| Intertrappean Beds | |
|---|---|
| Stratigraphic range: Maastrichtian-Danian, | |
| Type | Geological formation |
| Unit of | Deccan Traps |
| Overlies | Infratrappean Beds |
| Location | |
| Coordinates | 17°12′N 77°54′E / 17.2°N 77.9°E |
| Approximate paleocoordinates | 28°00′S 59°00′E / 28.0°S 59.0°E |
| Region | Madhya Pradesh, Maharashtra, Telangana, Gujarat, Uttar Pradesh, Andhra Pradesh, Karnataka[1] |
| Country | India |
The Intertrappean Beds are a Late Cretaceous and Early Paleocene geologic formation in India. The beds are found as interbeds between Deccan Traps layers, including the slightly older Lameta Formation. The formation spans the Cretaceous–Paleogene boundary, with a stratigraphic range of only a few hundred thousand years before and after the boundary, and a significant debate exists about whether specific sites belong to the Cretaceous or the Paleocene.[2][1]
Many mostly fragmentary fossils, especially of small vertebrates, are known from the formation.[3] Indeterminate theropod and pterosaur remains have been recovered from the formation, as well as dinosaur eggs.[4][5] The mammal genera Deccanolestes, Sahnitherium, Bharattherium, Indoclemensia, Indotriconodon and Kharmerungulatum have been recovered from several localities.[6] The Bamanbor locality in Gujarat preserves articulated freshwater fish specimens.[7][8] A rich plant flora is known from the formation.
- ^ a b Wilson Mantilla, Gregory P.; Renne, Paul R.; Samant, Bandana; Mohabey, Dhananjay M.; Dhobale, Anup; Tholt, Andrew J.; Tobin, Thomas S.; Widdowson, Mike; Anantharaman, S.; Dassarma, Dilip Chandra; Wilson Mantilla, Jeffrey A. (2022-04-01). "New mammals from the Naskal intertrappean site and the age of India's earliest eutherians". Palaeogeography, Palaeoclimatology, Palaeoecology. 591: 110857. Bibcode:2022PPP...59110857W. doi:10.1016/j.palaeo.2022.110857. ISSN 0031-0182.
- ^ Khosla, Ashu; Verma, Omkar; Kania, Sachin; Lucas, Spencer (2023). "Microbiota from the Late Cretaceous-Early Palaeocene Boundary Transition in the Deccan Intertrappean Beds of Central India". Topics in Geobiology. 54. doi:10.1007/978-3-031-28855-5. ISBN 978-3-031-28854-8. ISSN 0275-0120.
- ^ Prasad, Guntupalli V.R.; Sahni, Ashok (2014), "Vertebrate fauna from the Deccan volcanic province: Response to volcanic activity", Volcanism, Impacts, and Mass Extinctions: Causes and Effects, Geological Society of America, doi:10.1130/2014.2505(09), ISBN 978-0-8137-2505-5, retrieved 2024-04-03
- ^ Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
- ^ Barrett, P.M., Butler, R.J., Edwards, N.P., & Milner, A.R. Pterosaur distribution in time and space: an atlas. p61-107. in Flugsaurier: Pterosaur papers in honour of Peter Wellnhofer. 2008. Hone, D.W.E., and Buffetaut, E. (eds). Zitteliana B, 28. 264pp.[1]
- ^ "MESOZOIC MAMMALS; Basal Eutheria Two, an internet directory". Archived from the original on 2011-06-07. Retrieved 2008-05-04.
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