What Are U Shaped Valleys? A U-shaped valley is a geomorphological formation with high, steep sides and a flat or rounded valley bottom. These valleys are formed by glaciation. They are often filled with lakes or rivers, sandtraps along a golf course, kettle lakes (water hazards), or other natural features. https://sofas-and-couches86292.theideasblog.com/30252763/8-tips-to-increase-your-sectional-u-shape-game