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National Geologic Map Database

Geologic Unit: Boucher

Usage:

[?] Boucher Tongue of Muav Limestone of Tonto Group (AZ-local)
[?] Boucher Tongue of Bright Angel Shale of Tonto Group (AZ-local)
Recognized locally in Grand Canyon.


Geologic age:

Middle Cambrian


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

Notable exposures from vicinity of Garnet Canyon southeastward to Cottonwood Canyon, a distance of 25 mi, Grand Canyon area [Coconino Co., northwestern AZ] (McKee, 1945).


AAPG geologic province:

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 ([ ]).