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National Geologic Map Database

Geologic Unit: Denison

Usage:

No current usage.
(†Denison Formation of Washita Group (OK*,TX*) abandoned. Members raised to formation rank. See Denton, Grayson, Main Street, Pawpaw, and Weno.)


Geologic age:

late Early to early Late Cretaceous (Albian to Cenomanian; Comanchean Provincial Epoch)*


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

Named from exposures at Denison, Grayson Co., northeastern TX (US geologic names lexicons, USGS Bull. 896, 1200).


AAPG geologic province:

South Oklahoma folded belt*


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 ([ ]).