Echkar Formation
Appearance
Echkar Formation | |
---|---|
Stratigraphic range: Late Albian-Cenomanian ~ | |
Type | Geological formation |
Unit of | Tegama Group |
Underlies | Farak Formation |
Overlies | Elrhaz Formation |
Lithology | |
Primary | Sandstone |
Other | Claystone |
Location | |
Coordinates | 17°54′N 5°36′E / 17.9°N 5.6°E |
Approximate paleocoordinates | 2°48′N 0°24′E / 2.8°N 0.4°E |
Region | Agadez Region |
Country | Niger |
Extent | Iullemmeden Basin |
Type section | |
Named for | Echkar, Aderbissinat |
The Echkar Formation is a geological formation comprising sandstones and claystones in the Agadez Region of Niger, central Africa.
Description
Its strata date back to the Late Albian to Late Cretaceous (Cenomanian stages, about 100-95 million years ago). Dinosaur remains are among the fossils that have been recovered from the formation.[1]
Fossil content
Sauropsids
Archosaurs | ||||
---|---|---|---|---|
Genus | Species | Material | Notes | Images |
Carcharodontosaurus[2] | C. iguidensis[3] C. saharicus[4] |
|||
Araripesuchus | A. rattoides | |||
Kaprosuchus | K. saharicus | |||
Laganosuchus | L. thaumastos | |||
Rugops | R. primus | |||
Spinosaurus | S. aegyptiacus |
- Other fossils
The formation also provided fossils of:[4]
See also
- List of dinosaur-bearing rock formations
- Lists of fossiliferous stratigraphic units in Africa
- Geology of Niger
References
- ^ Weishampel, David B; et al. (2004). "Dinosaur distribution (Early Cretaceous, Africa)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 571-573. ISBN 0-520-24209-2.
- ^ Brusatte, S. and Sereno, P.C. (2005). "A new species of Carcharodontosaurus (Dinosauria: Theropoda) from the Cenomanian of Niger and its implications for allosauroid phylogeny." Journal of Vertebrate Paleontology, 25: 40A.
- ^ Brusatte, S.L. and Sereno, P.C. (2007). "A new species of Carcharodontosaurus (dinosauria: theropoda) from the Cenomanian of Niger and a revision of the genus." Journal of Vertebrate Paleontology, 27(4)
- ^ a b In Abangarit-Tamesna at Fossilworks.org
Bibliography
Young, Mark T.; Alexander K. Hastings; Ronan Allain, and Thomas J. Smith. 2017. Revision of the enigmatic crocodyliform Elosuchus felixi de Lapparent de Broin, 2002 from the Lower–Upper Cretaceous boundary of Niger: potential evidence for an early origin of the clade Dyrosauridae. Zoological Journal of the Linnean Society 179. 377–403. .
Further reading
- A. F. d. Lapparent. 1953. Gisements de Dinosauriens dans le "Continental intercalaire" d'In Abangarit (Sahara méridional) [Dinosaur localities in the "Continental Intercalaire" of In Abangarit (southern Sahara)]. Comptes Rendus de l'Académie des Sciences à Paris 236:1905-1906
- P. C. Sereno, J. A. Wilson, and J. L. Conrad. 2004. New dinosaurs link southern landmasses in the mid-Cretaceous. Proceedings of the Royal Society of London B 271(1546):1325-1330