Alpha Channel: No, Looped Video: No, Frame Rate: 30, Resolution: 3840x2160, Video Encoding: H.264, File Size: 156mb, Number of Clips: 1, Total Clip(s) Length: 0:20, Source Audio: No, Color: Full Color, Setting: Outdoors, Pace: Real Time, Composition: Wide Shot, Movement: Aerial, Drone

U-shaped valleys, trough valleys or glacial troughs, are formed by the process of glaciation. They are characteristic of mountain glaciation in particular. They have a characteristic U shape, with steep, straight sides and a flat or rounded bottom (by contrast, valleys carved by rivers tend to be V-shaped in cross-section). Glaciated valleys are formed when a glacier travels across and down a slope, carving the valley by the action of scouring. Geography, geographic. 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. Gully moraine. High altitude mountain river stream meadow grassland tundra arctic alpine. Aerial footage with drone. 4K UHD 3840×2160 30p.