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> Home > Find Out More > Twinning Sites > Lomond Glaciers > page 5: Hanging ValleysAs a glacier bulldozes its way down a valley, it cuts into the sides of the valley, making them steeper. In places, smaller, less powerful (erosive), tributary glaciers join the main glacier. However, they cannot erode down as deeply as the larger glacier in the main valley, and so when the ice melts, hanging valleys are left behind – valleys which meet the main valley, but at a higher level. Often, streams flow over these hanging valleys as waterfalls.
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