Usage:
Beverly Member of Ellensburg Formation (OR*,WA*)
Subunits:
Prosser Bed (WA).
Geologic age:
late Tertiary (middle Miocene)*
Type section, locality, area and/or origin of name:
Type section: southeast of Sentinel Gap, in NW/4 sec. 23, T. 15 N., R. 23 E., Columbia River, southern Grant Co., southeastern WA (Bingham and Grolier, 1966).
Probably named from Beverly, Grant Co., WA (Mackin, 1961; name credited to Twiss, 1933 unpub. 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 ([ ]).