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NGMDB

Geologic Unit: Entrada

Usage:

Entrada Sandstone of San Rafael Group (AZ*,CO*,NM*,UT*)


Subunits:

(alphabetical): Cannonville Member (UT), Cow Springs Member (AZ*), Dewey Bridge Member (CO*,UT*), Escalante Member (UT), Exeter Member (NM), Gunsight Butte Member (UT), Iyanbito Member (NM*), Moab Member (CO*,UT*) or Moab Tongue (CO*,UT*), Red Mesa Member (AZ,NM,UT), Rehoboth Member (AZ*,CO*,NM*,UT*), Slick Rock Member (CO*,UT*).


Geologic age:

late Middle Jurassic (early to middle Callovian)*


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

Type section: Entrada Point, northern San Rafael Swell, Emery Co., UT. Named from Entrada Point (Gilluly and Reeside, 1928).
Principal reference section measured at Pine Creek in SW/4 sec. 29 and SE/4 sec. 30, T. 24 S., R. 3 E., Garfield Co., UT (Peterson, 1988).


AAPG geologic province:

Anadarko basin*
Black Mesa basin*
Denver basin*
Great Basin province
Green River basin*
Las Vegas-Raton basin
Paradox basin*
Piceance basin*
Plateau sedimentary province*
San Juan basin*
Sierra Grande uplift*


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 17:04:09 2014