Usage:
Carter Canyon Ash Bed of Helvas Canyon Member of Gering Formation of Arikaree Group (NE)
Geologic age:
Miocene
Type section, locality, area and/or origin of name:
Helvas Canyon, east of Carter Canyon and south of Mitchell Pass, 4.3 km west and 9 km south of Gering, in NW/4 NE/4 NW/4 sec. 6, T. 20 N., R. 55 W., Scottsbluff quadrangle, Scotts Bluff Co., NE (Vondra and others, 1969).
AAPG geologic province:
Denver 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 ([ ]).