Usage:
/Nason Ridge Migmatitic Gneiss (WA*)
[Use of simple lithic terms is preferred (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021)]
Geologic age:
Late Cretaceous*
Type section, locality, area and/or origin of name:
Exposures on Nason Ridge, at and in the vicinity of Lat. 47 deg. 47 min. 00 sec. N., Long. 121 deg. 01 min. 00 sec. W, Labyrinth Mtn. 7.5-min quadrangle, Chelan Co., WA (Tabor and others, 2002).
AAPG geologic province:
Cascades 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 ([ ]).