on west-facing valley wall, on east side of valley tributary to North Apache Creek, in SE/4 sec. 30, T. 25 S., R. 67 W., Huerfano Co., CO (Scott and Cobban, 1963).
AAPG geologic province:
Las Vegas-Raton 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 ([ ]).