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National Geologic Map Database

Geologic Unit: Summerville

Usage:

Summerville Formation of San Rafael Group (AZ*,CO*,NM*,UT*)


Subunits:

/White Point Sandstone Member (UT).


Geologic age:

late Middle Jurassic (late Callovian)*


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

Type section: at Summerville Point, near head of Summerville Wash, Emery Co., UT. Named from exposures on Summerville Point (Gilluly and Reeside, 1928).


AAPG geologic province:

Paradox basin*
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 ([ ]).