Lameta Formation

The Lameta Formation, also known as the Intertrappean Beds is a sedimentary rock formation found in Madhya Pradesh, Gujarat, and Maharashtra, India. It is of Maastrichtian age (Late Cretaceous), and is notable for its dinosaur fossils. Many dubious names have been created for isolated bones, but several genera of dinosaurs from these rocks are well-supported, including the titanosaur sauropod Isisaurus and the abelisaurs Indosaurus, Indosuchus, Laevisuchus, and Rajasaurus.[1] As well as mammals, snakes and other fossils.

Lameta Formation Stratigraphic range: Maastrichtian ~66 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Type	Geological formation
Underlies	Deccan Traps deposits
Overlies	Precambrian Basement
Area	5,000 km^2 (1,900 sq mi)
Thickness	Variable, typically 18–45 m (59–148 ft)
Lithology
Primary	Claystone, sandstone limestone
Other	Conglomerate
Location
Coordinates	23.2°N 80.0°E / 23.2; 80.0
Approximate paleocoordinates	24.7°S 63.2°E / -24.7; 63.2
Region	Western India
Country	India
Extent	Madhya Pradesh, Gujarat, Maharashtra
Lameta Formation (India)

Dinosaurs

Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Indosaurus	I. matleyi			Partial skeleton, including a partial skull.[2]
Brachypodosaurus	B. gravis			"Humerus."[3]
Coeluroides	C. largus			"Isolated vertebrae."[4]
Dryptosauroides	D. grandis			"Vertebrae."[4]
Indosuchus	I. raptorius			Cranial remains, including two braincases, as well as a nearly complete skeleton.[2]
Isisaurus	I. colberti
Jainosaurus	J. septentrionalis			"Basicranium and partial postcranial skeleton."[5]
Jubbulpuria	J. tenuis			"Vertebrae."[4]
Lametasaurus	L. indicus			"Sacrum, ilia, tibia."[4] "Sacrum, ilia, tibia, spines, armor."[6]
Laevisuchus	L. indicus			Only vertebrae.[2]
Ornithomimoides	O. barasimlensis			"Vertebrae."[4]
	O. mobilis			"Vertebrae"[4]
Orthogoniosaurus	O. matleyi			"Tooth"[4]
Rahiolisaurus	R. gujaratensis
Rajasaurus	R. narmadensis
Titanosaurus	T. blanfordi			"Caudal vertebrae."[7]
	T. rahioliensis			"Teeth"[8]

Snakes

Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Sanajeh	S. indicus			A skull, precloaca vertebrae and ribs.	A madtsoiid snake	Sanajeh about to attack a titanosaur hatchling
Indophis	I. sahnii	Naskal microvertebrate site		Vertebrae

Mammals

Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Bharattherium	B. bonapartei	Kisalpuri
Deccanolestes	D. hislopi	Naskal microvertebrate site		Molars, calcanea, astralgi, humerus, ulna
	D. robustus	Naskal microvertebrate site		"Dental material and an astragalus"
	D. narmadensis	Kisalpuri
Kharmerungulatum	K. vanvaleni	Kisalpuri
Dakshina	D. jederi	Naskal microvertebrate site		Teeth	Sudamericid
Sahnitherium	S. rangapurensis	Rangapur microvertebrate site		Upper Molar

Turtles

Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Jainemys	J. pisdurensis				A bothremydid soft shelled turtle

See also

• List of dinosaur-bearing rock formations
• Geology of India
• Deccan Traps
• Maevarano Formation, contemporaneous fossiliferous formation of Madagascar

References

1. Weishampel et al., 2004, pp.517-606
2. "Table 3.1," in Weishampel, et al. (2004). Page 49.
3. "Table 17.1," in Weishampel, et al. (2004). Page 367.
4. "Table 3.1," in Weishampel, et al. (2004). Page 50.
5. "Table 13.1," in Weishampel, et al. (2004). Page 269.
6. "Table 17.1," in Weishampel, et al. (2004). Page 368.
7. "Table 13.1," in Weishampel, et al. (2004). Page 270.
8. "Table 13.1," in Weishampel, et al. (2004). Page 271.

Bibliography

• Weishampel, David B.; Peter Dodson, and Halszka Osmólska (eds.). 2004. The Dinosauria, 2nd edition, 1–880. Berkeley: University of California Press. Accessed 2019-02-21. ISBN 0-520-24209-2