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National Geologic Map Database

Geologic Unit: Massacre

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 ([ ]).