Usage:
Big Sand Draw Sandstone Lentil of White River Formation (WY*)
Geologic age:
early Tertiary (late Eocene; Chadronian NALMA)*
Type section, locality, area and/or origin of name:
Type section: north of Wagon Bed Spring, south-central Fremont Co., west-central WY. Named from exposures south of Big Sand Draw anticline in SE/4 sec. 25, T. 32 N., R. 95 W., south-central Fremont Co., west-central WY (Van Houten, 1964).
AAPG geologic province:
Wind River 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 ([ ]).