Chari Formation
| Chari Formation | |
|---|---|
| Stratigraphic range: Callovian-Oxfordian ~ | |
| Type | Geological formation |
| Sub-units | Dhosa Conglomerate, Dhosa Oolite & Dhosa Sandstone Members |
| Lithology | |
| Primary | Limestone, siltstone, sandstone |
| Other | Oolite |
| Location | |
| Coordinates | 23°30′N 69°24′E / 23.5°N 69.4°E |
| Approximate paleocoordinates | 23°36′S 32°36′E / 23.6°S 32.6°E |
| Region | Gujarat |
| Country | India |
| Type section | |
| Named for | Chari, "salt affected" |
  Chari Formation (India)  Chari Formation (Gujarat) | |
The Chari Formation is a Jurassic (Callovian to Oxfordian) geologic formation in Gujarat, western India.[1] Dinosaur remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus.[2] The ammonite Reineckeia has also been found here. The skulls of two marine crocodiles have also been found and have been putatively identified as Steneosaurus.[3]
Fossil content
[edit]Color key
|
Notes Uncertain or tentative taxa are in small text; |
Dinosaurs
[edit]| Sauropods of the Chari Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Image |
| Sauropoda indet.[4] | Indeterminate | Jumara | JUM/V/1, proximal part of left tibia. | An indeterminate sauropod | ||
Thalattosuchians
[edit]| Thalattosuchians of the Chari Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Image |
| Steneosaurus?[3] | S.? sp. | Dhosa Oolith | Two skulls, one of those skull is said to be 1602 mm in overall length. | A large teleosaurid thalattosuchian | ||
Mollusks
[edit]Ammonites
[edit]| Ammonites of the Chari Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Image |
| Choffatia[4] | C. pardagatus | Jumara | A perisphincitid ammonite | |||
| C. cobra | ||||||
| Indosphinctes[4] | I. indica | Jumara | A perisphincitid ammonite | |||
| Phlycticeras[4] | P. sp. | Jumara | A strigoceratid ammonite | |||
| Reineckeia[4] | R. anceps | Jumara | A reineckeiid ammonite | |||
Echinoderms
[edit]| Echinoderms of the Chari Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Image |
| Alternacantha[5] | A. schwermannorum | Jumara | A ophiacanthid brittle star | |||
| Hanshessia[5] | H. trochitophila | Jumara | A ophiacanthid brittle star | |||
| Ishidacantha[6] | I. fuersichi | Jumara | A ophiacanthid brittle star | |||
| Lapidaster[6] | L. etteri | Jumara | A ophiacanthid brittle star | |||
| Ophiogaleus[6] | O. dorecki | Jumara | A Ophiacanthid brittle star | |||
See also
[edit]References
[edit]- ↑ Chari Formation at Fossilworks.org
- ↑ Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
- 1 2 Phansalkar, V. G.; Sudha, G.; A. S., Khadkikar (1994). "Giant marine reptilian skulls from the Jurassic of Kachchh, Gujarat". Current Science. 67 (6): 460–461.
- 1 2 3 4 5 Jana, Sudipta K.; Das, Shiladri (2002-01-10). "A report of a 157.8 m.y.-old dinosaur bone from the Jurassic marine Chari Formation, Kutch, Gujarat and its taphonomic significance". Current Science. 82 (1): 85–88.
- 1 2 Ben Thuy; Christian A. Meyer (2013). "The pitfalls of extrapolating modern depth ranges to fossil assemblages: new insights from Middle Jurassic brittle stars (Echinodermata: Ophiuroidea) from Switzerland". Swiss Journal of Palaeontology. 132 (1): 5–21. Bibcode:2013SwJP..132....5T. doi:10.1007/s13358-012-0048-5. S2CID 129519447.
- 1 2 3 Ben Thuy (2013). "Temporary expansion to shelf depths rather than an onshore-offshore trend: the shallow-water rise and demise of the modern deep-sea brittle star family Ophiacanthidae (Echinodermata: Ophiuroidea)". European Journal of Taxonomy (48): 1–242. doi:10.5852/ejt.2013.48.
Bibliography
[edit]- 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, retrieved 2019-02-21
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Further reading
[edit]- R. Dutta and S. Bardhan. 2016. Systematics, endemism and phylogeny of Indian proplanulitins (Ammonoidea) from the Bathonian–Callovian of Kutch, western India. Swiss Journal of Paleontology 135:23-56
- M. Alberti, D. K. Pandey, and F. T. Fürsich. 2011. Ammonites of the genus Peltoceratoides Spath, 1924 from the Oxfordian of Kachchh, western India. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen 262:1-18
- S. S. Das, S. Bardhan, and T. Kase. 2005. A new pleurotomariid gastropod assemblage from the Jurassic sequence of Kutch, western India. Paleontological Research 9(4):329-346
- F. T. Fürsich, D. K. Pandey, W. Oschmann, A.K. Jaitly, and I.B. Singh. 1994. Ecology and adaptive strategies of corals in unfavourable environments: Examples from the Middle Jurassic of the Kachchh Basin, western India. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen 194(2–3):269-303
- D. N. Ghosh. 1990. Biometry of two species of Kallirhynchia (Buckman) from Callovian beds of Kutch, India. Brachiopods Through Time 97-100