Usage:
Sillem Member of Fowkes Formation (WY*)
Geologic age:
Tertiary*
Eocene, middle(?)*
Type section, locality, area and/or origin of name:
Type section: north of Sage, from about center sec. 5, T. 21 N., R. 119 W., to about center sec. 33, T. 22 N., R. 119 W., Lincoln Co., WY (Oriel and Tracey, 1970).
AAPG geologic province:
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 ([ ]).