Crevasses can form in several different ways. Transverse crevasses are transverse to flow and form where steeper slopes cause a glacier to accelerate. Longitudinal crevasses form semi-parallel to flow where a glacier expands laterally. <answer>Marginal crevasses</answer> form from the edge of the glacier, due to the reduction in speed caused by friction of the valley walls. <answer>Marginal crevasses</answer> are usually largely transverse to flow. Moving glacier ice can sometimes separate from stagnant ice above, forming a bergschrund. Bergschrunds resemble crevasses but are singular features at a glacier's margins.
Which crevasses form on the edge of the glacier?
Marginal crevasses