Bungenstock, F., Mauz, B., Schäfer, A.. The late Holocene sea level rise at the East Frisian coast (North Sea): New time constraints provided by optical ages of coastal deposits. In: Schernewski, G., Dolch, T. (eds.). Geographie der Meere und Küsten. Coastline Reports (1), pp. 37-41. 2004.

A high spatial density of core data (available from the Niedersächsisches Landesamt für Bodenforschung, NLfB, Hannover) on the sediment body constituting the East Frisian coast provided an optimal opportunity to study late Holocene sea level oscillations and, as a result, to establish a more detailed curve of Holocene sea level rise based on sedimentological data. Firstly, core data were analysed to recognise transgressive and regressive phases during the Holocene sea level rise at the East Frisian coast, and secondly, samples were collected from newly drilled cores to establish a time framework based on optical ages. By applying sequence stratigraphy on the NLfB core data two phases of transgressions and at least one phase of regression were recognised within the siliciclastic sedimentary record after the formation of the so called Upper Peat at about 1000 BC. These phases were also identified in the new cores and sampled for optical dating. The first transgressive phase started before ca 400 AD and lasted until 800 AD. The regressive phase occurred from ca 800 to ca 1220 AD and the second transgressive phase occurred from ca 1220 to nut much longer than 1400 AD.