Bukachacha Formation
| Bukachacha Formation | |
|---|---|
| Stratigraphic range: Barremian ~ | |
| Type | Geological formation |
| Lithology | |
| Primary | Mudstone |
| Other | Tuff |
| Location | |
| Coordinates | 53°00′N 116°54′E / 53.0°N 116.9°E |
| Approximate paleocoordinates | 56°42′N 114°54′E / 56.7°N 114.9°E |
| Region | Zabaykalsky Krai |
| Country | Russia |
| Type section | |
| Named for | Bukachacha |
  Bukachacha Formation (Russia) | |
The Bukachacha Formation is a geological formation in Zabaykalsky Krai, Russia dating to the Early Cretaceous (Barremian). The tuffaceous mudstones of the formation were deposited in a lacustrine environment.
Fossil content
The formation has provided fossil insects:[1]
- Coleoptera
- Coptoclavidae
- Stygeonectes jurassicus[2]
- Coptoclavidae
- Trichoptera
- Phryganeidae
- Proagrypnia sp.[3]
- Phryganeidae
- Ephemerida
- Hexagenitidae
- Ephemeropsis trisetalis[4]
- Hexagenitidae
See also
- List of fossiliferous stratigraphic units in Russia
- Batylykh Formation, contemporaneous fossiliferous formation of Buryatia
References
- ^ Bukachacha at Fossilworks.org
- ^ Ponomarenko, 1990
- ^ Sukatsheva, 2016, p.401
- ^ Sinitshenkova, 1990
Bibliography
- Sukatsheva, I.D (2016), "The family Phryganeidae (Insecta, Trichoptera) from the Mesozoic and Cenozoic of Asia (with a brief worldwide overview of the fossil caddisfly fauna)", Paleontological Journal, 50 (4): 396–405, Bibcode:2016PalJ...50..396S, doi:10.1134/S0031030116040134, retrieved 2020-07-07
- Ponomarenko, A.G (1990), "Beetles, Scarabaeida, in Pozdne-Mezozoyskie Nasekomye Vostochnogo Zabaykal'ya", A.P. Rasnitsyn (Ed.), Akademiya Nauk SSSR, Trudy Paleontologicheskogo Instituta, 239: 39–82
- Sinitshenkova, N.D (1990), "Mayflies. Ephemerida, in Pozdne-Mezozoyskie Nasekomye Vostochnogo Zabaykal'ya", A. P. Rasnitsyn (Ed.), Akademiya Nauk SSSR, Trudy Paleontologicheskogo Instituta, 239: 14–20