Usage:
San Isabel Granite of Berthoud Plutonic Suite (CO*)
Geologic age:
Mesoproterozoic*
Type section, locality, area and/or origin of name:
Not designated (Boyer, 1962).
Type area: in Wet Mountains, Huerfano and Pueblo Cos., CO, and in south-central CO (Tweto, 1987).
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 ([ ]).