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Aïn el Guettar Formation

Coordinates: 33°12′N 10°18′E / 33.2°N 10.3°E / 33.2; 10.3
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Ain el Guttar Formation
Stratigraphic range: Late Aptian-Early Albian
~115–109 Ma
TypeFormation
Unit ofAïn el Guettar Formation
UnderliesZebbag Formation
OverliesDouiret Formation
Lithology
PrimarySandstone
OtherConglomerate, mudstone
Location
LocationSahara Desert
Coordinates33°12′N 10°18′E / 33.2°N 10.3°E / 33.2; 10.3
Approximate paleocoordinates15°54′N 10°18′E / 15.9°N 10.3°E / 15.9; 10.3
RegionTataouine
Country Tunisia
Type section
Named forChenini
Aïn el Guettar Formation is located in Tunisia
Aïn el Guettar Formation
Aïn el Guettar Formation (Tunisia)

The Ain el Guettar Formation is a geological formation in Tunisia, whose strata date back to the Late Aptian to Early Albian stages of the Cretaceous period.[1][2] The lithology consists of coarse sandstones with occasional conglomerates and mudstones.[3] Dinosaur remains are among the fossils that have been recovered from the formation.[4]

Stratigraphy

The Ain el Guettar is divided into at least 3 members, which represent different depositional environments. In ascending order these are: the Chenini Member, the Oum ed Diab Member and the Jebel El Mra Member.

Stratigraphy of the Ain el Guttar Formation
Formation Time period Member Lithology Thickness Image
Zebbag Turonian
Cenomanian
Ain el Guttar Albian Jebel El Mra Coarse sandstones with occasional conglomerates and mudstones.
Albian

Aptian

Oum ed Diab Coarse sandstones with occasional conglomerates and mudstones.
Chenini Member Coarse sandstones with occasional conglomerates and mudstones.
Douiret Hauterivian

Aptian

80 metres (260 ft)
Basement Serpukhovian

Cenomanian

Continental Intercalaire varying thickness


Vertebrate paleofauna

File:Scotese 105 ma.png
late Early Cretaceous (105 Ma)

The Ain el Guettar Formation during the Early Cretaceous period was a marsh-like habitat with swamps and plenty of water. The most famous dinosaur discoveries made here include Carcharodontosaurus and Spinosaurus.

See also

References

  1. ^ Bateun el Hmaima at Fossilworks.org
  2. ^ Bir Miteur, RH 45 at Fossilworks.org
  3. ^ Benton, Michael J.; Bouaziz, Samir; Buffetaut, Eric; Martill, David; Ouaja, Mohamed; Soussi, Mohamed; Trueman, Clive (April 2000). "Dinosaurs and other fossil vertebrates from fluvial deposits in the Lower Cretaceous of southern Tunisia". Palaeogeography, Palaeoclimatology, Palaeoecology. 157 (3–4): 227–246. Bibcode:2000PPP...157..227B. doi:10.1016/s0031-0182(99)00167-4. ISSN 0031-0182.
  4. ^ a b c d e 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.
  5. ^ Buffetaut, E & Ouaja, M (2002) A new specimen of Spinosaurus (Dinosauria, Theropoda) from the Lower Cretaceous of Tunisia, with remarks on the evolutionary history of the Spinosauridae. Bulletin de la Société Géologique de France 173: 415–421. doi:10.2113/173.5.415
  6. ^ a b Federico Fanti; Andrea Cau; Mohsen Hassine; Michela Contessi (2013). "A new sauropod dinosaur from the Early Cretaceous of Tunisia with extreme avian-like pneumatization". Nature Communications. 4 (2080): 1–7. Bibcode:2013NatCo...4.2080F. doi:10.1038/ncomms3080. PMID 23836048. {{cite journal}}: Unknown parameter |last-author-amp= ignored (|name-list-style= suggested) (help)
  7. ^ G. Cuny, A. M. Cobbett, F. J. Meunier and M. J. Benton. 2010. Vertebrate microremains from the Early Cretaceous of southern Tunisia. Geobios 43:615-628
  8. ^ BENTON, M. J., BOUAZIZ, S., BUFFETAUT, E., MARTILL, D. M., OUAJA, M., SOUSSI, M. & TRUEMAN, C. (2000): Dinosaurs and other fossil vertebrates from fluvial deposits in the Lower Cretaceous of southern Tunisia. Palaeogeography, Palaeoclimatology, Palaeoecology, 157: 227–246.

Further reading

  • S. Bouaziz, É. Buffetaut, M. Ghanmi, J.-J. Jaeger, M. Martin, J.-M. Mazin, and H. Tong. 1988. Nouvelles découvertes de vertébrés fossiles dans l'Albien du sud tunisien [New discoveries of fossil vertebrates in the Albian of southern Tunisia]. Bulletin de la Société Géologique de France, 8e série 4(2):335-339
  • J. Le Loeuff, É. Buffetaut, G. Cuny, Y. Laurent, M. Ouaja, C. Souillat, D. Srarfi and H. Tong. 2000. Mesozoic continental vertebrates of Tunisia. 5th European Workshop on Vertebrate Palaeontology, Staatliches Museum für Naturkunde, Geowissenschaften Abteilung. Program. Abstracts. Excursion Guides 45

Category:Geologic formations of Tunisia Category:Lower Cretaceous Series of Africa Category:Albian Stage Category:Aptian Stage Category:Sandstone formations Category:Fluvial deposits Category:Paludal deposits Category:Paleontology in Tunisia Category:Tataouine Governorate




References

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