The interpretation of 19 bore cores from the sea floor west of Rote Kliff (Isle of Sylt, North-Frisian Islands) gave information about the thickness of Holocene sand and the sediments below it; especially regarding their resistance to erosion in the area seaward of the beach-barrier. At the Same time, additional knowledge was obtained about the development of Sylt.

Grain size values were originally given in zeta degrees and were transformed to mm using the following equation: grain size [mm] = 10*-(grain size [zeta °])2.

Supplement to: Hoffmann, Dietrich (1971): Zur Geologie des Seegebietes westlich von Sylt. Meyniana, 21, 25-31