Lameta Formation

Lameta Formation
Stratigraphic range: Maastrichtian
~66 Ma
↓
Type Geological formation
Underlies Deccan Traps deposits
Overlies Unconformity with Precambrian rocks
Area 5,000 km2 (1,900 sq mi)
Thickness Variable, typically 18–45 m (59–148 ft)
Lithology
Primary Claystone, sandstone limestone
Other Conglomerate
Location
Coordinates 23°12′N 80°00′E / 23.2°N 80.0°E / 23.2; 80.0Coordinates: 23°12′N 80°00′E / 23.2°N 80.0°E / 23.2; 80.0
Approximate paleocoordinates 24°42′S 63°12′E / 24.7°S 63.2°E / -24.7; 63.2
Region Western India
Country  India
Extent Madhya Pradesh, Gujarat, Maharashtra

The Lameta Formation is a sedimentary rock formation found in Madhya Pradesh, Gujarat, and Maharashtra, India. It is of Maastrichtian age (Upper 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]

Dinosaurs

Genus Species Location Stratigraphic position Material Notes Images

Indosaurus

I. matleyi

Partial skeleton, including a partial skull.[2]
Rajasaurus

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]

Rajasaurus

R. narmadensis

Rahiolisaurus

R. gujaratensis

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.

See also

References

  1. ↑ Weishampel, David B.; Barrett, Paul M.; Coria, Rodolfo A.; Le Loueff, Jean; Xu Xing; Zhao Xijin; Sahni, Ashok; Gomani, Elizabeth M.P.; Noto, Christopher N. (2004). "Dinosaur distribution". In Weishampel, David B.; Dodson, Peter; Osmólska Halszka. The Dinosauria (2nd ed.). Berkeley: University of California Press. pp. 517–606. ISBN 0-520-24209-2.
  2. 1 2 3 "Table 3.1," in Weishampel, et al. (2004). Page 49.
  3. ↑ "Table 17.1," in Weishampel, et al. (2004). Page 367.
  4. 1 2 3 4 5 6 7 "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.
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