Lance's north Texas fossil page - Eagle Ford formation

breaks the shale sequence 75 feet below the top of the Eagle Ford at Arcadia Park. These beds, well exposed in cuts along the Dallas-Fort Worth highway at the western edge of the town, have a thickness of one foot. They consist of gray to brownish, brown-weathering limestone containing considerable clay, silt and fine sand, and bedded in units from a fraction of an inch to three inches thick. On the rough and, irregular surfaces of bedding are numerous fossils including small ammonites, pelecypods, fish teeth [Ptychodus], and worm (?) castings. Other portions of the rock are made of calcareous shell fragments. The fossils are not uniformly distributed through the flags, however, and some layers appear to be barren, as Scott (1940, p. 312-313) has observed."

" Flaggy material of the same character as that described above is exposed along the west side of Ledbetter Road about one mile south of Arcadia Park. The main flaggy layer is slightly over one foot thick, but for six inches above the top there are alternating layers of clay and impure lime-stone, the latter in units averaging a quarter of an inch thick. Other exposures of the flaggy layers may be seen along Mountain Lake pike near its intersection with Blue Cut road. Between the flaggy layers and the top of the formation is a thickness of 75 feet, mostly dark gray to black shale. These upper beds are well exposed in the railroad cut directly south of the Dallas-Fort Worth highway between Arcadia Park and Chalk Hill, in the embankments along the same highway at Chalk Hill, and in the quarry of the Trinity Portland Cement Co. "

Strata diagram (upper 130 feet)
Eagle Ford Fossil Zones (entire formation)

Pics:

Geology:
Hunting for shark teeth. Tarrant co., Tx.
Cephalopods: (ammonites, baculites)
Placenticeras ammonite ? Form: Eagle Ford, Britton shale Period: Cretaceous (c. 95 mya) Loc: Denton co., Tx. 2007.	unknown ammonite Form: Eagle Ford, Britton shale Period: Cretaceous (c. 95 mya) Loc: Denton co., Tx ?	Placenticeras ammonite ? Form: Eagle Ford, upper member Period: Cretaceous (c. 95 mya) Loc: Dallas co., Tx
Prionocyclus? ammonites Form: Eagle Ford (upper shale) Period: Cretaceous (c. 95 mya) Loc: Grayson co., Tx. March 22, 2009.	Prionocyclus? ammonites Form: Eagle Ford (upper shale) Period: Cretaceous (c. 95 mya) Loc: Grayson co., Tx. March 22, 2009.	Metoicoceras ammonites Form: Eagle Ford, upper member Period: Cretaceous (c. 95 mya) Loc: Dallas co., Tx. Feb. 24, 2007.
baculites Form: Eagle Ford, Britton shale Period: Cretaceous (c. 95 mya) Loc: Denton co., Tx.
Vertebrates (shark):
Cretoxyrhina shark teeth Period: Cretaceous (c. 95 mya) Loc: Tarrant co., Tx.	Cretoxyrhina shark teeth Period: Cretaceous (c. 95 mya) Loc: Tarrant co., Tx.	Squalicorax shark teeth Period: Cretaceous (c. 95 mya) Loc: Tarrant co., Tx.
Ptychodus shark teeth Period: Cretaceous (c. 95 mya) Loc: Tarrant co., Tx.	Ptychodus shark teeth Period: Cretaceous (c. 95 mya) Loc: Tarrant co., Tx.	Shark teeth (various species) Period: Cretaceous (c. 95 mya) Loc: Dallas, Tx. May 2006.
Shark tooth Form: Eagle Ford, upper shale Period: Cretaceous (c. 95 mya) Loc: Tarrant co., Tx.	Shark and fish vertebrae Form: Eagle Ford, Britton shale Period: Cretaceous (c. 95 mya) Loc: Tarrant co., Tx.
Vertebrates (fish):
fish tail bones Form: Eagle Ford, Britton shale Period: Cretaceous (c. 95 mya) Loc: Tarrant co., Tx.	Pachyrhizodus fish jaw? Form: Eagle Ford, Britton shale Period: Cretaceous (c. 95 mya) Loc: Tarrant co., Tx.	fish fin Form: Eagle Ford Period: Cretaceous (c. 95 mya) Loc: Tarrant co., Tx.
Enchodus?? jaw Form: Eagle Ford, Britton shale member Period: Cretaceous (c. 95 mya) Loc: Tarrant co., Tx.	fish vertebra Form: Eagle Ford Period: Cretaceous (c. 95 mya) Loc: Tarrant co., Tx. 2007.
Vertebrates (reptiles, pterosaurs):
turtle limb bone Form: Eagle Ford, Britton shale Period: Cretaceous (c. 95 mya) Loc: Dallas co., Tx.	Coniasaurus vertebrae Form: Eagle Ford, Britton shale Period: Cretaceous (c. 95 mya) Loc: Tarrant co., Tx.	Aetodactylus halli pterosaur jaw Form: Eagle Ford, Britton shale Period: Cretaceous (c. 94 mya) Loc: Tarrant co., Tx. July 2006.
Crustaceans (crabs, lobsters):
Linuparis sp. lobster Form: Eagle Ford, Britton Period: Cretaceous Loc: Denton co., Tx. April 7, 2007.	Notopocorystes crabs: Form: Eagle Ford, Britton Period: Cretaceous Loc: Denton co., Tx. June 27, 2009.