What Are U Shaped Valleys? A U-shaped valley is a geomorphological formation with high, steep 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://www-sofasandcouches-com22267.activoblog.com/30586803/the-reasons-sectional-u-shape-is-everyone-s-obsession-in-2023