What Are U Shaped Valleys? A U-shaped valley is an ancient geological formation with steep, high sides as well as flat or rounded valley bottom. They result from glaciation, and are usually home to lakes, rivers and sand traps on golf courses kettle lakes (water hazards) and other natural features. https://couch55698.bligblogging.com/30419357/sectional-u-shape-tips-from-the-best-in-the-industry