Usage:
Wenatchee Formation (WA*)
Geologic age:
Tertiary
Oligocene, early*
Type section, locality, area and/or origin of name:
Type section: outcrop on the northwest flank of Squilchuck Canyon in the foothills southwest of Wenatchee, in SE/4 sec. 21, SW/4 sec. 22, NW/4 sec. 27, and NE/4 sec. 28, T. 22 N., R. 20 E., Chelan Co., WA. Four reference sections are designated (Gressens 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 ([ ]).