U-shaped valleys provide evidence of which proccess

Answer 1

U-shaped valleys provide strong evidence of glacial erosion. These valleys are formed by the persistent movement of glaciers, which carve out the landscape as they advance and retreat. Unlike V-shaped valleys typically formed by river erosion, U-shaped valleys have a wide, flat bottom and steep sides, characteristic of glacial activity. The process involves the glacier scraping and scooping material from the valley floor and sides, ultimately creating the distinctive U shape. Examples of U-shaped valleys can often be found in mountainous regions that have been glaciated, such as the Sierra Nevada in California and the valleys of the Swiss Alps.