Usage:
Granite Park Member of Helena Formation of Piegan Group of Belt Supergroup (MT)
Geologic age:
Mesoproterozoic
Type section, locality, area and/or origin of name:
Cliffs of the Continental Divide southeastward from Granite Park, Glacier National Park, MT, where strata are crossed by trail to the dike above Grinnell Glacier. Well exposed in Hole-in-the-Wall Basin, near Boulder Peak, and on trail from Alderson to Carthew Lakes, Waterton Lakes National Park (Fenton and Fenton, 1937) .
AAPG geologic province:
Northern Rocky Mountain region
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 ([ ]).