Usage:
Walcott Member of Kwagunt Formation of Chuar Group of Grand Canyon Supergroup (AZ*)
Geologic age:
Neoproterozoic*
Type section, locality, area and/or origin of name:
Type section: head of Walcott Glen and upper part of Nankoweap Butte, west of Colorado River, eastern Grand Canyon, Lat. 36 deg. 15 min. 00 sec. N., Long. 115 deg. 00 min. 00 sec. W, 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 ([ ]).