Usage:
French Valley Granodiorite (WA*)
Geologic age:
Cretaceous or Eocene*
Type section, locality, area and/or origin of name:
Roadcuts along Route 10A, east of Omak, about 0.3 mi west of where Route 10A crosses Haley Creek, in SE/4 sec. 7, T. 33 N., R. 28 E., Omak Lake 15-min quadrangle, Okanogan Co., WA (Goodge and Hansen, 1994).
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 ([ ]).