Earth:Dushihin Formation
| Dushihin Formation Stratigraphic range: Aptian 125–113 Ma | |
|---|---|
| Type | Geological formation |
| Lithology | |
| Primary | Claystone, conglomerate |
| Location | |
| Coordinates | [ ⚑ ] : 45°24′N 101°42′E / 45.4°N 101.7°E |
| Paleocoordinates | [ ⚑ ] 46°30′N 101°42′E / 46.5°N 101.7°E |
| Region | Övörkhangai Province |
| Country |  Mongolia |
  Dushihin Formation (Mongolia) | |
The Dushihin Formation is an Early Cretaceous (Aptian) geologic formation in the Övörkhangai Province of Mongolia.[1] The formation preserves fossils of Psittacosaurus mongoliensis and fossil eggs described as Trachoolithus faticanus.
Description
The formation comprises concretionary, calcareous claystones and concretionary, brown, gray, green, blue, calcareous claystones with large flattened lime concretions. Within 3 metres (9.8 ft) in the formation is a lens of lighter grayish-brown clay with green and blue spots and small lime concretions. In the lens is also an inclusion of blue, pale purple-spotted aleurite. The depositional environment has been interpreted as lacustrine.[2]
Fossil content
The following fossils were reported from the lacustrine claystones and conglomerates of the formation:[1]
- Dinosaurs
- Fossil eggs
- Trachoolithus faticanus[5]
- Elongatoolithidae indet.[6]
- Spheroolithidae indet.[6]
- Squamata
See also
- List of dinosaur-bearing rock formations
- List of stratigraphic units with dinosaur eggs
- Andaikhudag Formation
- Khuren Dukh Formation
- Tsagaantsav Formation
References
- ↑ 1.0 1.1 Dushihin Formation in the Paleobiology Database
- ↑ Builjasutuin-Khuduk in the Paleobiology Database
- ↑ Shuvalov, 1975
- ↑ 4.0 4.1 4.2 Kurzanov & Mikhailov, 1989
- ↑ Mikhailov, 2000
- ↑ 6.0 6.1 Mikhailov et al., 1994
Bibliography
- Mikhailov, K.E. 2000. Eggs and eggshells of dinosaurs and birds from the Cretaceous of Mongolia. In M. J. Benton, M. A. Shishkin, D. M. Unwin, & E N. Kurichkin (eds.), 560–572. The Age of Dinosaurs in Russia and Mongolia.
- Mikhailov, K.; K. Sabath, and S. Kurzanov. 1994. Eggs and nests from the Cretaceous of Mongolia. In K. Carpenter, K. F. Hirsch, and J. R. Horner (eds.), Dinosaur Eggs and Babies, 88–115. Cambridge University Press, Cambridge.
- Kurzanov, S.M., and K.E. Mikhailov. 1989. Dinosaur eggshells from the Lower Cretaceous of Mongolia, 109–113. D. D. Gillette and M. G. Lockley (eds.), Dinosaur Tracks and Traces. Cambridge University Press, Cambridge.
- Shuvalov, V.F. 1975. Novoe Mestonakhozhdenie rannemelovykh dinozavrov Buylyasutuin-Khuduk - A new locality of Early Cretaceous dinosaurs, Buylyasutuin-Khuduk - in N. Kramarenko, B. Luwsandansan, Yu. Voronin, R. Barsbold, A. Rozhdestvensky (eds.), Iskopaemaya Fauna I Flora Mongolii [Fossil Flora and Fauna of Mongolia]. Sovmestnaya Sovetsko-Mongol'skaya Paleontologicheskaya Ekspeditsiya, Trudy - The Joint Soviet-Mongolian Paleontological Expedition, Transactions 2. 210–213.
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