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://couch63982.bloggerchest.com/29776956/a-guide-to-sectional-u-shape-from-beginning-to-end