U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database

Geologic Unit: Church Rock

Usage:

Church Rock Member of Chinle Formation (AZ*,CO*?,UT*)


Subunits:

(alphabetical): Bowknot Bed (UT), Hite Bed (AZ*,UT*).


Geologic age:

Late Triassic*


Type section, locality, area and/or origin of name:

Type section: about 4 mi north of Church Rock, on Comb Ridge, and about 6.5 mi northeast of Kayenta, Navajo Co., AZ. Origin of name not stated by authors, but probably named from Church Rock (Stewart and others, 1972).


AAPG geologic province:

Black Mesa basin*
Paradox 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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).