What Are U Shaped Valleys? A U-shaped valley is a geological formation with high, steep sides and a flat or rounded valley bottom. These valleys are formed by glaciation. They are often filled with lakes, rivers, sandtraps on golf course, kettle lakes (water hazards) or other natural features. Glacial erosion https://www-sofasandcouches-com61322.blogsuperapp.com/30347645/sectional-u-shape-tips-that-will-revolutionize-your-life