What Are U Shaped Valleys? A U-shaped valley is an geological formation with high, steep sides and a flat or rounded valley bottom. They result from glaciation and are often the home of rivers, lakes and sand traps on golf courses kettle lakes (water hazards), and other such natural features. https://wwwsofasandcouchescom33753.articlesblogger.com/52871874/a-complete-guide-to-sectional-u-shape-dos-and-don-ts