A U-Shaped Valley is formed by glacial erosion.
Glacial Erosion formed Yosemite Valley and the Sierra Nevada
A U-shaped valley, also known as a glacial trough, is a large valley with steep sides, and with a wide, flat valley floor. It is formed, as the alternative name suggests, by glacial activity in the area (i.e. it was formed by a glacier).
In cross-section: A 'U' shaped valley is formed from glacial erosion. A 'V' shaped valley is formed by river erosion.
A stream valley is usually 'V' shaped, formed by erosion from a stream. A glacial valley is usually 'U' shaped, formed by the action of a glacier.
Glacial erosion formed Yosemite Valley. Meanwhile, the streams eroded the granite rock to form the waterfalls we know as Yosemite Falls and many others today.
A 'U' shaped valley indicates glacial erosion.
As a part of the Himalayan Mountains, Lhotse Mountain was formed by the combination of the Indian and Eurasian plates. Between it, Everest, and Nuptse is a glacial valley that makes it jagged in terms of structure.
If it is inundated by the sea it is called a "Fjord", if not is just a glacial valley.
A glacier trough is also known as a U-shaped valley and is formed when a glacier passes through it. The glacier erodes the bottom of the valley through abrasion, and the sides of the valley through freeze-thaw weathering. It wears away the softer rock but when it gets to the harder, tougher rock it can't erode it to give the glacial trough its shape. Hope this helps!
Eskers
glacial till.