5Glaciers can shape whole landscapes

The sheer weight of the ice in a glacier is what causes it to start moving down the mountain.

As they do, they erode the terrain beneath them, plucking away at the bedrock beneath as well as acting like sandpaper as they abrade and smooth as well. This results in V-shaped mountain valleys transforming into deepened U-shaped valleys – the first clue that proves a region has been altered by glaciation.

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