Javelina Formation

Javelina Formation
Javelina Formation
Stratigraphic range: Maastrichtian,
	Distinctive mauve and red beds of the Javelina Formation outcropping in Big Bend National Park, Texas
Type	Geological formation
Unit of	Tornillo Group
Underlies	Black Peaks Formation
Overlies	Aguja Formation
Lithology
Primary	Sandstone
Other	Claystone, mudstone, siltstone, conglomerate
Location
Coordinates	29°18′N 103°24′W / 29.3°N 103.4°W
Approximate paleocoordinates	36°00′N 82°48′W / 36.0°N 82.8°W
Region	Texas
Country	USA
Type section
Named for	Javelina
	Javelina Formation (the United States) Javelina Formation (Texas)

The Javelina Formation is a geological formation in Texas. Dating has shown that the strata date to the Maastrichtian stage of the Late Cretaceous, approximately 70 to 66.5 million years old.^[1] The middle part of the formation has been dated to about 69 million years ago plus or minus 1 million years and the top situated near the Cretaceous–Paleogene boundary (in the overlying Black Peaks Formation^[1]), dated to 66 Ma ago.^[2] Dinosaur remains are among the fossils that have been recovered from the formation.^[3]

^ ^a ^b Woodward, H. N. (2005). Bone histology of the sauropod dinosaur Alamosaurus sanjuanensis from the Javelina Formation, Big Bend National Park, Texas.
^ Lehman, T.M.; McDowell, F.; Connelly, J. (2006). "First isotopic (U-Pb) age for the Late Cretaceous Alamosaurus vertebrate fauna of West Texas, and its significance as a link between two faunal provinces". Journal of Vertebrate Paleontology. 26 (4): 922–928. doi:10.1671/0272-4634(2006)26[922:fiuaft]2.0.co;2. S2CID 130280606.
^ Weishampel, David B; et al. (2004). "Dinosaur distribution (Late Cretaceous, North America)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 574-588. ISBN 0-520-24209-2.

[woodward2005-1] Woodward, H. N. (2005). Bone histology of the sauropod dinosaur Alamosaurus sanjuanensis from the Javelina Formation, Big Bend National Park, Texas.

[lehman2006-2] Lehman, T.M.; McDowell, F.; Connelly, J. (2006). "First isotopic (U-Pb) age for the Late Cretaceous Alamosaurus vertebrate fauna of West Texas, and its significance as a link between two faunal provinces". Journal of Vertebrate Paleontology. 26 (4): 922–928. doi:10.1671/0272-4634(2006)26[922:fiuaft]2.0.co;2. S2CID 130280606.

[cretaceousdistribution-3] Weishampel, David B; et al. (2004). "Dinosaur distribution (Late Cretaceous, North America)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 574-588. ISBN 0-520-24209-2.

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