Ice

• plucking


  the tearing away of blocks of rock from the bedrock
• abrasion


  rock particles embedded in bottom of glacier sandpaper the bedrock.
• freeze-thaw weathering


  water seeps into cracks and joints then freeze and expand repeatedly to breakdown the rock

  
• transportation


  a glacier can carry material on its surface, within it and beneath it.
• Till


  Angular and unsorted material deposited by ice
• Moraine


  A mass of till often in the form of a long ridge.
• overload


  when the glacier's load has exceeded its carrying capacity because it is melting, usually when it reaches lower ground.
• terminal moraine


  found at the furthest point to which a glacier has travelled.

  
• lateral moraine


  till formed by frost-shattering that accumulates along the side of a glacier
• medial moraine


  where two glaciers have joined

  
• recessional moraine

  a ridge formed of till, that is behind and parallel to terminal moraine. It marks a temporary halt in the retreat of a glacier.

  
• carrying capacity


  the maximum load that a glacier can transport.
• snowline


  The altitude above which snow lies all year
• glacial outputs


  meltwater and evaporation

  
• glacial inputs


  precipitation and avalanches
• glacier


  a moving mass of ice confined in a valley

  
• Outwash


  sorted and rounded material (sand and gravel) deposited by meltwater streams in front of and underneath a glacier.

  
• bulldozing


  Ice pushes material of all shapes and sizes at its snout as it moves slowly forward

  
• drumlin

  a hill made of glacial till usually elongated in shape with the longer axis parallel to the former direction of the ice.

  
• corrie


  An armchair shaped hollow high in a mountainside, it can contain a small, circular lake.

  
• arete

  a knife-edge ridge formed between two corries

  
• pyramidal peak

  a steep mountain peak formed where 3 or more corries have cut back to back.

  
• glacial trough

  a deep and wide 'U' shaped valley due to the erosive action of a glacier
• truncated spur


  a cliff-like edge to a valley side as a former interlocking spur has been eroded away by a glacier