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 courses, kettle lakes (water hazards), or other natural features. https://sofas-and-couches25605.mpeblog.com/53607439/what-is-sectional-u-shape-and-why-is-everyone-talking-about-it