Usage:
Esquatzel Member of Saddle Mountains Basalt of Columbia River Basalt Group (WA*)
Esquatzel Member of Saddle Mountains Basalt of /Yakima basalt subgroup [informal] of Columbia River Basalt Group (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: 1 km north of Mesa, on hillslope on north side of Esquatzel Coulee, from 223 to 241 m elevation, in NW/4 NW/4 sec. 25, T. 13 N., R. 30 E., Mesa quadrangle, Franklin Co., southeastern WA (Swanson and others, 1979).
Reference locality: on south side of the Coulee, in SW/4 NW/4 sec. 25, T. 13 N., R. 30 E., Mesa quadrangle, Franklin Co., southeastern 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 ([ ]).