Cannabis Ruderalis October 12, 2016 thcscience_admin Geologic formation in Germany Honseler Schichten FormationStratigraphic range: DevonianTypeFormationLocationCountry Germany The Honseler Schichten Formation is a geologic formation in Germany. It preserves fossils dating back to the Devonian period. See also[edit] List of fossiliferous stratigraphic units in Germany References[edit]