Usage:
Poplar River Formation (MN)
Poplar River Formation of Coleharbor Group (ND)
Geologic age:
Quaternary (Pleistocene)
Type section, locality, area and/or origin of name:
Type section: Snake Curve South section, right bank of Red Lake River, Red Lake Falls area, in SW/4 NW/4 SW/4 sec. 18, T. 151 N., R. 44 W., Red Lake Falls 15-min quadrangle, Red Lake Co., northwestern MN (Harris and others, 1974, p. 36-37).
Named from Poplar River, Brooks Lake 7.5-min quadrangle, Red Lake 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 ([ ]).