What Are U Shaped Valleys? A U-shaped Valley is a geological formation that has steep, high sides and flat or rounded valley bottom. They result from glaciation and are frequently home to lakes, rivers and sand traps found on golf courses, kettle lakes (water hazards), and other such natural features. https://sofasandcouches02462.blogunteer.com/29191165/why-all-the-fuss-about-sectional-u-shape