Nemegt Formation

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The Nemegt Formation (or Nemegtskaya Svita) is a geological formation dating from the Late Cretaceous sedimentary from the Gobi Desert of Mongolia. It overlies and sometimes forms folds with the Barun Goyot Formation.^{[citation needed]} It consists of river channel sediments and contains fossils of fish, turtles, crocodilians, birds and a diverse fauna of dinosaurs. The climate associated with it was wetter than when preceding formations were deposited; there seems to have existed at least some degree of forest cover.

The absolute age of the Nemegt Formation is unknown but it is thought to be Maastrichtian or maybe late Campanian in age, very roughly some 76-65 million years old.^[1] The presence of Saurolophus, a taxon also known from the Horseshoe Canyon Formation of Alberta, may indicate an Early Maastrichtian age, around 70 million years old.^{[citation needed]}

1 Flora and fauna of the Nemegt Formation
2 References
3 See also

[edit] Flora and fauna of the Nemegt Formation

[edit] Theropod dinosaurs and birds

Illustration of Therizinosaurus cheloniformis.

Articulated skeletons of adult Tarbosaurus are unusually common here.

Adasaurus mongoliensis (Theropoda: Dromaeosauridae)^[1]
Alioramus remotus (Theropoda: Tyrannosauridae)^[1]
Anserimimus planinychus (Theropoda: Ornithomimidae)
Bagaraatan ostromi (Theropoda indet.)
Borogovia gracilicrus (Theropoda: Troodontidae)
Deinocheirus mirificus (Theropoda: Deinocheiridae)^[1]
Elmisaurus rarus (Theropoda: Caenagnathidae)
Gallimimus bullatus (Theropoda: Ornithomimidae)^[1]
Gurilynia nessovi (Aves: Enantiornithes)
"Ingenia" yanshini (Theropoda: Oviraptoridae)
Judinornis nogontsavensis (Aves: Hesperornithes)
Mononykus olecranus (Theropoda: Alvarezsauridae)
Nemegtomaia barsboldi (Theropoda: Oviraptoridae)
Rinchenia mongoliensis (Theropoda: Oviraptoridae)
Saurornithoides junior (Theropoda: Troodontidae)^[1]
Tarbosaurus bataar (Theropoda: Tyrannosauridae)^[1]
Teviornis gobiensis (Aves: Presbyornithidae?)
Therizinosaurus cheloniformis (Theropoda: Therizinosauridae)^[1]
Tochisaurus nemegtensis (Theropoda: Troodontidae)

[edit] References

^ ^a ^b ^c ^d ^e ^f ^g ^h Barsbold, R. (1983). "Carnivorous dinosaurs from the Cretaceous of Mongolia [in Russian]." Trudy, Sovmestnaâ Sovetsko−Mongol’skaâ paleontologičeskaâ èkspediciâ, 19: 1–120.