Mountaineering Routes : Page 308

der). On its surface will be the sand and rock debris that has avalanched from the mountains (lateral moraines at the sides, medial moraines down the middle, formed of lateral moraines where two glaciers join), and which is piled up where melting equals the flow, at the end of the glacier (terminal moraine at the terminus or snout). Also on the surface is the surface-drainage system, consisting of ice marshes, of small lakes in pinched crevasses, streams and waterfalls that finally disappear in crevasses or glacier mills (moulins), to join the main stream that flows beneath the glacier or subsidiary streams along the sides. Where the glacier flows past cliffs the edge will be melted back (the moat, or randkluft). But the ski mountaineer ascending a mountain will meet these features in reverse order. Certain considerations should be given each: