Beyrichienkalk Formation

The Beyrichienkalk Formation is a geologic formation in Gotland, Sweden. It preserves fossils dating back to the Silurian period. The formation is represented in erratic boulders found in:
 * Oderberg, Brandenburg, Germany
 * Voigtsdorf, Mecklenburg-Western Pomerania, Germany
 * Międzyzdroje, West Pomerania, Poland
 * Orłowo, Poland
 * Vistula River, Bydgoszcz, Kuyavia-Pomerania, Poland

Fossil content
The following fossils have been reported from the formation:


 * Cephalopods
 * Spyroceras damesi