Donguz Formation
| Donguz Formation | |
|---|---|
| Stratigraphic range: Anisian ~ | |
 Eryosuchus, an index fossil of the Donguz | |
| Type | Stratigraphic Formation |
| Underlies | Bukobay Svita[1] |
| Overlies | Petropavlovskaya Svita (Yarenskian Gorizont) |
| Lithology | |
| Primary | Sandstone |
| Other | Claystone, conglomerate |
| Location | |
| Coordinates | 51°30′N 55°12′E / 51.5°N 55.2°E |
| Approximate paleocoordinates | 33°36′N 43°12′E / 33.6°N 43.2°E |
| Region | Bashkortostan Orenburg Oblast |
| Country | Russia |
| Type section | |
| Named for | Donguz River |
  Donguz Formation (Russia) | |
The Donguz Formation, Donguz Svita, or Donguz Rocks (Russian: Донгузские скалы/Донгузская свита/Формация Донгуз) is a Middle Triassic geological formation that crops out on the right bank of the Donguz River in Orenburg Oblast, Russia, across the settlement of Pervomaisky. The formation is equivalent to a biostratigraphic unit, the Donguz Gorizont. It is famous for its rich collection of the fossils of Middle Triassic tetrapods.[2][1][3]
It is a nature monument (особо охраняемых природных территорий (ООПТ)).[4]
Fossil content
[edit]The following fossils have been found in the Donguz Formation:[1]
- Archosaurs
- Bystrowianidae indet.
- Dicynodonts
- Cristonasus koltaeviensi
- Calleonasus furvus
- Elatosaurus facetus
- Nasoplanites danilovi
- Parvobestiola bashkiriensis
- Rabidosaurus cristatus
- Rhadiodromus klimovi (previously Lystrosaurus klimovi), R. mariae
- Rhinodicynodon gracile
- ?Edaxosaurus edentatus (is currently considered a synonym of Uralokannemeyeria)
- Uralokannemeyeria vjuschkovi (former Kannemeyeria vjuschkovi)
- Dicynodontia indet.
- Kannemeyeriiformes indet.
- Erythrosuchids
- Uralosaurus magnus
- Garjainia prima (previously Vjushkovia tripliocostata)
- Euparkeriidae
- Pseudosuchia indet.
- Procolophonid
- Kapes majmesculae (previously K. serotinus)
- Rauisuchidae
- Traversodontidaes
- Thecodontia indet.
- Temnospondyls
- Therocephalians
- Fish
See also
[edit]References
[edit]- 1 2 3 Lucas, Spencer G (1 November 1998). "Global Triassic tetrapod biostratigraphy and biochronology". Palaeogeography, Palaeoclimatology, Palaeoecology. 143 (4): 347–384. Bibcode:1998PPP...143..347L. CiteSeerX 10.1.1.572.872. doi:10.1016/S0031-0182(98)00117-5.
- ↑ Sennikov, A.G. (29 February 1996). "Evolution of the Permian and Triassic tetrapod communities of Eastern Europe". Palaeogeography, Palaeoclimatology, Palaeoecology. 120 (3–4): 331–351. Bibcode:1996PPP...120..331S. doi:10.1016/0031-0182(95)00041-0.
- ↑ область&objregion=Оренбургский район
- ↑ Uraloved.ru