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

Contents

Dinosaurs

Dinosaurs

★ ''Achillobator'', a giant dromaeosaur

★ ''Alectrosaurus'', a tyrannosaur

★ ''Albertosaurus'', a tyrannosaur

★ ''Amtosaurus'', an ankylosaur

★ ''Enigmosaurus'', a therizinosaur

★ ''Erlikosaurus'', a therizinosaur

★ ''Garudimimus'', an ornithomimosaur

★ ''Graciliceratops'', a primitive ceratopsian

★ ''Maleevus'', an ankylosaur

★ ''Microceratops'', a primitive ceratopsian

★ ''Segnosaurus'', a therizinosaur

★ ''Talarurus'', an ankylosaur

★ ''Therizinosaurus'', a giant therizinosaur

★ ''Tsagantegia'', an ankylosaur

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