Abstract
Abstract Two regional phases of alpine metamorphism developed contemporaneously in the inner zones of the Hellenides: the first phase was after the Triassic, probably in the upper Jurassic, and earlier than the upper Maestrichtian or even the Aptian-basal Albian; the second phase was after the upper Maestrichtian but before the lower Oligocene, probably in the Priabonian. In addition, a phase of dynamic metamorphism was manifest locally in the foreland of the Serbo-Macedonian massif, in volcanic and tuffaceous formations of middle-upper Eocene age; it was contemporaneous with the late Priabonian tectonic phase. Hercynian and pre-Hercynian cores are both represented in the inner Hellenides and were affected by the alpine metamorphism.
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