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Many cirques, U-shaped valleys and moraines and jagged ridges and summits bear the evidence of the glacial erosion.
en.wikipedia.org The canyon was formed by glaciers which retreated at the end of the last glacial maximum approximately 15,000 years ago, leaving behind a U-shaped valley.
en.wikipedia.org There is evidence of many features of glaciation, such as corries, U-shaped valleys, and paternoster lakes, evidence of the effects of the last ice age.
en.wikipedia.org Glacial activity has shaped the landscape 3000 m above mean sea level, leaving U-shaped valleys and moraines behind.
en.wikipedia.org The river here is in a U-shaped valley meandering slightly in a south-westerly direction.
en.wikipedia.org