Deep seismic-reflection data across the frontal part of the Carpathian arc image subducted European continental crust beneath the thick accretionary wedge of the Neogene west Carpathian arc. The upper continental crust of the lower plate is depressed with high curvature to a depth off about 25 km below the arc, but the corresponding Moho appears to be nearly horizontal. Flow within the lower crust may account for strain mismatch between the two parts of the subductiog continent, although the subdued relief on the Moho may partly have evolved after subduction ceased, perhaps owing to a gabbro-eclogite phase change in a mafic lower crust.

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