Usage:
Peters Gulch ash layer (informal) (ID*)
A stratigraphic marker bed. Informal. The rank or lithologic term should not be capitalized.
Geologic age:
Quaternary*
Pleistocene, early*
Tertiary, late*
Pliocene, late*
Type section, locality, area and/or origin of name:
Named from Peters Gulch, 4 mi southwest of Hagerman, Gooding Co., southwestern ID (Powers and Malde, 1961).
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 ([ ]).