Usage:
McKay Formation of Dalles Group (OR*)
Geologic age:
Tertiary
Miocene, late*
Pliocene, early*
Type section, locality, area and/or origin of name:
Not designated.
Reference sections: (1) McKay Reservoir section, in E/2 sec. 33, T. 2 N., R. 32 E., Umatilla Co., OR; (2) Mission section, north-facing roadcut in NW/4 NE/4 NE/4 sec. 12, T. 2 N., R. 32 E., Umatilla Co., OR (Farooqui and others, 1981).
AAPG geologic province:
Columbia basin*
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 ([ ]).