What Are U Shaped Valleys? A U-shaped valley is a geomorphological formation with steep, high sides and a flat or rounded valley bottom. These valleys are created by glaciation. They are often filled with lakes or rivers, sandtraps along a golf courses kettle lakes (water hazards), or other natural features. https://www-sofasandcouches-com80065.canariblogs.com/10-books-to-read-on-sectional-u-shape-45147937