Usage:
Tonasket Gneiss (WA*)
Geologic age:
early Eocene and Paleocene*
Type section, locality, area and/or origin of name:
Type area: the layered gneiss best exposed between Wagonroad Coulee and Tunk Mountain to the east. Type area, about 14 mi long agrees with best exposures as specified by Snook (1965). Occurs in T. 35 and 36 N., E/2 R. 26, 27, 28, and W/2 29 E., in southeast Conconully, south Tonasket, and south west Aenaes Valley 15-min quadrangles, Okanogan Co., WA (Fox and others, 1976).
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 ([ ]).