Usage:
Geode Creek Basalt (WY)
Geologic age:
late Tertiary (Miocene and/or Pliocene)
Type section, locality, area and/or origin of name:
Notable exposures in two small patches, one east of Geode Creek and other about 1 mi northwest of Crescent Hill, Yellowstone National Park, northwestern WY. The southern patch, the higher of the two, reaches elevation between 7,300 and 7,400 ft (Howard, 1937).
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 ([ ]).