Khadir Formation

Khadir Formation
Stratigraphic range: Middle to Late Jurassic ~170.9–154.8 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Geological formation
Sub-units	Hadibhadang Member and Dingy Hill Member
Thickness	550–600 m (1,800–1,970 ft)
Location
Coordinates	23.9°N 70.3°E / 23.9; 70.3
Approximate paleocoordinates	22.8°S 33.7°E / -22.8; 33.7
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

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

Color key Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon		Notes Uncertain or tentative taxa are in small text; crossed out taxa are discredited.

Dinosaurs

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

1. 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.