Echkar Formation
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 | ![]() |
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
[edit]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
[edit]Vertebrates
[edit]Archosaurs | ||||
---|---|---|---|---|
Genus | Species | Material | Notes | Images |
Aegyptosaurus | A. baharijensis | ![]() | ||
Araripesuchus | A. rattoides | ![]() | ||
Bahariasaurus | B. ingens | ![]() | ||
Carcharodontosaurus[3] | C. iguidensis[4] C. saharicus[2] | ![]() | ||
Ceratodus | C. sp. | ![]() | ||
Elaphrosaurus | E. iguidiensis (=Theropoda indet.) | Likely an indeterminate theropod. | ![]() | |
Elosuchus | E. sp. | ![]() | ||
Fortignathus | F. felixi | |||
Inosaurus | I. tedreftensis | |||
Kaprosuchus | K. saharicus | ![]() | ||
Laganosuchus | L. thaumastos | ![]() | ||
Lepidotes | L. sp. | ![]() | ||
Onchopristis | O. numida | |||
Platyspondylus | P. foureaui | |||
Rebbachisaurus | R. tamesnensis R. sp.[citation needed] | ![]() | ||
Rugops | R. primus | ![]() | ||
Spinosaurus | S. aegyptiacus | ![]() | ||
?Stegosauria indet. | No genus given. May not actually belong to Stegosauria. | |||
Testudines indet. | No genus given. |
See also
[edit]- List of dinosaur-bearing rock formations
- Lists of fossiliferous stratigraphic units in Africa
- Geology of Niger
References
[edit]- ^ 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.
- ^ a b In Abangarit-Tamesna at Fossilworks.org
- ^ 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)
Bibliography
[edit]- Young, Mark T.; Hastings, Alexander K.; Allain, Ronan; Smith, Thomas J. (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
[edit]- 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