Lower Cretaceous sedimentation and basin extension on Bornholm, Denmark

The Tithonian?-Berriasian Rabekke and Robbedale Formations on Bornholm, Denmark rest unconformably on Lower Jurassic sand and clay and overstep Lower Palaeozoic sandstone and Precambrian basement. The sediments were deposited in two different episodes. The Skyttegård Member (Rabekke Formation) and the Østerborg Member (Robbedale Formation) were deposited during a transgressive phase when marine low-energy intertidal beach and tidal sand flat sediments transgressed landward over fluvial, intertidal/supratidal swamp and coastal lagoon sediments. The Langbjerg Member (Robbedale Formation) was deposited during a general shoreline progradation under high-energy conditions. The lower part of the overlying Berriasian-Valanginian Jydegard Formation was deposited in coastal lagoons migrating seawards over subtidal, intertidal and barrier sand. The sedimentation pattern is related to eustatic sea level changes and to tectonic block-subsidence in the Fenno-Scandian Border Zone caused by the Late-Kimmerian tectonic episode.