|
The formation of a large cornice is favored by a windward slope which is 15-30° and a leeward slope of about 52°. Cornices can be formed, however, with windward slopes from level to about 45°, and with lee slopes from perpendicular to 30° or less. Cornices are often unstable, their collapse the frequent cause of avalanches. The snow cushion in itself is frequently an avalanche hazard. Where possible, routes should be so planned that cornices are avoided. Moreover, skiers should bear in mind that a flat and innocent-looking ridge crest may in reality be a cornice that is overhanging several feet and is on the verge of collapse. |
|||
|
