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Crevasse A crevasse is a deep crack, or fracture, found in an ice sheet or glacier, as opposed to a crevice that forms in rock. 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 stress causes a breakage along the faces. 
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Crevice (noun) A narrow crack or fissure, as in a rock or wall. 
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Crevice (verb) To crack; to flaw. 
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Crevasse (noun) A crack or fissure in a glacier or snowfield; a chasm. 
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Crevasse (noun) A breach in a canal or river bank. 
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Crevasse (noun) A discontinuity or “gap” between the accounted variables and an observed outcome. 
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Crevasse (verb) To form crevasses. 
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Crevasse (verb) To fissure with crevasses. 
