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: Walcott Glen section G, [extends from head of Walcott Glen (not an official name of U.S. Board on Geographic Names), approx. Lat. 36 deg. 15 min. 40 sec. N., Long. 111 deg. 52 min. 34 sec. W. upslope to near top of Nankoweap Butte, approx. Lat. 36 deg. 15 min. 55 sec. N., Long. 111 deg. 52 min. 55 sec. W., southeastern corner Point Imperial 7.5-min quadrangle], eastern Grand Canyon, Grand Canyon National Park, Coconino Co., northern AZ (Ford and Breed, 1973).
Named from Walcott Glen [unofficially named by Ford and Breed, 1973; see their figs. 1, 10], which branches northwest from the lower parts of Kwagunt Canyon to head on the southeastern slopes of Nankoweap Butte, [Nankoweap Mesa and Point Imperial 7.5-min quadrangles], eastern Grand Canyon, Grand Canyon National Park, Coconino Co., northern AZ (Ford and Breed, 1973).
AAPG geologic province:
Plateau sedimentary 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 ([ ]).