Chappo Member of Wasatch Formation (WY*)
late Paleocene to early Eocene*
Type area: near Hogsback Ridge, north of La Barge Creek, extends from Buckman Hollow eastward to exposures in Chappo Gulch, 1 mi southeast of Salli Mine. Named from Chappo Gulch (Oriel, 1962).
Type section (incomplete): Chappo Creek, in NE/4 sec. 17, T. 26 N., R. 113 W., Lincoln Co., southwestern WY (Oriel, 1962).
Reference section [incomplete]: Buckman Hollow, in sec. 12, T. 26 N., R. 114 W., Lincoln Co., southwestern WY (Oriel, 1962).
Green 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 ([ ]).