Barun Goyot Formation


The Barun Goyot Formation or Baruun Goyot Formation is a geological formation dating to the Late Cretaceous Period. It is located within and is widely represented in the Gobi Desert Basin, in the Ömnögovi Province of Mongolia.

Description

It was previously known as the "Lower Nemegt Beds" occurring beneath the Nemegt Formation and above the Djadokhta Formation. It has been suggested that the Djadokhta and Barun Goyot Formations are lower and upper parts, respectively, of the same lithological unit and the boundary between the two does not exist. The stratotype of the Barun Goyot Formation is the Khulsan locality, east of Nemegt. At Nemegt, only the uppermost barungoyotian beds are visible. The Red Beds of Khermeen Tsav are also considered part of the Barun Goyot Formation. It is approximately in thickness, and was laid down roughly 72-71 million years ago. Given the new date for the start of the Maastrichtian a basal Maastrichtian age seems probable. The Barun Goyot Formation preserves an environment of sand dunes, created from wind-eroded rocks.

Vertebrate paleofauna

Saurischians

Lizards

Mammals

Ornithischians

Eggs

OogenusOospeciesLocationMaterialNotes

Styloolithus
S. sabathi
  • Khulsan
Probably avian

Faveoloolithus
F. ningxiaensis
  • Ikh-Shunkht
Possibly sauropod eggs