The Bukobay Svita (also anglicized as Bukobay or Bukobai Formation) is a Middle Triassic geological unit in Russia.[1][2][3] It is composed primarily of red or grey lacustrine sediments, reconstructing a humid and marshy depositional environment. Bukobay is the youngest section of a Triassic terrestrial succession exposed south of the Ural Mountains. It is equivalent to a biostratigraphic unit, the Bukobay Gorizont, which is also called the "Bukobay Horizon" or "Mastodonsaurus" fauna).
| Bukobay Svita | |
|---|---|
| Stratigraphic range: Ladinian ~ | |
 "Mastodonsaurus" torvus, an index fossil of the Bukobay Svita / Gorizont | |
| Type | Stratigraphic Formation |
| Overlies | Donguz Svita |
| Lithology | |
| Primary | Claystone, siltstone |
| Other | Sandstone |
| Location | |
| Coordinates | 51°24′N 55°30′E / 51.4°N 55.5°E |
| Approximate paleocoordinates | 35°24′N 41°00′E / 35.4°N 41.0°E |
| Region | Orenburg, Bashkortostan |
| Country |  Russia |
  Bukobay Svita (Russia) | |
Fossil content
editNotable components of the Bukobay fauna include "Mastodonsaurus" torvus (a giant capitosaur amphibian), Malutinisuchus gratus and Energosuchus garjainovi, the insect Mesoneta uralensis, Elephantosaurus jachimovitschi (a large dicynodont), and Chalishevia cothurnata (the youngest known erythrosuchid). Temnospondyls include Bukobaja enigmatica, Cyclotosaurus, Plagioscutum caspiense and Plagiorophus paraboliceps, with Ceratodus orenburgensis and C. bucobaensis as fish. The flora is also diverse, including Equisetites arenaceus (a species of giant horsetails) and Ladinian-age palynomorphs.[4][5]
See also
edit- Triassic land vertebrate faunachrons
- Erfurt Formation, contemporaneous fossiliferous formation of Germany
- Wetterstein Formation, contemporaneous fossiliferous formation of the Alps
- Omingonde Formation, contemporaneous fossiliferous formation of Namibia
- Santa Maria Formation, contemporaneous fossiliferous formation of Brazil
References
edit- ^ Bukobay Formation at Fossilworks.org
- ^ Bukobai Formation at Fossilworks.org
- ^ Bukobaiskaya Suite at Fossilworks.org
- ^ Tverdokhlebov et al., 2003
- ^ Tverdokhlebov et al., 2020
Bibliography
edit- Tverdokhlebov, V. P.; Sennikov, A. G.; Novikov, I. V.; Ilyina, N. V. (2020). "The Youngest Triassic Land Vertebrate Assemblage of Russia: Composition and Dating". Paleontological Journal. 54 (3): 297–310. Bibcode:2020PalJ...54..297T. doi:10.1134/S0031030120030156. S2CID 219958855.
- Tverdokhlebov, Valentin P.; Tverdokhlebova, Galina I.; Surkov, Mikhail V.; Benton, Michael J. (2003). "Tetrapod localities from the Triassic of the SE of European Russia". Earth-Science Reviews. 60 (1): 1–66. Bibcode:2003ESRv...60....1T. doi:10.1016/S0012-8252(02)00076-4.
- Schoch, R.; Milner, A. R. (2000). "Stereospondyli". Handbuch der Paläoherpetologie. 3B: 1–20.
Further reading
edit- I. A. Dobruskina. 1982. Triassic Floras of Eurasia. Akademia Nauk SSSR, Transactions 365:1-196