Usage:
Steamboat Rock Basalt (ID*)
Geologic age:
Tertiary
Pliocene*
or
Quaternary
Pleistocene*
Type section, locality, area and/or origin of name:
Type section: cliff in Smith Prairie, in NE/4 SW/4 sec. 28, T. 2 N., R. 7 E., Elmore Co., ID. Named from nearby Steamboat Rock, in sec. 4, T. 1 N., R. 7 E. (Howard and Shervais, 1973).
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 ([ ]).