Usage:
Franson Member of Park City Formation (CO*,ID*,MT*,UT*,WY*)
Franson Tongue of Park City Formation (CO*,ID*,MT*,UT*,WY*)
Geologic age:
middle Permian (early to middle Guadalupian; Roadian to Wordian)*
Type section, locality, area and/or origin of name:
Named from exposures on north side of Franson Canyon near the mouth, in S/2 SE/4 sec. 15, and N/2 NE/4 sec. 22, T. 1 S., R. 6 E., Summit Co., eastern UT (Cheney, IN McKelvey and others, 1956, 1959).
AAPG geologic province:
Bighorn basin*
Great Basin province*
Green River basin*
Montana folded belt*
Snake River basin*
Uinta basin*
Uinta uplift*
Wasatch uplift*
Wind River basin*
Yellowstone province*
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 ([ ]).