Snow cornice Snow cornice A snow cornice or simply cornice (from the Italian cornice meaning "ledge") is an overhanging edge of snow on a ridge or the crest of a mountain and along the sides of gullies. They form by wind blowing snow over sharp terrain breaks (e.g. the crest of the mountain) where it attaches and builds out horizontally. This build-up is most common on the steeper and leeward sides of mountains. Cornices are extremely dangerous and travelling above or below them should be avoided. When a cornice "collapses", it breaks in from the cornice to the top of the peak;
Rushup Edge Rushup Edge Rushup Edge is a ridge in the Derbyshire Peak District of England. The ridge's highest point is Lord's Seat at , while Mam Tor lies at its eastern end, beyond which the Great Ridge runs. Lord's Seat is a round barrow. Rushup Edge is part of the ridge which extends east to Mam Tor, Hollins Cross, Back Tor and Lose Hill, separating the Edale and Hope valleys. The ridge is formed of Namurian (c320mya) age Mam Tor Beds (alternating sandstone and siltstone) and landslides on the north have formed colluvium. In October 2014, mountain bikers, walkers, horse riders,