The Trichinopoly Group is a geological formation in India whose strata date back to the Late Cretaceous. It lies between the Ootatoor and Ariyalur Groups. It is broad in its southern extremity but thins as it gradually proceeds northwards as it ultimately meets the Ariyalur Group.[1] Dinosaur remains are among the fossils that have been recovered from the formation.[2]
| Trichinopoly Group | |
|---|---|
| Stratigraphic range: Turonian-Santonian ~ | |
| Type | Geological formation |
| Underlies | Ariyalur Group |
| Overlies | Ootatoor Group |
| Lithology | |
| Primary | Sandstone |
| Location | |
| Coordinates | 11°06′N 78°54′E / 11.1°N 78.9°E |
| Approximate paleocoordinates | 44°48′S 45°48′E / 44.8°S 45.8°E |
| Region | Tamil Nadu and Kerala |
| Country |  India |
  Trichinopoly Group (India) | |
Paleobiota
editColor key
|
Notes Uncertain or tentative taxa are in small text; |
Dinosaurs
edit- Ornithischians
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
|---|---|---|---|---|---|---|
| Dravidosaurus[3] | D. blanfordi | Ariyalur | Fragmentary Skull, tooth, sacrum, ilium, ischium, armor plate and dermal spine of an adult. | A (Possible) Stegosaur. | ||
| ?Iguanodon[4] | sp. | Ootatoor | "Unidentified remains of a Gigantic Saurian presumed to be an Ornithopod" | A fragmentary Ornithopod described as an Iguanodon. |
See also
editReferences
edit- ^ 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.
- ^ "Table 16.1," in Weishampel, et al. (2004). Page 344.
- ^ Blanford, W.T. (1862). "On the Cretaceous and other rocks of the South Arcit, and Trichinopoly districts, Madras". Memoirs of the Geological Survey of India. 4 (1): 1–217.
Bibliography
edit- Weishampel, David B.; Dodson, Peter; Osmólska, Halszka, eds. (2004). The Dinosauria (2nd ed.). Berkeley: University of California Press. pp. 1–880. ISBN 0-520-24209-2. Retrieved 21 February 2019.