Kallamedu Formation
The Kallamedu Formation is a Late Cretaceous (Maastrichtian) geologic formation located in India that forms part of the Ariyalur Group.[1] Dinosaur remains and petrified wood samples are among the known fossils recovered from this formation.[2]
| Kallamedu Formation Stratigraphic range: Maastrichtian ~70.6–65.5 Ma | |
|---|---|
| Type | Geological formation |
| Underlies | Niniyur Formation |
| Overlies | Archean Basement |
| Thickness | Variable, typically 5–5,000 km (3.1–3,106.9 mi) |
| Lithology | |
| Primary | Claystone, siltstone limestone |
| Other | Conglomerate |
| Location | |
| Coordinates | 11.6962°N 79.4127°E |
| Country |  India |
| Extent | Kallamedu |
| Type section | |
| Named for | Kallamedu village |
Paleofauna
- Abelisauridae indet. – "disassociated remains."[3]
- Bruhathkayosaurus matleyi – "ilium and ischium, femur, tibia, radius and part of a vertebra (specifically a platycoelous caudal centrum). Remains no longer exist."[4]
- Carnosauria indet.? – "fragmentary remains."[4]
- Crocodilia indet. – "teeth."[5]
- Fusioolithus baghensis – "eggs."[6]
- Kurmademys kallamedensis – "nearly complete skull."[7]
- Notosuchia indet. - "related to Simosuchus."[5]
- Sauropoda indet. – "fragmentary remains."[8]
- Stegosauria indet. – "dermal plate or misinterpreted sauropod bone."[9]
- Titanosauria indet. - "solitary egg."[6]
- Troodontidae indet. – "One isolated tooth (DUGF/52)."[3]
References
- Memoirs of the Geological Survey of India. Oxford University. 1865. pp. 107–140.
- Weishampel, David B; et al. (2004). "Dinosaur distribution (Late Cretaceous, Asia)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 593–600. ISBN 0-520-24209-2.
- Goswami, A.; Prasad, G. V. R.; Verma, O.; Flynn, J. J.; Benson, R. B. J. (2013). "A troodontid dinosaur from the latest Cretaceous of India". Nature Communications. 4: 1703. Bibcode:2013NatCo...4.1703G. doi:10.1038/ncomms2716. PMID 23591870.
- Yadagiri, P. and Ayyasami, K. (1987). "A carnosaurian dinosaur from the Kallamedu Formation (Maestrichtian horizon), Tamilnadu." In M.V.A. Sastry, V.V. Sastry, C.G.K. Ramanujam, H.M. Kapoor, B.R. Jagannatha Rao, P.P. Satsangi, and U.B. Mathur (eds.), Three Decades of Development in Palaeontology and Stratigraphy in India. Volume 1. Precambrian to Mesozoic. Geological Society of India Special Publication, 11(1): 523–528.
- Prasad, G. V. R., Verma, O., Flynn, J. J. & Goswami, A. (2013) A new Late Cretaceous vertebrate fauna from the Cauvery basin, South India: implications for Gondwanan palaeobiogeography. Journal of Vertebrate Paleontology.
- Dhiman, Harsha; Prasad, Guntupalli V. R.; Goswami, Anjali (2018). "Parataxonomy and palaeobiogeographic significance of dinosaur eggshell fragments from the Upper Cretaceous strata of the Cauvery Basin, South India". Historical Biology: 1–13. doi:10.1080/08912963.2018.1450408. S2CID 89969203.
- Gaffney, Eugene S; Chatterjee, Sankar; Rudra, Dhiraj K. (2001). "Kurmademys, a new side-necked turtle (Pelomedusoides: Bothremydidae) from the Late Cretaceous of India" (pdf). American Museum Novitates. 3321: 1–16. doi:10.1206/0003-0082(2001)321<0001:kansnt>2.0.co;2. hdl:2246/2938.
- R. Lydekker. 1877. Notices of new and other Vertebrata from Indian Tertiary and Secondary rocks. Records of the Geological Survey of India 10(1):30–43
- Peter M. Galton; Krishnan Ayyasami (2017). "Purported latest bone of a plated dinosaur (Ornithischia: Stegosauria), a "dermal plate" from the Maastrichtian (Upper Cretaceous) of southern India". Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen. 285 (1): 91–96. doi:10.1127/njgpa/2017/0671.
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