Khuren Dukh Formation
Geological formation in Mongolia
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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]
Sub-unitsLower, Middle & Upper Members
UnderliesTerrace deposit, Basalt
OverliesKhalzan Uul Formation, Basement
| Khuren Dukh Formation | |
|---|---|
| Stratigraphic range: Early Cretaceous (Aptian–Albian),[1] | |
| Type | Geological formation |
| Sub-units | Lower, Middle & Upper Members |
| Underlies | Terrace deposit, Basalt |
| Overlies | Khalzan Uul Formation, Basement |
| Thickness | Over 100 m (330 ft) |
| Lithology | |
| Primary | Sandstone, conglomerate, siltstone, mudstone |
| Location | |
| Coordinates | 45.9°N 108.4°E |
| Approximate paleocoordinates | 49.3°N 100.2°E |
| Region | Dornogovi Province |
| Country | Mongolia |
| Extent | Choyr Basin |
  Khuren Dukh Formation (Mongolia) | |
Vertebrate paleofauna
Dinosaurs
| Dinosaurs of the Khuren Dukh Formation (Hühteeg Svita) | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Altirhinus | A. kurzanovi | "Complete skull, partial skull, associated postcrania, several individuals."[5] | A hadrosauroid ornithopod |  | ||
| Choyrodon[6] | C. barsboldi | Partial skull, cervical ribs | A hadrosauroid ornithopod |  | ||
| Iguanodon | I. orientalis | An indeterminate Iguanodont. A referred skull was reclassified as Altirhinus. | ||||
| Harpymimus[7] | H. okladnikovi | Partial skeleton | An ornithomimosaur | .jpg) | ||
| Zavacephale[8] | Z. rinpoche | Skull and partial articulated skeleton | An early pachycephalosaur |  | ||
Choristoderes
| Choristoderes of the Khuren Dukh Formation (Hühteeg Svita) | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Khurendukhosaurus | K. orlovi, Indeterminate | Partial skeleton | Long-necked choristodere |  | ||
| Tchoiria | T. namsarai | Crocodile-like neochoristoderan. | ||||
Color key
|
Notes Uncertain or tentative taxa are in small text; |