Usage:
Colgate Member of Fox Hills Sandstone (MT*,ND*,SD,WY)
Colgate Member of Fox Hills Formation (ND)
Colgate lithofacies (informal) in Iron Lightning Member of Fox Hills Formation (ND*,SD*)
For informal usage, the rank or lithologic term should not be capitalized.
Geologic age:
Late Cretaceous (Maastrichtian)*
Type section, locality, area and/or origin of name:
Named from exposures near Colgate Station on the Northern Pacific RR, in T. 15 N., R. 55 E., Dawson Co., eastern MT (Calvert, 1912).
Typically developed btw. Colgate Station and Glendive, [Glendive quadrangle (scale 1:250,000), 1909 ed.], Dawson Co., eastern MT (Thom and Dobbin, 1924).
AAPG geologic province:
Williston 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 ([ ]).