What Are U Shaped Valleys? A U-shaped valley is a geomorphological formation that has steep, high sides and a flat or rounded valley bottom. They result from glaciation and are frequently filled with lakes, rivers and sand traps on golf courses, kettle lakes (water hazards) and other natural features. Glacial https://couch82599.alltdesign.com/what-s-the-fuss-about-sectional-u-shape-49640820