how can you determine if a mountain valley has been created by a glacier
U-shaped valley U-shaped valleys, trough valleys or glacial troughs, are formed by the process of glaciation. They are characteristic of mountain glaciation in particular.[1] They have a characteristic U shape, with steep, straight sides and a flat bottom. Glaciated valleys are formed when a glacier travels across and down a slope, carving the valley by the action of scouring.[2] When the ice recedes or thaws, the valley remains, often littered with small boulders that were transported within the ice, called glacial till or glacial erratic.
Mount Jackson (Montana) Mount Jackson (10,052 feet (3,064Â m)) is located in the Lewis Range, Glacier National Park in the U.S. state of Montana.[3] Mount Jackson is the fourth tallest mountain in Glacier National Park and it is situated on the Continental Divide. Both the mountain and its namesake Jackson Glacier are easily seen from the Going-to-the-Sun Road. On the southern flanks of Mount Jackson is Harrison Glacier, the largest remaining glacier in the park.[1] Route Descriptions can be found on Summitpost or in "A Climbers Guide to Glacier National Park.