Geologic Unit: Meyer Ridge

Usage:

Meyer Ridge member (informal) of Grande Ronde Basalt of Columbia River Basalt Group (ID*,WA*)
Meyer Ridge member (informal) of Grande Ronde Basalt of /Yakima basalt subgroup [informal] of Columbia River Basalt Group (ID*,WA*)

Informal. The rank or lithologic term should not be capitalized. [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 (early Miocene)*

Type section, locality, area and/or origin of name:

[Type locality: northern end of Meyer Ridge, south of confluence of George and Pintler Creeks, about 3 mi southwest of Asotin, in SW/4 sec. 36, T. 10 N., R. 45 E., western edge of Asotin 7.5-min quadrangle, Asotin Co., eastern WA (V.E. Camp, 1976, Washington State Univ. PhD thesis, p. 52-53, fig. 12; see Reidel and others, 1989).]
Reference locality: along Patrick Grade, southeast of Dayton in the Blue Mountains, in T. 9 N., R. 40 and 41 E., at border of Eckler Mtn., Panjab Creek, and Cahill Mtn. 7.5-min quadrangles, [Columbia Co.], eastern WA (Reidel and others, 1989).

AAPG geologic province:

Eastern Columbia basin*