U-shaped valley (IMAGE) Colorado State University Caption The North Crestone Creek drainage area is an example of the U-shaped valley typical of glacial erosion, as opposed to the V-shaped valleys made by rivers. CSU researchers modeled the extent of ancient glaciers in this basin for the study. Photo by Cece Hurtado Credit Cece Hurtado Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.