Usage:
No current usage.
(†Hell Gate Porphyry (CO) is facies of St. Kevin Granite. See St. Kevin.)
Geologic age:
Mesoproterozoic
Type section, locality, area and/or origin of name:
Not stated. Well exposed at Hell Gate Narrows, 5 mi west of divide on Lake Fork-Ivanhoe section, Lake Fork-Ivanhoe region, central CO (Stark and Barnes, 1932).
AAPG geologic province:
Southern 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 ([ ]).