What Are U Shaped Valleys? A U-shaped valley is a geological formation that has steep, high sides as well as flat or rounded valley bottom. These valleys are formed by glaciation. They usually contain lakes or rivers, sandtraps along a golf course, kettle lakes (water hazards), or other natural features. https://sofasandcouches12472.bloginder.com/30403199/what-sectional-u-shape-experts-want-you-to-know