Usage:
Junction Butte Basalt (WY*)
Geologic age:
Pliocene*
Type section, locality, area and/or origin of name:
West side of Grand Canyon of Yellowstone River opposite mouth of Deep Creek. Named from prominent butte between Yellowstone and Lamar Rivers, Yellowstone National Park, Park Co., WY (Christiansen and Blank, 1972).
AAPG geologic province:
Yellowstone province*
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 ([ ]).