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National Geologic Map Database

NGMDB

Geologic Unit: Exeter

Usage:

Exeter Sandstone (NM*,OK*,TX?)
Exeter Member of Entrada Sandstone of San Rafael Group (NM)


Geologic age:

Middle Jurassic (Callovian)*


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

Named from exposures near Exeter Post Office, Union Co., northeastern NM (Lee, 1902).
[Correct spelling of town is Exter. Name of town changed to Johnson, which was (no longer exists) located in northeast corner of county, just south of CO line (USGS GNIS database; Bob Julyan, compiler, 1992, NM Geog. Names Database).]
Type section: [just south of Steamboat Butte], in SW/4 SW/4 SE/4 sec. 28, T. 32 N., R. 35 E., Union Co., northeastern NM (Lucas and others, 1987).


AAPG geologic province:

Sierra Grande uplift*
Palo Duro basin*
Las Vegas-Raton basin*


NGMDB

For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 ([ ]).

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Page Last Modified: Tue Jun 3 17:08:00 2014