Pircancha Formation

The Pircancha Formation is a Floian to Dapingian geologic formation of southern Bolivia. The green mudstones, shales and sandstones were deposited in a shallow to open marine environment. The fossil Pircanchaspis rinconensis is named after the formation.

Fossil content
The formation has provided the following fossils:


 * Bactroceras boliviensis
 * Baltograptus deflexus, B. minutus
 * Pircanchaspis rinconensis
 * Pseudophyllograptus densus
 * Tetragraptus cf. amii
 * Didymograptus cf. suecicus
 * Basilicus sp.
 * Dinorthis sp.
 * Famatinolithus sp.
 * Geragnostus sp.
 * Hoekaspis sp.
 * Phyllograptus sp.
 * Synhomalonotus sp.