Usage:
Parkman Sandstone Member of Mesaverde Formation (MT*,WY*)
Parkman Sandstone Member of Claggett Formation of Montana Group (MT*)
Parkman Sandstone Member of Judith River Formation of Montana Group (MT*)
Parkman Sandstone of Montana Group (MT*)
Parkman Sandstone Member of Judith River Formation (WY*)
Parkman Sandstone (WY)
Subunits:
FORMATION STATUS (alphabetical): Dead Horse Creek Member (WY), Ferguson Member (WY), Teapot Member (WY).
Geologic age:
Late Cretaceous (Campanian)*
Type section, locality, area and/or origin of name:
Named from exposures near Parkman, Sheridan Co., WY (Darton, 1906).
AAPG geologic province:
Wind River basin*
Powder River basin*
Denver 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 ([ ]).