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Helvetic nappes : ウィキペディア英語版 | Helvetic nappes The Helvetic nappes ((ドイツ語:Helvetische Decken)) are a series of nappes in the Northern part of the Alps and part of the Helvetic zone. They consist of Mesozoic limestones, shales and marls that were originally deposited on the southern continental margin of the European continent. During the Alpine orogeny they were thrusted north over a décollement and at the same time were internally deformed by folding and thrusting. ==Tectonic location== The Helvetic nappes are thrusted over the Infrahelvetic complex and the external massifs of the Alps (like the Aarmassif or Mont Blanc Massif). In Switzerland, Germany and Austria they are also thrusted over the Molasse basin of the Alpine foreland. In turn, the Helvetic nappes were overthrusted by the Penninic nappes from the south. In Switzerland these have been eroded away at most places but in Germany and Austria they are still covering the Helvetic nappes. Due to this the Helvetic nappes only crop out as a thin band in those countries, which forms the Northern Limestone Alps.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Helvetic nappes」の詳細全文を読む
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