Dushihin Formation
Early Cretaceous geologic formation in Mongolia
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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.
| Dushihin Formation | |
|---|---|
| Stratigraphic range: Aptian | |
| Type | Geological formation |
| Lithology | |
| Primary | Claystone, conglomerate |
| Location | |
| Coordinates | 45.4°N 101.7°E |
| Approximate paleocoordinates | 46.5°N 101.7°E |
| Region | Övörkhangai Province |
| Country | Mongolia |
  Dushihin Formation (Mongolia) | |
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]