Old crystalline

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In European geology, crystalline rocks are known as old crystalline , which were mainly formed in the Variscan era (middle Paleozoic ).

In Central Europe - depending on the region - outside the Alps, these are predominantly Variscan (partly Cambrian) granites , granodiorites and gneisses , in the Bohemian masses also granulite ; furthermore migmatites , orthoseries, paraseries with amphibolites , in the Eastern Alps series from granites to orthogneiss , locally also phyllites and mica schists as well as limestone marble.