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The term is also used for collapse of rock from roof or walls of mine or quarry workings. A rockfall is "a fragment of rock (a block) detached by sliding, toppling, or falling, that falls along a vertical or sub-vertical cliff, proceeds down slope by bouncing and flying along ballistic trajectories or by rolling on talus or debris slopes". [2]
The North Face of North Twin Peak, Rocky Mountains, Alberta, Canada, 1,200 m; The west face of Notch Peak in the House Range of southwestern Utah, U.S.; a carbonate rock pure vertical drop of about 670 m (2,200 ft), with 4,450 feet (1,356 m) from the top of the cliff to valley floor (bottom of the canyon below the notch)
The first requirement for a rock relief is a suitable face of stone; a near-vertical cliff minimizes the work required, otherwise a sloping rock face is often cut back to give a vertical area to carve. Most of the ancient Near East was well supplied with hills and mountains offering many cliff faces.
1. A mountain or hill; a cliff face or precipice. 2. Another name for a bergschrund, iceberg, or inselberg. bergschrund. Also rimaye or simply berg or schrund. A crevasse or series of parallel crevasses that opens in a glacier when a mass of moving ice detaches and pulls away from stagnant ice or firn.
The Old Man of the Mountain, also called the Great Stone Face and the Profile, [1] [2] was a series of five granite cliff ledges on Cannon Mountain in Franconia, New Hampshire, United States, that appeared to be the jagged profile of a human face when viewed from the north.
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A A-grade Also aid climbing grade. The technical difficulty grading system for aid climbing (both for "original" and an adapted version for "new wave"), which goes: A0, A1, A2, A3, A4, A5 and up to A6 (for "new wave"). See C-grade. Abalakov thread Abalakov thread Also V-thread. A type of anchor used in abseiling especially in winter and in ice climbing. ABD Also assisted braking device. A term ...
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