What Are U Shaped Valleys? A U-shaped Valley is an edifice of geology that has high, steep sides and a flat or rounded valley bottom. These valleys are formed by glaciation. They usually contain lakes or rivers, sandtraps along a golf courses, kettle lakes (water hazards), or other natural features. https://sofasandcouches05599.theobloggers.com/35961781/why-sectional-u-shape-will-be-your-next-big-obsession