Usage:
Eckler Mountain Member of Wanapum Basalt of Columbia River Basalt Group (OR*,WA*)
Eckler Mountain Member of Wanapum Basalt of /Yakima basalt subgroup [informal] of Columbia River Basalt Group (OR*,WA*)
(†Eckler Mountain Member not used by the OR Geol. Survey.)
[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).]
Subunits:
(alphabetical) --all in OR*,WA*; all informal: basalt of Dodge, basalt of Robinette Mountain, basalt of Shumaker Creek.
Geologic age:
late Tertiary (middle Miocene)*
Type section, locality, area and/or origin of name:
Type locality: south and southeast side of Eckler Mountain (misspelled Echler Mountain on Pullman 1- x 2-degree sheet), about 17 km southeast of Dayton, in N/2 sec. 26 and N/2 sec. 27, T. 9 N., R. 40 E., Eckler Mountain quadrangle, Columbia Co., WA (Swanson and others, 1979).
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 ([ ]).