What Are U Shaped Valleys? A U-shaped valley is a geomorphological formation with steep, high sides and a rounded or flat 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://couches08892.activablog.com/29366294/what-s-the-reason-sectional-u-shape-is-quickly-becoming-the-hottest-trend-of-2023