Lithologies
The zone consists of Proterozoic orthogneisses and early Paleozoic volcanic (amphibolites with MORB-protoliths and tuffs) and sedimentary (pelites, calcareous schists and marbles) rocks that were metamorphosed at high grade during the Hercynian orogeny (up to amphibolite facies). These rocks were intruded by two generations of plutons: Silurian to Early Devonian (440-400 million years old) granitoids and middle Carboniferous (Hercynian, 340-325 million years old) granites.
Read more about this topic: Mid-German Crystalline High