Geest core

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Red cliff near Kampen on Sylt

As Geest core refers to the core of an island in the North or Baltic Sea , which is not caused by marine sedimentation.

These cores represent all remnants of glacial deposits from the last ice ages, the geest , which in recent geological development were surrounded by marine sediments, i.e. sand, and thus form today's islands.

Both the East Frisian Islands and the West Frisian Islands all have no geest core, so they are sand or marsh islands. In contrast, some North Frisian Islands have a corresponding island core. In the case of Sylt, the central part of the island rests on a geest core, which also creates the characteristic red cliff between the towns of Wenningstedt and Kampen . The North Frisian islands of Amrum and Föhr also have similar geestral cores. The islands further north ( Danish Wadden Sea Islands ) are again free of geest cores and consist almost exclusively of sand.

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