Usage:
No current usage?
(†White Porphyry (CO) replaced with Pando Porphyry? Uncertain if White Porphyry or Pando Porphyry is the preferred name of the CO Geol. Survey. See also Pando. Abandoned by the USGS.)
Geologic age:
Late Cretaceous
Type section, locality, area and/or origin of name:
Not synopsized to date.
AAPG geologic province:
Eagle 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 ([ ]).