The Khuren Dukh Formation, also known as the Khukhtyk Formation, Khukhteeg Formation, or Hühteeg Svita, (Mongolian: Хөхтээг формаци, Khökhteeg Formatsi), is a geological formation in Mongolia whose strata date back to the Aptian–Albian ages of the Early Cretaceous.[2][3] Dinosaur remains are among the fossils that have been recovered from the formation.[4]
The earliest record of Pachycephalosauria.[5]
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