Usage:
St. Hilaire Formation (MN)
St. Hilaire Formation of Coleharbor Group (ND)
Geologic age:
Quaternary (Pleistocene)
Type section, locality, area and/or origin of name:
Type section: Powerline section, left bank of Red Lake River, Red Lake Falls area, in SE/4 SE/4 NE/4 sec. 5, T. 151 N., R. 43 W., Red Lake Falls 15-min quadrangle, Red Lake Co., northwestern MN (Harris and others, 1974, North Dakota Geol. Survey Misc. Ser., no. 52, p. 32).
Reference sections, in Red Lake Falls area, Red Lake Falls 15-min quadrangle, Red Lake Co., northwestern MN (Harris and others, 1974, p. 32-33, 37-38): (1) Opernockity section, left bank of Red Lake River, in SE/4 NE/4 SE/4 sec. 32, T. 152 N., R. 43 W.; and (2) Small Creek section, in SE/4 SW/4 sec. 17, T. 152 N., R. 43 W.
Named from village of St. Hilaire, in sec. 6, T. 152 N., R. 43 W., Thief River Falls 7.5-min quadrangle, Pennington Co., northwestern MN (Harris and others, 1974).
AAPG geologic province:
Sioux uplift
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 ([ ]).