Usage:
Little Jacks Rhyolite (ID*-recognized locally in Owyhee Co.)
Geologic age:
Tertiary*
Miocene*
Type section, locality, area and/or origin of name:
Exposures on east wall of Little Jacks Canyon at junction of large tributary (local usage Rattlesnake Creek), in SW/4 sec. 5, T. 9 S., R. 3 E., 35 km south of Grand View, Owyhee Co., ID. Named from Little Jacks Creek Canyon (Ekren and others, 1984).
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 ([ ]).