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National Geologic Map Database

Geologic Unit: Meriwitica

Usage:

Meriwitica Tongue of Bright Angel Shale of Tonto Group (AZ*-local)
Meriwitica Member of Bright Angel Shale of Tonto Group (AZ-local)
Meriwitica Member of Lyndon Limestone (AZ-local)
Recognized locally in western Grand Canyon.


Geologic age:

Middle Cambrian*


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

Not designated. Present in western Grand Canyon. Traced along walls of canyon for many miles and extends eastward at least as far as Meriwitica Canyon. Origin of name not stated by author, but probably named from Meriwitica Canyon south of Colorado River, [Coconino and Mohave Cos., 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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).