Usage:
South Heart Member of Chadron Formation of White River Group (ND)
Geologic age:
Tertiary
Eocene, late
Type section, locality, area and/or origin of name:
Type section: at Fitterer Ranch in west face of a north-trending ridge, in NW/4 SW/4 NE/4 sec. 7, T. 137 N., R. 97 W., 12 air mi southeast of town of South Heart and 0.5 mi northeast of section given by Stone (1973) for his informal "South Heart member," Stark Co., southwestern ND. Named from town of South Heart (Murphy and others, 1993).
AAPG geologic province:
Williston 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 ([ ]).