Khadir Formation
| Khadir Formation | |
|---|---|
| Stratigraphic range: Middle to Late Jurassic ~ | |
| Type | Geological formation |
| Sub-units | Hadibhadang Member and Dingy Hill Member |
| Thickness | 550–600 m (1,800–1,970 ft) |
| Location | |
| Coordinates | 23°54′N 70°18′E / 23.9°N 70.3°E |
| Approximate paleocoordinates | 22°48′S 33°42′E / 22.8°S 33.7°E |
| Region | Gujrat |
| Country |  India |
| Extent | Katch Basin |
| Type section | |
| Named for | Khadir Island |
  Khadir Formation (India) | |
The Khadir Formation is a geological formation in India. It is of Middle Jurassic age. Dinosaur bones are among the fossils recovered from the formation.
Lithology
[edit]The Khadir Formation is composed of in variegated to dark red argillaceous silt, where in ceratain horizions the silt are full of diagenetically formed gypsum. Occasionally, the silt is interrupted thin intercalations of fine to medium-grained crossbedded sandstone. The silt overlies whitish, medium-grained sandstone with large trough-crossbeds. Towards the north of Khadir Island a nine meter thick, friable, coarse-grained sandstone occurs, with large trough-crossbedding that cements towards the top and forms a small cliff. The depositional environment appears to have been a floodplain with fluvial channels bue to the variegated and red colours, fossil wood and the sharp erosional base of the sandstones.[1]
Paleobiota
[edit]Color key
|
Notes Uncertain or tentative taxa are in small text; |
Dinosaurs
[edit]| Dinosaurs from the Karai Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Sauropoda[1] | Indeterminate. | Southern margin of Cheriya Bet | Lower | Rib, vertebral fragments and a part of a long bone. | ||
| Camarasauromorpha[1] | Indeterminate. | Southern margin of Cheriya Bet | Lower | Distal end of a right metacarpal. nearly complete right pedal claw. part of a left fibula. | Possibly represents the oldest known camarasauromorph. May not belong to the same taxon. | |
References
[edit]- ^ a b c Moser, Markus; Mathur, Umesh B.; Fürsich, Franz T.; Pandey, Dhirendra K.; Mathur, Neera (2006-03-01). "Oldest camarasauromorph sauropod (Dinosauria) discovered in the Middle Jurassic (Bajocian) of the Khadir Island, Kachchh, western India". Paläontologische Zeitschrift. 80 (1): 34–51. doi:10.1007/BF02988396. ISSN 0031-0220.