Usage:
Ashnola Gabbro (WA*)
Geologic age:
Cretaceous*
Type section, locality, area and/or origin of name:
Named from Ashnola River in Okanogan Co., [Pasayten Wilderness Area], northernwestern WA. Is an intrusive body approx. 5 mi long and 0.5 mi wide just east of Beaver Creek, Okanogan Co., northernwestern WA; is nearly bisected by International Boundary at approx. Long. 120 deg. 15 min. W. (Staatz and others, 1971).
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 ([ ]).