Bukachacha Formation
The Bukachacha Formation is a geological formation in Zabaykalsky Krai, Russia dating to the Early Cretaceous. The tuffaceous mudstones of the formation were deposited in a lacustrine environment.
Fossil content
The formation has provided fossil insects:- Coleoptera
- * Coptoclavidae
- ** Stygeonectes jurassicus
- Trichoptera
- * Phryganeidae
- ** Proagrypnia sp.
- Ephemerida
- * Hexagenitidae
- ** ''Ephemeropsis trisetalis''