Glaciers

• Glaciers?


  slow moving mass of ice
• Zone of accumulation?


  Snow is added
• Zone of ablation?


  Where snow is melted
• Abrasion?


  Rocks sticking out of the glacier shaping the land below it
• Plucking ?

  rocks are pullled from the glacier when it moves
• How is a U shaped valley formed?

  As glaciers go through the valley they widen the floor and walls

  This is caused by the weight of the glaciers (erosion)
• A corrie?

  A bowl shaped hollow in the land
• Arete ?


  a tall ridge seperating two side by side corries
• Striations?


  scartches in the earth left behide by melting glaciers
• Moraine?


  material left behide a moving glacier
• Drumlin?


  e-longated hills of glacial deposits
• Erractics?


  large rocks dropped of by glaciers
• Where are glaciers found?

  High altitude and high latitude area
• What is the percentage of earth covered in ice?

  10%
• Population of Alaska?

  731,000
• How many glaciers in alaska?

  27,000
• 3 steps of corrie being formed?

  Snow is gathered in small hallows forming a glacier

  Then the glacier moves down by gravity causing plucking to happen

  Erosion then continues then wides to create a bowl shaped hallow

  Due to freeze thaw weathing the glacier then breaks apart causing it to melt leaving a tarn lake behind
• How does a U-Shaped valley turn into a V-shaped ?


  Before ice age: u shaped valley

  During ice age : Valley is filled wtih ice and it widens the crack due to plucking and abrasion

  After ice age:ice is then melted