Usage:
Chopaka Intrusive Complex (WA)
Geologic age:
Permian(?)
Triassic, Late [metamorphic age]
Type section, locality, area and/or origin of name:
Not stated. Origin of name not stated by author, but probably named from occurrence on Mt. Chopaka, WA (Daly, 1906).
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 ([ ]).