The geological name for a valley formed by glacial activity is a U-shaped valley. These valleys are created when glaciers erode the surrounding landscape, leaving behind steep sides and a flat bottom. U-shaped valleys are distinct from V-shaped valleys, which are typically formed by river erosion. The characteristics of U-shaped valleys provide insights into past glacial movements and climate conditions, helping geologists and researchers understand the Earth's geological history. Many famous U-shaped valleys can be found in glacial regions, such as those in the Alps and Yosemite National Park.