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Transverse crevasses, Chugach State Park, Alaska. A crevasse is a deep crack that forms in a glacier or ice sheet. Crevasses form as a result of the movement and resulting stress associated with the shear stress generated when two semi-rigid pieces above a plastic substrate have different rates of movement. The resulting intensity of the shear ...
A crevasse that forms on the upper portion of a glacier where the moving section pulls away from the headwall. beta Information on how to complete (or protect) a particular climbing route. See on-sight and flash. [1] [2] [3] beta break In sport climbing, a move on a climbing route other than the move originally intended by the route setter. In ...
Landsat image of Jacobshavn Isbræ. The lines show the position of the calving front of the Jakobshavn Isbræ since 1851. The date of this image is 2001, and the calving front of the glacier can be seen at the 2001 line. The area stretching from the calving front to the sea (towards the bottom left corner) is the Ilulissat icefjord.
A serac (/ s ɛ ˈ r æ k ˌ ˈ s ɛ r æ k /) (from Swiss French sérac) is a block or column of glacial ice, often formed by intersecting crevasses on a glacier. Commonly house-sized or larger, they are dangerous to mountaineers, since they may topple with little warning. Even when stabilized by persistent cold weather, they can be an ...
A crevasse may be as deep as 45 m (148 ft) and as wide as 20 m (66 ft). [11] A crevasse may be covered, but not necessarily filled, by a snow bridge made of the previous years' accumulation and snow drifts. The result is that crevasses are rendered invisible, and extremely dangerous to anyone attempting to traverse a glacier. [12]
A bergschrund is distinct from a randkluft, which is a crevasse with one side formed by rock. The randkluft arises in part from the melting of the ice due to the presence of the warmer rock face. [2] However, a randkluft is sometimes called a bergschrund. [3] The French word rimaye encompasses both randklufts
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These crevasse channels are essentially miniature distributary systems and can have many of the features that larger fluvial bodies possess, like levees. [4] A crevasse-splay sequence typically begins with an erosive base, followed by the deposition of coarse bed load sediment and transitioning to finer suspended sediment as energy decreases ...