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Usage:
Dawes Clay Member of Box Butte Formation of Ogallala Group (NE)
Geologic age:
late Tertiary (Miocene; Hemingfordian NALMA)
Type section, locality, area and/or origin of name:
Type section: on C.W. Moody's Pebble Creek Ranch, on east side of Pebble Creek, in NW/4 NW/4 sec. 14, T. 30 N., R. 49 W., [Coffee Mill Butte SE 7.5-min quadrangle], Dawes Co., northwestern NE (Galusha, 1975).
Reference sections (northwestern NE): (1) roadcut on west side of road to Box Butte Reservoir, about 6.5 mi north of Hemingford, in SE/4 NE/4 sec. 7 [fig. 13B states btw. secs. 7 and 8], T. 28 N., R. 49 W., Box Butte Reservoir East 7.5-min quadrangle, Box Butte Co.; (2) roadcut on east side of NE State Highway 2, in SW/4 NW/4 sec. 29, T. 28 N., R. 51 W., Marsland 15-min quadrangle, Box Butte Co.; (3) at Shimek bench mark, U.S. Coast and Geodetic Survey Triangulation Station 1934, in NE/4 SW/4 sec. 26, T. 28 N., R. 52 W., Marsland 15-min quadrangle, Box Butte Co.; and (4) north of Mansfield Ranch bldg. site, in NW/4 SW/4 sec. 31, T. 30 N., R. 52 W., [Dead Mans Creek 7.5-min quadrangle], Dawes Co. (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 ([ ]).