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]
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°54′N 108°24′E / 45.9°N 108.4°E |
Approximate paleocoordinates | 49°18′N 100°12′E / 49.3°N 100.2°E |
Region | Dornogovi Province |
Country | ![]() |
Extent | Choyr Basin |
Vertebrate paleofauna
Dinosaurs
The earliest record of Pachycephalosauria.[5]
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."[6] | A hadrosauroid ornithopod | |||
Choyrodon[7] | C. barsboldi | Partial skull, cervical ribs | A hadrosauroid ornithopod | ![]() | ||
Iguanodon | I. orientalis | An indeterminate Iguanodont. A referred skull was reclassified as Altirhinus. | ||||
Harpymimus[8] | H. okladnikovi | Partial skeleton | An ornithomimosaur | ![]() |
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; |
See also
References
Bibliography
- Gates, Terry A.; Tsogtbaatar, Khishigjav; Zanno, Lindsay E.; Chinzorig, Tsogtbaatar; Watabe, Mahito (2018), "A new iguanodontian (Dinosauria: Ornithopoda) from the Early Cretaceous of Mongolia", PeerJ, 6: e5300, doi:10.7717/peerj.5300, PMC 6078070, PMID 30083450
- Nichols, Douglas J.; Matsukawa, Masaki; Ito, Makoto (2006), "Palynology and age of some Cretaceous nonmarine deposits in Mongolia and China", Cretaceous Research, 27 (2): 241–251, Bibcode:2006CrRes..27..241N, doi:10.1016/j.cretres.2005.11.004, ISSN 0195-6671
- Weishampel, David B.; Dodson, Peter; Osmólska, Halszka (2004), The Dinosauria, 2nd edition, Berkeley: University of California Press, pp. 1–880, ISBN 0-520-24209-2, retrieved 2019-02-21
- Barsbold, R.; Perle, A. (1984), "On first new find of a primitive orithomimosaur from the Cretaceous of the MPR", Paleontologicheskii Zhurnal, 2: 121–123
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