what type of valleys do glaciers form v shaped or u shaped
Truncated (cut off) ridges and hanging valleys form when small valley glaciers merge with a single large valley glacier. Valley glaciers erode V-shaped stream valleys into much more rounded or U-shaped valleys. Sometimes a small lake called a tarn will form at the bottom of the cirque. There are three tarns in a small area of Cumbria, UK, on the geological map below, they are the black shapes.
Glaciers and running water sculpt the land in different ways. While streams tend to cut winding curves and V-shaped valleys, glaciers carve nearly straight valleys with U-shaped cross-sections. The imposing, sheer rock walls of glacial troughs (U-shaped valleys) are among the most fundamental and distinctive features of glaciated landscapes.
V shaped valleys are valleys formed by rivers, they have a V-shaped cross-section and very steep sides. These valleys are usually found near the source of a river due to the presence of a steeper bank, however, they can also be formed downstream. V-shaped valleys are formed by erosion.