Echkar Formation

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Echkar Formation
Stratigraphic range: Late Albian-Cenomanian
~100–95 Ma
TypeGeological formation
Unit ofTegama Group
UnderliesFarak Formation
OverliesElrhaz Formation
Coordinates17°54′N 5°36′E / 17.9°N 5.6°E / 17.9; 5.6Coordinates: 17°54′N 5°36′E / 17.9°N 5.6°E / 17.9; 5.6
Approximate paleocoordinates2°48′N 0°24′E / 2.8°N 0.4°E / 2.8; 0.4
RegionAgadez Region
Country Niger
ExtentIullemmeden Basin
Type section
Named forEchkar, Aderbissinat
Echkar Formation is located in Niger
Echkar Formation
Echkar Formation (Niger)

The Echkar Formation is a geological formation comprising sandstones and claystones in the Agadez Region of Niger, central Africa.


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]


Archosaurs of the Echkar Formation
Genus Species Material Notes Images


C. iguidensis[3]
C. saharicus[4]


A. rattoides


K. saharicus


L. thaumastos


R. primus


S. sp

Other fossils

The formation also provided fossils of:[4]

See also[edit]


  1. ^ 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.
  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.
  3. ^ 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)
  4. ^ a b In Abangarit-Tamesna at


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