Usage:
No current usage.
(†/Trail Creek Granite (CO) replaced with "Virginia Dale ring-dike complex". See Virginia Dale.)
[Preoccupied. Name previously applied to Trail Creek Formation of Ross (1934) in ID.]
Geologic age:
Mesoproterozoic
Type section, locality, area and/or origin of name:
Type locality: near Livermore-Tie siding area, in northern Front Range-southern Laramie Range, CO-WY (Eggler, 1967).
AAPG geologic province:
not stated
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 ([ ]).