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*
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 ([ ]).