Crevasse
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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 a
Transverse crevasses, Chugach State Park, Alaska
A crevasse in Tangra Mountains, Antarctica
A man crosses a crevasse in Easton Glacier, Mount Baker, in the North Cascades, Washington.
The glacier Taschachferner below the Wildspitze (left, 3.768 m) in Tyrolia in Austria in April 2005. There are some zones with large open crevasses, e.g., the spot-shaped area below the middle of the image and most right. The line marks the ascent track of mountaineers on skis which intentionally avoided these dangerous areas.
Serac
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A serac 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 and alpinists, since they may toppl
Crevasse
…intensity of the shear stress causes a breakage along the faces. Crevasses often have vertical or near-vertical walls, which can then melt and create seracs, arches, and other ice formations. These walls sometimes expose layers that represent the glacier's stratigraphy. Crevasse size often depends upon the…
Fox Glacier, New Zealand
Serac, Russell Glacier in Greenland
Seracs in firn at 3,050 metres (10,000 feet) on the Winthrop Glacier of Mount Rainier in Washington, USA
Seracs, Bossons Glacier, southeastern France