Usage:
Iron Lightning Member of Fox Hills Formation (ND*,SD*)
Subunits:
(alphabetical) all informal: Bullhead lithofacies (SD*), Colgate lithofacies (SD*).
Geologic age:
Late Cretaceous (Maastrichtian)*
Type section, locality, area and/or origin of name:
In Badlands, 5 km southeast of Indian village of Iron Lightning. Extends over 3 sq mi, in parts of secs 20, 28, 29, 32, and 33, T. 14 N., R. 19 E., and sec. 4, T. 13 N., R. 19 E., Ziebach Co., SD. Named from Indian village of Iron Lightning on Moreau River (Waage, 1968).
Reference section: in sec. 9, T. 14 N., R. 19 E. (Waage, 1968).
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 ([ ]).