Bukachacha Formation
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.
| Bukachacha Formation Stratigraphic range: Barremian ~129–125 Ma | |
|---|---|
| Type | Geological formation |
| Lithology | |
| Primary | Mudstone |
| Other | Tuff |
| Location | |
| Coordinates | 53.0°N 116.9°E |
| Approximate paleocoordinates | 56.7°N 114.9°E |
| Region | Zabaykalsky Krai |
| Country |  Russia |
| Type section | |
| Named for | Bukachacha |
  Bukachacha Formation (Russia) | |
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. 396–405. Accessed 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.
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