What Are U Shaped Valleys? A U-shaped valley is an ancient geological formation with steep, high sides as well as a flat or rounded valley bottom. These valleys are created by glaciation. They usually contain lakes rivers, sandtraps, sandtraps on golf courses kettle lakes (water hazards), or other natural features. https://sofasandcouches29286.pages10.com/a-step-by-step-guide-to-picking-the-right-sectional-u-shape-65443850