Glaciers/Ice Sheets

• Plucking


  Water freezes in cracks in rocks below the ice. As glacial Ice moves, material around the ice is pulled out
• Abrasion


  Rocks embedded in the base of the ice scour and erode the bedrock as the ice moves downhill due to gravity
• U-Shaped Valleys


  Glaciers Widen, deepen and straighten the course of pre-existing river valleys
• Rouche Mountonees


  Smooth sides due to high pressure

  Downsteam side more angular