Kallakurichi Formation
Stratigraphic range: Maastrichtian
~72–69 Ma

PreЄ

Type| Geological formation
Unit of| Ariyalur Group
Underlies| Ottakovil formation
Overlies| Sillakkudi formation
Lithology
Primary| Limestone
Location
Coordinates|  [ ⚑ ] : 11°06′N 79°06′E﻿ / ﻿11.1°N 79.1°E﻿ / 11.1; 79.1
Paleocoordinates|  [ ⚑ ] 35°18′S 56°24′E﻿ / ﻿35.3°S 56.4°E﻿ / -35.3; 56.4
Region| Tamil Nadu
Country| India
Type section
Named for| Kallakurichi
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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]

## Contents

* 1 Fossil content
* 1.1 Dinosaurs
* 1.2 Molluscas
* 2 See also
* 3 References
* 3.1 Bibliography

## Fossil content

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

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Color key
| Taxon | Reclassified taxon | Taxon falsely reported as present | Dubious taxon or junior synonym | Ichnotaxon | Ootaxon | Morphotaxon

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| Notes
Uncertain or tentative taxa are in small text; ~~crossed out~~ taxa are discredited.

### Dinosaurs

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

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

* List of dinosaur-bearing rock formations
* List of stratigraphic units with dinosaur trace fossils
* Dinosaur eggs

## References

1. ↑ 1.0 1.1 Kallankurichchi Formation at Fossilworks.org
2. ↑ Weishampel et al., 2004, pp.593-600
3. ↑ 3.0 3.1 3.2 Weishampel, et al. (2004). "The Dinosauria. Second Edition." Pp 680.
4. ↑ Kohring et al., 1996
5. ↑ 5.0 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 Ayyasami, 1989
6. ↑ Aziz & Badve, 1990

### 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, https://books.google.com/books?id=vtZFDb_iw40C, retrieved 2019-02-21
* 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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