Usage:
Massacre Volcanics (ID*)
Geologic age:
late Miocene and Pliocene*
Type section, locality, area and/or origin of name:
Type locality: the feeder dikes form Massacre Rocks, a group of knobs of diabase, in center of sec. 6, T. 9 S., R. 30 E., Power Co., southern ID. Named from Massacre Rocks (Stearns, 1936; Stearns and others, 1938).
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 ([ ]).