Usage:
Slate Peak Member of Virginian Ridge Formation (WA)
Geologic age:
late Early to early Late Cretaceous (Albian to Cenomanian)
Type section, locality, area and/or origin of name:
West of Winthrop on Wolfe Creek [in secs. 35 and 36, T. 35 N., R. 20 E., Thompson Ridge 7.5-min quadrangle, Okanogan Co., WA] (Trexler, 1985).
AAPG geologic province:
Northern Cascade Range-Okanagan 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 ([ ]).