Biostratigraphy of the Furongian (upper Cambrian) Alum Shale Formation at Degerhamn, Öland, Sweden

AbstractThe Furongian (upper Cambrian) Alum Shale at Degerhamn, southern Oland, Sweden, has been systematically sampled for macrofossils. Two sections were investigated, one in a large abandoned Alum Shale quarry and one in a nearby road section. The 6.25 m thick succession comprises the Olenus, Parabolina, Leptoplastus, Protopeltura and Peltura superzones. The Olenus gibbosus, Olenus truncatus, Olenus attenuatus, Parabolina spinulosa, Leptoplastus crassicornis–Leptoplastus angustatus, Sphaerophthalmus flagellifer, Ctenopyge tumida, Ctenopyge linnarssoni and Parabolina lobata zones have been identified in addition to the informal Olenus rotundatus and Sphaerophthalmus modestus zones. The informal Olenus rotundatus biozone is assumed corresponding in age to the Olenus scanicus Chronozone and the informal Sphaerophthalmus modestus biozone is assumed corresponding in age to the Ctenopyge (Mesoctenopyge) similis Chronozone; S. modestus has not previously been reported from Oland. The uppermost parts of the O....