| | Geology of the Alps (Site not responding. Last check: 2007-10-29) |
 | | North of the Periadriatic seam the three main nappe stacks of the Alps are found: the Helvetic, Penninic and Austroalpine nappes. |
 | | This subdivision is more or less according to the paleogeographical origins of the rocks found in the units: the Helvetic nappes contain material from the European plate, the Austroalpine nappes material from the Apulian plate, the Penninic nappes material from the domains that existed in between the two plates. |
 | | In many spots in the central zone north of the Periadriatic seam large antiforms called anticlinoria can be found, sometimes they are displayed in the outcrops as windows. |
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