Porphyrit-Hornstein Formation

The Porphyrit-Hornstein Formation is a geologic formation in Montenegro. It preserves bivalve fossils dating back to the Ladinian of the Triassic period.

Fossil content
The following fossils were reported from the formation:
 * Bivalves
 * Ostreida
 * Halobiidae
 * Daonella (Arzelella) indica
 * Daonella (Pichlerella) pichleri