Usage:
Box Butte Formation of Ogallala Group (NE)
Subunits:
(alphabetical) --all in NE: Dawes Clay Member, Red Valley Member.
Geologic age:
late Tertiary (Miocene; Hemingfordian NALMA)
Type section, locality, area and/or origin of name:
Type section: in sec. 27, T. 28 N., R. 49 W., [southside of South Branch Sand Canyon (Dry Creek), bdry. btw. Box Butte Reservoir East and Hemingford 7.5-min quadrangles], Box Butte Co., northwestern NE (Cady, 1940; see also Cady and Scherer, 1946, USGS Water-Supply Paper 969, and Galusha, 1975).
Principal reference section: in SW/4 sec. 22, T. 28 N., R. 49 W., [northside of South Branch Sand Canyon (Dry Creek), east of County Road 68, approx. Lat. 42 deg. 23 min. 02 sec. N., Long. 103 deg. 01 min. 49 sec. W.], southeastern corner Box Butte Reservoir East 7.5-min quadrangle, Box Butte Co., northwestern NE (Galusha, 1975).
AAPG geologic province:
Chadron arch
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 ([ ]).