Bukachacha Formation Explained

Bukachacha Formation
Period:	Barremian
Age:	Barremian ~
Type:	Geological formation
Prilithology:	Mudstone
Otherlithology:	Tuff
Coordinates:	53°N 116.9°W
Paleocoordinates:	56.7°N 114.9°W
Region:	Zabaykalsky Krai
Namedfor:	Bukachacha

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]
• Trichoptera
  • Phryganeidae
    • Proagrypnia sp.^[3]
• Ephemerida
  • Hexagenitidae
    • Ephemeropsis trisetalis^[4]

See also

• List of fossiliferous stratigraphic units in Russia
• Batylykh Formation, contemporaneous fossiliferous formation of Buryatia

References

Bibliography

Notes and References

1. http://www.fossilworks.org/cgi-bin/bridge.pl?a=collectionSearch&collection_no=152176 Bukachacha
2. Ponomarenko, 1990
3. Sukatsheva, 2016, p.401
4. Sinitshenkova, 1990