Glaciers

1
Glaciers Erosion
2

• Glaciers What are they?
• very powerful agent of erosion
• mass of moving ice
• How are glaciers formed?
• when snow and ice accumulate to a great enough
  thickness and move down slope due to gravity.

3

• Types of Glaciers
• Alpine Glacier- formed in mountainous regions.
• Continental Glaciers- covers large land areas.
  (Greenland Antarctica)

4
(No Transcript)
5

• Norris Taku Glaciers, Tongass National Forest,
  Alaska.

6
(No Transcript)
7

• How do glaciers move?
• on average, glaciers only move approx. 100 meters
  per yearsome more, some less.
• Basal Slip
• Internal Plastic Flow

8

• Glacial Features and Landforms
• crevasses
• icebergs
• cirque
• arêtes
• horn
• hanging valley

9
(No Transcript)
10
(No Transcript)
11
(No Transcript)
12

• Canol Mountain Cirque Glacier

13

• Hanging Valley National Park
• New Zealand

14

• Glacial Features Left From Deposition
• erratics
• moraines
• kettles
• great lakes
• salt lakes
• fjords

15
(No Transcript)
16

• Erratic from a glacial ice sheet, Canada.

17

• Fjord- formed from glacier filling up with sea
  water.

18
(No Transcript)