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Kallakurichi Formation

The Kallakurichi Formation, alternatively spelled as Kallankurichchi or Kallankurichi Formation,[1] is a geological formation of the Ariyalur Group in Tamil Nadu, southern India whose strata date back to the Maastrichtian stage of the Late Cretaceous. Dinosaur eggs of Megaloolithus cylindricus are among the fossils that have been recovered from the sandy limestones of the formation.[2]

Kallakurichi Formation
Stratigraphic range: Maastrichtian
~72–69 Ma
↓
TypeGeological formation
Unit ofAriyalur Group
UnderliesOttakovil formation
OverliesSillakkudi formation
Lithology
PrimaryLimestone
Location
Coordinates11°06′N 79°06′E / 11.1°N 79.1°E / 11.1; 79.1
Approximate paleocoordinates35°18′S 56°24′E / 35.3°S 56.4°E / -35.3; 56.4
RegionTamil Nadu
Country India
Type section
Named forKallakurichi
Kallakurichi Formation is located in India
Kallakurichi Formation
Kallakurichi Formation (India)
Kallakurichi Formation is located in Tamil Nadu
Kallakurichi Formation
Kallakurichi Formation (Tamil Nadu)

Fossil content

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The following fossils were reported from the formation:[1]

Color key
Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon
Notes
Uncertain or tentative taxa are in small text; crossed out taxa are discredited.

Dinosaurs

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Ornithischian
Ornithischians from the Kallakurichi Formation
Genus Species Material Notes
Stegosauridae[3] indet A Stegosaurid.
Sauropods
Sauropods from the Kallakurichi Formation
Genus Species Material Notes
?Titanosaurus[3] T. indicus A titanosaurian sauropod.
Megaloolithus[4] M. cylindricus Fossilised Eggs A Sauropod Oogenus.
Theropods
Theropods from the Kallakurichi Formation
Genus Species Material Notes
Theropoda[3] indet A Theropod.

Molluscas

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Molluscas from the Kallakurichi Formation
Genus Species Material Notes
Inoceramus[5] I. bulbus A Clam.
I. tamulicus
Pycnodonta[5] P. vesicularis A Clam.
Ostrea (Alectryonia)[5] sp. A Clam.
Anisomyon[5] A. indicus A snail.
Brachiopods from the Kallakurichi formation
Genus Species Material Notes Member
Gyrodina G. globosa[5]
Neobulimina N. sp.[5]
Foraminiferans from the Kallakurichi formation
Genus Species Material Notes Member
Textulariina T. nacataensis[5]
Rhynchonellatans from the Kallakurichi formation
Genus Species Material Notes Member
Rectithyris R. subdepressa[5]
Rhynchonella R. sp.[5]
Sea Urchins from the Kallakurichi formation
Genus Species Material Notes Member
Hemipneustes H. compressus[6]

See also

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References

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  1. ^ a b Kallankurichchi Formation at Fossilworks.org
  2. ^ Weishampel et al., 2004, pp.593-600
  3. ^ a b c Weishampel, et al. (2004). "The Dinosauria. Second Edition." Pp 680.
  4. ^ Kohring et al., 1996
  5. ^ a b c d e f g h i Ayyasami, 1989
  6. ^ Aziz & Badve, 1990

Bibliography

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  • 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 21 February 2019
  • Kohring, R.; Bandel, K.; Kortum, D.; Parthasararthy, S. (1996), "Shell structure of a dinosaur egg from the Maastrichtian of Ariyalur (southern India)", Neues Jahrbuch für Geologie und Paläontologie - Monatshefte, 1996: 48–64, doi:10.1127/njgpm/1996/1996/48
  • Aziz, S.A.; Badve, R. M. (1990), "Occurrence of Hemipneustes Agassiz (Echinoid) from Tiruchirapalli Cretaceous, Tamil Nadu, India", Journal of the Geological Society of India, 36: 326–330
  • Ayyasami, K (1989), "Genus Anisomyon (Gastropoda) from the Cretaceous of Southern India", Journal of the Geological Society of India, 33: 361–364
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