Usage:
Windy Flats Group (SD*)
Subunits:
(alphabetical) --all in SD*: Hay Creek Greenstone, Reausaw Slate.
Geologic age:
Paleoproterozoic (Precambrian X)*
Type section, locality, area and/or origin of name:
Named from exposures on Windy Flats, in SW/4 T. 4 N., R. 4 E., Galena-Roubaix district, 1 mi west of map area, [Deadwood South 7.5-min quadrangle, Lawrence Co., SD] (Bayley, 1972).
Type locality (composite; Reausaw Slate and Hay Creek Greenstone): in sec. 1, T. 3 N., R. 4 E., and in secs. 34 and 35, T. 4 N., R. 4 E., Black Hills, Lawrence Co., SD (US geologic names lexicon, USGS Bull. 1520; Bayley, 1972).
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 ([ ]).