Allgäu Formation


The Allgäu Formation is a geologic formation in Austria, Germany and Slovakia. It preserves fossils dating back to the Hettangian to Sinemurian stages of the Early Jurassic period, or Raricostatum to Obtusum in the regional stratigraphy. Initially and formally defined by Jacobshagen. The Allgäu Formation is formerly known as spotted marls and spotted marly limestones. The formation is represented by dark-grey bioturbated limestones and marlstone interbeds. It represents basinal hemipelagic facies common in Alpine Tethys regions of Alps, Carpathians and other mountain ranges. Several horizons of the formation are particularly rich in ammonite fauna.

Fossil content

;FishAgkistracanthus sp.
;AmmonitesEchioceras raricostatoidesEpophioceras landriotiLeptechioceras meigeniAsteroceras cf. suevicumJuraphyllites sp.Paltechioceras sp.Villania sp.
;RhynchonellataCarapezzia engadinensisSulcirostra doesseggeri
  • ''Sulcirostra cf. zitteli''