Kallakurichi Formation

Kallakurichi Formation
Stratigraphic range: Maastrichtian
~
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
CountryIndia
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)

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]

Fossil content

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

Ornithischian
Ornithischians from the Kallakurichi Formation
GenusSpeciesMaterialNotes
Stegosauridae[3] indet A Stegosaurid.
Sauropods
Sauropods from the Kallakurichi Formation
GenusSpeciesMaterialNotesImages
?Titanosaurus[3] T. indicus A dubious titanosaurian sauropod.
Megaloolithus[4][2] M. cylindricus Fossilised Eggs A Sauropod Oogenus.
Megaloolithus eggs from France
Theropods
Theropods from the Kallakurichi Formation
GenusSpeciesMaterialNotes
Theropoda[3] indet A Theropod.

Molluscas

Molluscas from the Kallakurichi Formation
GenusSpeciesMaterialNotes
Inoceramus[5] I. bulbus A Clam.
I. tamulicus
Pycnodonta[5] P. vesicularis
Ostrea (Alectryonia)[5] sp.
Anisomyon[5] A. indicus
Brachiopods from the Kallakurichi formation
GenusSpeciesMaterialNotesMember
Gyrodina G. globosa[5]
Isocrania[6] I. multicostata
Neobulimina N. sp.[5]
Foraminiferans from the Kallakurichi formation
GenusSpeciesMaterialNotesMember
Textulariina T. nacataensis[5]
Rhynchonellatans from the Kallakurichi formation
GenusSpeciesMaterialNotesMember
Rectithyris R. subdepressa[5]
Rhynchonella R. sp.[5]
Sea Urchins from the Kallakurichi formation
GenusSpeciesMaterialNotesMember
Hemipneustes H. compressus[7] A holasterid sea urchin

See also

References

  1. 1 2 Kallankurichchi Formation at Fossilworks.org
  2. 1 2 Weishampel et al., 2004, pp.593-600
  3. 1 2 3 Weishampel, et al. (2004). "The Dinosauria. Second Edition." Pp 680.
  4. ↑ Kohring et al., 1996
  5. 1 2 3 4 5 6 7 8 9 Ayyasami, 1989
  6. ↑ Poddar, A.; Paul, S.; Mukherjee, D.; Mukhopadhyay, A.; Chattopadhyay, D.; Das, S. (2026). "Reappraisal of the Maastrichtian brachiopods from the Kallankurichchi Formation, Cauvery Basin, India". Cretaceous Research. 184 106360. doi:10.1016/j.cretres.2026.106360.
  7. ↑ Aziz & Badve, 1990

Bibliography

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