Mahadek Formation

Mahadek Formation
Stratigraphic range: Late Cretaceous, Maastrichtian PreꞒ Ꞓ O S D C P T J K Pg N
Type	Geological formation
Underlies	N/A
Overlies	N/A
Location
Coordinates	25.3° N, 91.3° E
Region	Meghalaya
Country	India
Mahadek Formation (India)

The Mahadek Formation is a Mesozoic geologic formation in India. Dinosaur remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus. ^[1] Additionally, teeth similar to elasmobranch, as well as teeth and post cranial material of a reptile, identified as a mosasaur, are known from Krem Puri Caves rocks, which are also a part of this formation. ^{[2] [3]}

Fossil content

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

Ornithischians

Ornithischians of the Mahadek Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Image

Sauropods

Sauropods of the Mahadek Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Image
Titanosauria Indet.	Indeterminate	Meghalaya	Maastrichtian	Humerus & Teeth	A titanosaurian sauropod

Theropods

Theropods of the Mahadek Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Image

Mosasaurs

Mosasaurs of the Mahadek Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Image
Mosasauridae Indet.	Indeterminate	Meghalaya	Maastrichtian		An indeterminate mosasaurid

Fish

Fishes of the Mahadek Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Image
Elasmobranchii Indet.	Indeterminate	Meghalaya	Maastrichtian	Teeth	An shark

Mollusks

Bivalves

Bivalves of the Mahadek Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Image

Cephalopods

Cephalopods of the Mahadek Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Image

Gastropods

Gastropods of the Mahadek Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Image

Echinoderms

Echinoderms of the Mahadek Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Image

Ichnofossils

Ichnofossils of the Mahadek Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Image

See also

• Earth sciences portal
• Paleontology portal
• Dinosaurs portal

• List of dinosaur-bearing rock formations
  • List of stratigraphic units with indeterminate dinosaur fossils

Footnotes

1. Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
2. Sauro, Francesco; Mecchia, Marco; Tringham, Mark; Arbenz, Thomas; Columbu, Andrea; Carbone, Cristina; Pisani, Luca; Waele, Jo De (15 June 2020). "Speleogenesis of the world's longest cave in hybrid arenites (Krem Puri, Meghalaya, India)". Geomorphology. 359 (6). doi:10.1016/j.geomorph.2020.107160.
3. "Meghalaya: At over 24,000 metres in length, world's longest sandstone cave found". Hindustan Times. 20 March 2018. Retrieved 21 December 2025.

References

• Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. 861 pp.  ISBN   0-520-24209-2.