Usage:
Nahahum Canyon Member of Chumstick Formation (WA*)
Geologic age:
Tertiary
Eocene, middle(?)*
Type section, locality, area and/or origin of name:
Type section: north of Leavenworth on east flank of Eagle Creek anticline, about 0.5 km east of Van Creek Road and extending for 1.3 km along the Eagle Creek Road, in secs. 13 and 24, T. 25 N., R. 18 E., and in sec. 19, T. 25 N., R. 19 E., Chelan Co., WA. Named from Nahahum Canyon northeast of Cashmere (Gresens and others, 1981).
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 ([ ]).