Usage:
Big Bend Ridge Rhyolite (ID*)
Subunits:
(alphabetical) --all in ID*; all informal*: Bishop Mountain flow, Blue Creek flow, Green Canyon flow, Headquarters flow.
Geologic age:
Quaternary*
Pleistocene*
Type section, locality, area and/or origin of name:
Type area: exposed thickness on the caldera scarp at the base of Bishop Mountain, in the Island Park area, Fremont Co., eastern ID (Christiansen, 1982).
AAPG geologic province:
Snake River 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 ([ ]).