Search results
Results from the WOW.Com Content Network
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.
They can be up to 10 meters wide and are typically found on ice sheets and flat areas of a glacier in a region of transverse crevasses. Moulins can reach the bottom of the glacier, hundreds of meters deep, [3] [4] [5] or may only reach the depth of common crevasse formation (about 10–40 m) where the stream flows englacially. [6]
Crevasses make travel over glaciers hazardous, especially when they are hidden by fragile snow bridges. Below the equilibrium line, glacial meltwater is concentrated in stream channels. Meltwater can pool in proglacial lakes on top of a glacier or descend into the depths of a glacier via moulins .
Cross section of a cirque glacier showing the bergschrund A bergschrund—the long crack at the foot of the mountain slope—in the Ötztal Alps Open bergschrunds at Mont Dolent. A bergschrund (from the German for mountain cleft) is a crevasse that forms where moving glacier ice separates from the stagnant ice or firn above. [1]
Eyjafjallajokull glacier, which sits around 75 miles east of Reykjavik, is the second highest peak in Iceland and can be seen on most trips around the southwest of the country. The summit is 1 ...
When ice movement of a glacier is faster than elsewhere, because the glacier bed steepens or narrows, and the flow cannot be accommodated by plastic deformation, the ice fractures, forming crevasses. Where two fractures meet, seracs (or ice towers) can be formed. When the movement of the ice slows down, the crevasses can coalesce, resulting in ...
Matanuska Glacier is the state’s largest glacier accessible by road, ... They have crevasses, snow bridges and moulins. They're usually (in) pretty remote environments as well, so that that ...
Fox Glacier, New Zealand. 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 ...