Usage:
Popo Agie Formation (CO*?)
Popo Agie Formation of Chugwater Group (WY*)
Popo Agie Member of Chugwater Formation (WY*)
Subunits:
FORMATION STATUS (alphabetical) --all in CO*?,WY*: Brynt Draw Member, Lyons Valley Member.
Geologic age:
Triassic, Late*
Type section, locality, area and/or origin of name:
Named from exposures on Popo Agie River, near Lander and east end of Wind River Mountains, Fremont Co., WY (Knight, 1901).
Reference locality established at Dallas anticline, in SE/4 sec. 13 and SW/4 sec. 12, T. 32 N., R. 99 W., Fremont Co., WY (Pipiringos, 1968).
AAPG geologic province:
Yellowstone province*
Green River basin*
Wind River basin*
Bighorn 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 ([ ]).