What Are U Shaped Valleys? A U-shaped valley is an edifice of geology that has steep, high sides and flat or rounded valley bottom. They are the result of glaciation and are frequently filled with lakes, rivers, sand traps on golf courses, kettle lakes (water hazards) and other natural features. https://www-sofasandcouches-com16285.dgbloggers.com/30183914/an-all-inclusive-list-of-sectional-u-shape-dos-and-don-ts