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National Geologic Map Database

Geologic Unit: Thoreau

Usage:

Thoreau Formation of San Rafael Group (NM)


Geologic age:

Jurassic


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

Type section (also is type locality): exposures along cliffs north of town of Thoreau, in secs. 9 and 17, T. 14 N., R. 13 W., west edge of Thoreau quadrangle, McKinley Co., NM. Named from town of Thoreau (Smith, 1954).


AAPG geologic province:

San Juan 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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).