No current usage.
(†Pillar Falls Mudflow (ID) replaced with Idavada Volcanics. See Idavada.)
Tertiary
Miocene(?)
At Pillar Falls, located on Snake River, in sec. 35, T. 9 S., R. 17 E., Jerome and Twin Falls Co., ID. Named from Pillar Falls (Stearns, Table 1).
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 ([ ]).