Usage:
Newby Group (WA)
Newby Formation (WA)
Subunits:
GROUP STATUS (alphabetical) --all in WA: Buck Mountain Formation, Twisp Formation.
Geologic age:
Early(?) or Middle(?) Jurassic to Early Cretaceous
Type section, locality, area and/or origin of name:
Type locality: along Lookout Ridge from forest lookout tower, in sec. 35 [unsurveyed], T. 33 N., R. 21 E., [Twisp West 7.5-min quadrangle, 2006 ed.], west to Black Pine Lake, in sec. 36 [unsurveyed], T. 33 N., R. 20 E., [Hoodoo Peak 7.5-min quadrangle, 2006 ed.], about 6 mi southwest of Twisp, Okanogan Co., Okanogan National Forest, central northern WA (Barksdale, 1948, 1975).
Named from Newby Ridge [a few mi north-northwest of type locality, Hoodoo Peak 7.5-min quadrangle (2006 ed.), Okanogan Co., Okanogan National Forest, central northern WA] (Barksdale, 1948).
AAPG geologic province:
Northern Cascade Range-Okanagan province
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 ([ ]).