Plympton Formation of Park City Group (NV*,UT*)
Permian, Early*
Named from exposures on Millard and Plympton Ridges, Juab and Millard Cos., UT (Hose and Repenning, 1959).
Paradox basin
Great Basin 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 ([ ]).