Borehole evidence from the Isle of Rügen, and geophysical data from the adjacent Baltic Sea suggest a Caledonian deformation front that caused NNE-directed thrusting on the East European Platform. It is thought to mark a Caledonian suture zone which was reactivated in syn- to post-Variscan events to form the Rømiø-Møn Fault Zone.
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Katzung et al. (1993) studied this question.
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