Because of its greater thickness, this hypothetical valley glacier will, in turn, flow more rapidly because thicker ice increases driving stresses at the glacier bed and raises basal temperatures 3, which increase the rate of ice deformation and basal sliding. ![]() A deep valley that is several kilometres in length will contain a thicker and longer ice mass than a small mountain cirque. The Alps mountains above Chamonix, France, not only rise to a high enough altitude that glaciers can exist there due to the cold conditions, but the very steep slopes running away from Mont Blanc (top left) dictate the form and flow of Glacier des Bossons (front) and Glacier de Tacconaz (behind).
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