Reworked Carboniferous palynomorphs from the Lower Jurassic of Bornholm and their palaeogeographic significance

Reworked Carboniferous palynomorphs are found in the Lower Jurassic Ronne Formation on Bornholm. Carboniferous sediments are unknown in the Jurassic provenance areas, which were the Fennoscandian Shield and local highs in the Bornholm area. The northern-limit of proven Carboniferous sediments mainly follows the southern margin of the Ringkobing-Fyn Arkona High. However, structural evidence suggests that this limit is attributed to post-depositional uplift, faulting and erosion. The reworked palynomorphs indicate that Carboniferous sediments were originally deposited north of their present area of distribution. Down-faulting related to Permo-Carboniferous extension led to the preservation of Carboniferous deposits until uplift made the deposits available for erosion during the Late Trissic and Jurassic. -Authors