Donguz Formation
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| Donguz Formation | |
|---|---|
| Stratigraphic range: Anisian ~247–242 Ma | |
| 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 / 51.5; 55.2 |
| Approximate paleocoordinates | 33°36′N 43°12′E / 33.6°N 43.2°E / 33.6; 43.2 |
| Region | Bashkortostan Orenburg Oblast |
| Country | Russia |
| Type section | |
| Named for | Donguz River |
Donguz Formation is located in Russia Donguz Formation Donguz Formation (Russia) | |
The Donguz Formation, Donguz Svita, or Donguz Rocks (Russian: Донгузские скалы) is a Middle Triassic geological formation that crops out on the right bank of 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]
- Temnospondyls
- Eryosuchus antiquus , Ochev
- E. garjainovi , Ochev
- E. tverdochlebovi , Ochev
- Bukobaja ? sp.
- Plagiorophus danilovi
- Plagioscutum ochevi , Shishkin
- Plagiosternum paraboliceps (Konzhukova)
- Thecodonts
- Procolophonid
- Kapes serotinus , Novikov
- Proterosuchids
- Sarmatosuchus ochevi , Sennikov
- Erythrosuchids
- Uralosaurus magnus , (Ochev)
- Rauisuchidae
- Dongusia colorata , Huene
- Vjushkovisaurus berdjanensis , Ochev
- Euparkeriidae
- Dorosuchus neoetus , Sennikov
- Dicynodonts
- Kannemeyeria spp.
- Shansiodon (Rhinodicynodon ) gracile (Kalandadze)
- Therocephalians
- Dongusaurus schepetovi , Vyushkov
- Nothogomphodon danilovi , Tatarinov
- Diademodontids
- Scalenodon boreus , Tatarinov
- Traversodontids
- Antecosuchus ochevi , Tatarinov
- Therapsids
- Fish
- Archosaurs
- Dongusuchus efremovi , Sennikov
See also
[edit ]References
[edit ]- ^ a b c 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