1. U-shaped valleys: Glaciers carve out valleys with a distinctive U-shape, as opposed to the V-shape created by rivers. The wide, flat valley floor and steep, almost vertical sides are hallmark features of glacial erosion.

2. Cirques: These bowl-shaped depressions are often found at the head of a glacial valley. They form as the glacier erodes the bedrock, creating a steep, amphitheater-like structure.

3. Moraines: These are ridges of rock debris (till) deposited by a glacier. Lateral moraines form along the sides of a glacier, medial moraines form in the middle where two glaciers merge, and terminal moraines mark the furthest point of glacial advance.

4. Fjords: These are long, narrow inlets of the sea formed by glacial erosion. Fjords often have steep sides and are deep, often exceeding the depth of the surrounding ocean. They are commonly found in coastal areas that were once glaciated.