- Usage in publication:
-
- Fort Worth Limestone
- Modifications:
-
- Areal extent
- AAPG geologic province:
-
- Fort Worth syncline
- Ouachita folded belt
- Strawn basin
Summary:
Fort Worth Limestone. Limestone and clay. Thickness 25 to 35 feet. Lies above Duck Creek Formation and below Denton Clay. Fossiliferous. Age is Early Cretaceous.
Not separately mapped. Mapped with Denton Clay and Duck Creek Formation [in greater Fort Worth area, in Bosque, Denton, Erath, Hill, Johnson, Somervell, Tarrant, and Wise Cos., eastern TX].
Source: Publication.
- Usage in publication:
-
- Fort Worth Limestone
- Modifications:
-
- Mapped 1:250k
- Dominant lithology:
-
- Limestone
- Marl
- AAPG geologic province:
-
- Fort Worth syncline
- South Oklahoma folded belt
Summary:
Pamphlet [p. 5-6]. Fort Worth Limestone. In Texas, limestone, gray, aphanitic, beds 6 to 12 inches thick, interbedded with gray marl 2 feet or less thick, upper 8 to 10 feet mostly limestone. Thickness approximately 35 feet. Lies above Duck Creek Formation and below Denton Clay. Age is Early Cretaceous. [Mapped along Red River and southward to Lake Ray Roberts (btw. Sanger and Pilot Point); in Cooke, Denton, and Grayson Cos., northeastern TX; in northern and central part of map sheet. Fort Worth and Duck Creek mapped undifferentiated from Lake Ray Roberts area to southern edge of map sheet.]
In Oklahoma, limestone, white to gray, cream-colored in upper 7 feet, [rocks included in upper part of Caddo Formation; see entry under Caddo].
Source: Publication.
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 ([ ]).