Imi-n-Ifri Formation

Imi-n-Ifri Formation
Stratigraphic range: Sinemurian
Type	Geological formation
Underlies	Aganane Formation
Lithology
Primary	Limestone, dolomite
Location
Coordinates	31.3°N 7.1°W / 31.3; -7.1
Approximate paleocoordinates	24.6°N 6.8°W / 24.6; -6.8
Region	Africa
Country	Morocco
Extent	Ouarzazate Province
Imi-n-Ifri Formation (Morocco)

The Imi-n-Ifri Formation is a Sinemurian geologic formation outcropping about 6 kilometres (3.7 mi) from Demnate, to the east of Marrakech, Morocco. Fossil ornithopod tracks have been reported from the formation.^[1]

Description

The formation comprises limestones and dolomites deposited in shallow depth of water, low-energy, marine or lagoonal to supratidal environments. The footprints appear on the surface of a vast limestone on a surface of between 8 and 9,000 square metres (86 and 96,875 sq ft). The top of the carbonate sequence is marked by a bench of yellow 'cargneule' capped by a hardground.^[2]

See also

• List of dinosaur-bearing rock formations
  • List of stratigraphic units with ornithischian tracks
    • Ornithopod tracks

References

1. Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
2. Adrar-n-Ouglagal tracksite at Fossilworks.org

Bibliography

• Weishampel, David B.; Dodson, Peter; Osmólska, Halszka (2004), The Dinosauria, 2nd edition, Berkeley: University of California Press, pp. 1–880, ISBN 0-520-24209-2, retrieved 2019-02-21

Further reading

• M. Monbaron, J. Dejax, and G. Demathieu. 1985. Longues pistes de Dinosaures bipèdes à Adrar-n-Ouglagal (Maroc) et répartition des faunes de grands Reptiles dans le domaine atlasique au cours du Mésozoïque. Bulletin du Muséum National D'Histoire Naturelle, 4e série, section A 7(3):229-242