- Usage in publication:
-
- Euless formation
- Modifications:
-
- Original reference
- Dominant lithology:
-
- Shale
- Sandstone
- AAPG geologic province:
-
- Strawn basin
Summary:
Pg. 475, 476, 477, 480. Euless formation of Woodbine group. Defined as surface unit which intervenes between basal Pine Bluff member of the Lewisville and base of the Dexter sands. Upper part of formation is gray and dark fossiliferous shales and sandstones. In subsurface, unconformably overlies South Tyler formation. Designation of base of the Euless (base of Dexter sand member), both in surface and in subsurface, is a matter of opinion; in certain areas, base of the Dexter is considered base of the Gulf Cretaceous. Age is Late Cretaceous (Gulf).
Type locality: town of Euless, Tarrant Co., northeastern TX.
Source: US geologic names lexicon (USGS Bull. 1200, p. 1294-1295).
- Usage in publication:
-
- Euless member*
- Modifications:
-
- Revised
- AAPG geologic province:
-
- Fort Worth syncline
- Strawn basin
Summary:
Pg. 10. Euless member of Woodbine formation. Rank reduced to member status and restricted to a shale unit, in part carbonaceous, with interbedded sandstone lenses, that forms upper part of the Euless as originally defined. Estimated thickness 45 or 50 feet. In Tarrant and Denton Counties, underlies Lewisville member of Woodbine. Age is Late Cretaceous (Cenomanian).
Source: US geologic names lexicon (USGS Bull. 1200, p. 1294-1295, Lewisville entry p. 2161-2162).
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 ([ ]).