Khuren Dukh Formation

Khuren Dukh Formation
Stratigraphic range: Early Cretaceous
(Aptian–Albian), 119.7–100 Ma
TypeGeological formation
Sub-unitsLower, Middle & Upper Members
UnderliesTerrace deposit, Basalt
OverliesKhalzan Uul Formation, Basement
ThicknessOver 100 m (330 ft)
Lithology
PrimarySandstone, conglomerate, siltstone, mudstone
Location
Coordinates45°54′N 108°24′E / 45.9°N 108.4°E / 45.9; 108.4
Approximate paleocoordinates49°18′N 100°12′E / 49.3°N 100.2°E / 49.3; 100.2
RegionDornogovi Province
CountryMongolia
ExtentChoyr Basin
Khuren Dukh Formation is located in Mongolia
Khuren Dukh Formation
Khuren Dukh Formation (Mongolia)

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. Dinosaur remains are among the fossils that have been recovered from the formation.

Fossil cotent

Color key
Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon

Notes
Uncertain or tentative taxa are in small text
crossed out taxa are discredited.

Dinosaurs

Ornithischians

Ornithischians of the Khuren Dukh Formation
Genus Species Location Stratigraphic position Material Notes Image
Altirhinus A. kurzanovi "Complete skull, partial skull, associated postcrania, several individuals". A hadrosauroid ornithopod
Choyrodon C. barsboldi Partial skull, cervical ribs. A hadrosauroid ornithopod
Iguanodon I. orientalis An indeterminate Iguanodontian; a referred skull was reclassified as Altirhinus.
Zavacephale Z. rinpoche Skull and partial articulated skeleton. An early pachycephalosaur

Theropods

Theropods of the Khuren Dukh Formation
Genus Species Location Stratigraphic position Material Notes Image
Harpymimus H. okladnikovi Partial skeleton. A ornithomimosaurian theropod

Choristoderes

Choristoderes of the Khuren Dukh Formation
Genus Species Location Stratigraphic position Material Notes Image
Khurendukhosaurus K. orlovi Partial skeleton. A long-necked choristodere
Indeterminate
Tchoiria T. namsarai A crocodile-like neochoristoderan choristodere

See also

References

  1. ↑ Hasegawa, Hitoshi; Ando, Hisao; Hasebe, Noriko; Ichinnorov, Niiden; Ohta, Tohru; Hasegawa, Takashi; Yamamoto, Masanobu; Li, Gang; Erdenetsogt, Bat-Orshikh; Heimhofer, Ulrich; Murata, Takayuki; Shinya, Hironori; Enerel, G.; Oyunjargal, G.; Munkhtsetseg, O. (2018-02-27). "Depositional ages and characteristics of Middle– Upper Jurassic and Lower Cretaceous lacustrine deposits in southeastern Mongolia". Island Arc. 27 (3). Bibcode:2018IsArc..27E2243H. doi:10.1111/iar.12243. ISSN 1038-4871.
  2. ↑ Nosova, Natalya; Kostina, Elena (2022-09-01). "New findings of the female reproductive structures of Umaltolepis Krassilov and associated leaves of Pseudotorellia Florin in the Lower Cretaceous of Mongolia". Review of Palaeobotany and Palynology. 304 104696. Bibcode:2022RPaPa.30404696N. doi:10.1016/j.revpalbo.2022.104696. ISSN 0034-6667.
  3. ↑ Nichols et al., 2006
  4. ↑ Weishampel et al., 2004, pp.563-570
  5. ↑ "Table 19.1," in Weishampel, et al. (2004). Page 415.
  6. ↑ Gates et al., 2018
  7. ↑ Chinzorig, Tsogtbaatar; Takasaki, Ryuji; Yoshida, Junki; Tucker, Ryan T.; Buyantegsh, Batsaikhan; Mainbayar, Buuvei; Tsogtbaatar, Khishigjav; Zanno, Lindsay E. (September 17, 2025). "A domed pachycephalosaur from the early Cretaceous of Mongolia". Nature: 1–8. doi:10.1038/s41586-025-09213-6. ISSN 1476-4687.
  8. ↑ Barsbold & Perle, 1984

Bibliography