Antlers Formation

The Antlers Formation occurs as a band of strata from Arkansas through southern Oklahoma into northeastern Texas. It consists of 150 m of silty to sandy mudstones, fine- to coarse grained sandstones that are poorly to moderately sorted and cemented with clay or calcium carbonate. In places the sandstone may be conglomeratic or ferruginous.

Based on correlation with the Trinity Group of Texas, the Antlers Formation is estimated to be late Aptian-early Albian. This age range is supported by the presence of two dinosaurs that are also known from the Cloverly Formation, "Deinonychus" and "Tenontosaurus".

Vertebrate fauna

References: Cifelli et al. 1999; Wedel et al. 2000, Kielan-Jarorowska and Cifelli 2001; Nydam and Cifelli 2002.

Cartilaginous fish

Reptiles

Ornithischia

Mammals

ee also

* List of dinosaur-bearing rock formations

References

*Cifelli, R. Gardner, J.D., Nydam, R.L., and Brinkman, D.L. 1999. Additions to the vertebrate fauna of the Antlers Formation (Lower Cretaceous), southeastern Oklahoma. Oklahoma Geology Notes 57:124-131.
*Nydam, R.L. and R. L. Cifelli. 2002a. Lizards from the Lower Cretaceous(Aptian-Albian) Antlers and Cloverly formations. Journal of VertebratePaleontology. 22:286–298.
*Kielan-Jarorowska, Z., and Cifelli, R.L. 2001. Primitive boreosphenidan mammal (?Deltatheroida) from the Early Cretaceous of Oklahoma. Acta Palaeontologica Polonica 46: 377-391.
*Wedel, M.J., Cifelli, R.L., and Sanders, R. K. 2000. "Sauroposeidon Proteles", A new sauropod from the Early Cretaceous of Oklahoma. Journal of Vertebrate Paleontology 20:109-114.