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. They result from glaciation and are frequently the home of rivers, lakes, sand traps on golf courses, kettle lakes (water hazards) and other natural features. https://couch75594.blogolize.com/the-history-of-sectional-u-shape-in-10-milestones-69167601