Usage:
Arvison Formation (CA)
Geologic age:
Early Jurassic
Type section, locality, area and/or origin of name:
Type area: extends from point on Kosk Creek about 1.75 mi south of Arvison Flat to point about 1 mi north of Arvison Flat at contact with underlying Triassic beds, [Big Bend 7.5-min quadrangle, Shasta National Forest], Shasta Co., northern CA (Sanborn, 1960).
Named from Arvison Flat on Kosk Creek, [in sec. 12, T. 37 N., R. 1 W., approx. Lat. 41 deg. 04 min. 12 sec. N., Long. 121 deg. 55 min. 29 sec. W., Big Bend 7.5-min quadrangle, Shasta National Forest], Shasta Co., northern CA (Sanborn, 1960).
AAPG geologic province:
Klamath Mountains 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 ([ ]).