What Are U Shaped Valleys? A U-shaped valley is an edifice of geology that has steep, high sides as well as a flat or rounded valley bottom. These valleys are formed by glaciation. They usually contain lakes, rivers, sandtraps on golf course, kettle lakes (water hazards) or other natural features. https://couch52854.rimmablog.com/29400328/a-look-at-the-good-and-bad-about-sectional-u-shape