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. Marginal crevasses form from the edge of the glacier, due to the reduction in speed caused by friction of the valley walls. Marginal crevasses 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. COUNT 5
QSN1 Which crevasses form on the edge of the glacier? ANS1 Marginal crevasses QSN2 Why do marginal crevasses form on the edge of a glacier? ANS2 reduction in speed caused by friction of the valley walls QSN3 What do bergschrunds resemble? ANS3 crevasses QSN4 How are bergschrunds different than crevasses? ANS4 singular features at a glacier's margins QSN5 Where do transverse crevasses form? ANS5 where steeper slopes cause a glacier to accelerate