Usage:
Duppa Member of Galeros Formation of Chuar Group of Grand Canyon Supergroup (AZ*)
Geologic age:
Neoproterozoic*
Type section, locality, area and/or origin of name:
Type section: below Duppa Butte, Kwagunt Canyon, eastern Grand Canyon, Lat. 36 deg. 15 min. 00 sec. N., Long. 111 deg. 50 min. 00 sec. W., Vishnu Temple quadrangle, Coconino Co., AZ (Ford and Breed, 1973).
AAPG geologic province:
Southern Rocky Mountain region*
Plateau sedimentary province*
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 ([ ]).