What Are U Shaped Valleys? A U-shaped Valley is an ancient geological formation with high, steep sides and flat or rounded valley bottom. They are the result of glaciation and are frequently filled with lakes, rivers, sand traps on golf courses, kettle lakes (water hazards) and other natural features. The https://couch57586.59bloggers.com/30260871/7-things-you-d-never-know-about-sectional-u-shape