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;
Snow Mountain (Franklin County, Maine) side of Snow Mountain drains into Big Island Pond, then into the Kennebago River, and the Androscoggin River, which drains into Merrymeeting Bay, the estuary of the Kennebec River. Snow Mountain (Franklin County, Maine) Snow Mountain is a mountain located in Franklin County, Maine, about from the Canada–United States border. Snow Mtn. is flanked to the northeast by Bag Pond Mountain, and to the southeast by Round Mountain. The north side of Snow Mountain drains into Indian Stream, then into Chain of Ponds, the North Branch of the Dead River, Flagstaff Lake, the Dead River, the Kennebec River, and into