Usage:
Asotin Member of Saddle Mountains Basalt of Columbia River Basalt Group (ID*,WA*)
Asotin Member of Saddle Mountains Basalt of /Yakima basalt subgroup [informal] of Columbia River Basalt Group (ID*,WA*)
[Yakima basalt subgroup considered informal and should not be capitalized. "Subgroup" not recognized as a formal stratigraphic rank term (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). Columbia River Basalt Group adopted by the ID, OR, and WA Geol. Surveys, and the USGS (rules suspended).]
Geologic age:
late Tertiary (middle Miocene)*
Type section, locality, area and/or origin of name:
Type locality: roadcuts along Cloverland Grade, in NE/4 SE/4 sec. 26, NW/4 SW/4 sec. 25, and SW/4 SW/4 sec. 25, T. 10 N., R. 45 E., 5 km southwest of Asotin, Asotin quadrangle, Asotin Co., extreme southeast WA (Swanson and others, 1979; name credited to V.E. Camp, 1976, PhD thesis).
AAPG geologic province:
Eastern 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 ([ ]).