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.

Fossil content
The formation has provided fossil insects:


 * Coleoptera
 * Coptoclavidae
 * Stygeonectes jurassicus
 * Trichoptera
 * Phryganeidae
 * Proagrypnia sp.
 * Ephemerida
 * Hexagenitidae
 * Ephemeropsis trisetalis