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Natural Monument - Traces of the Ice Age - Boulders or erratic blocks

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These boulders or erratic blocks either fell onto the glacier surface in the Alps or were scooped up from the ground by the ice and transported further down the valley. They provide evidence that the alpine foreland was once almost entirely covered by glaciers. The thickness of the ice in the area of Lucerne measured 1,000 metres. The large, light-coloured granite boulder from the Gotthard region weighs 5 tons.

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Boulders or erratic blocks Bild 272
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