Echkar Formation

Echkar Formation
Echkar Formation
Stratigraphic range: Late Albian-Cenomanian; ~100–95 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
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
	Echkar Formation (Niger)

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

^[2]

Vertebrates

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.

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.
^ ^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

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