Unformatted text preview: basal sliding of temperate (wet-based) glaciers includes regelation (melt and refreezing) around small obstacles and enhanced creep (local increase in stress and flow rate) around larger obstacles variations in velocity • high velocity in thickest ice, i.e. in the middle of the glacier and near the equilibrium line • extending flow o acceleration with increasing slope or thickness o flow lines are directed towards the bed promoting erosion o causes crevasses and, on steep slopes, ice falls • compressive flow o deceleration with decreasing slope or thickness ( e.g. the terminus) <li>flow lines are directed upward, carrying debris to the ice surface </li...
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- Fall '10