Usage:
De Chelly Sandstone of Cutler Group (AZ*,CO*,NM*,UT)
De Chelly Sandstone Member of Cutler Formation (AZ*,CO,NM*,UT*)
Spelled DeChelly in early reports.
Subunits:
FORMATION STATUS (alphabetical) --all in AZ: Black Creek Member*, Fort Defiance Member, Hunters Point Member, Oak Springs Member, White House Member.
Geologic age:
early Permian (Leonardian)*
Type section, locality, area and/or origin of name:
[Named from exposures in Canyon de Chelly, Canyon de Chelly National Monument, Navajo Indian Reservation, Apache Co., northeastern AZ.]
AAPG geologic province:
Black Mesa basin*
Paradox basin*
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 ([ ]).