Bayan Shireh Formation

The Bayan Shireh Formation is a geological formation in Burkhant, Mongolia, that stems from the Campanian stage of the late Cretaceous period, 83.5 million–70 million years ago. The fauna of this formation is similar to the nearby Iren Dabasu Formation.

Fossils found at Bayan Shireh include:

Dinosaurs

* Several indeterminate fossils of ornithomimids, hadrosaurs, and theropods.

Ceratopsians

* "Graciliceratops", a primitive ceratopsian
* "Microceratus", a primitive ceratopsian

Theropods

* "Achillobator", a giant dromaeosaur
* "Alectrosaurus", a tyrannosaur
* "Albertosaurus", a tyrannosaur
* "Enigmosaurus", a therizinosaur
* "Erlikosaurus", a therizinosaur
* "Garudimimus", an ornithomimosaur
* "Segnosaurus", a therizinosaur
* "Therizinosaurus", a giant therizinosaur

Ankylosaurs