1. Can you guess what this is?
Covers 10% of the land in the world
Crystals can be as large as baseballs
Have shelves that are over 80 km long
90% of it is below water.
Is blue!
Stores 75% of the fresh water in the world.
Makes up our present day soils.

2. Covers 10% of the land in the world
Presently 10% of all land is covered by glaciers.
Crystals can be as large as baseballs
Glacier ice crystals can be this size!!

3. Have shelves that are over 80 km long
Antartica’s glaciers have calve ice shelves that may be over 80 km long.

4. 90% of it is below
water.
90% of the iceberg is below water—what you see is only 10% above the water!!

5. Is Blue!!!
Glacial ice is white when there are many air bubbles, but ice is extremely compacted and dense, ice is blue.
Stores 75% of the fresh water in the world.
75% of the freshwater is frozen in the glaciers and is unavailable for our use.

6. Environmental Science
GLACIATION
Environmental Science

7. Earth’s Glaciers

8. Glaciers Cover 10% of Earth’s surface.
Majority of glacial ice is tied up in Anarctica and Greenland.
Also found in sub-polar and polar coastline mountain ranges in the world.

9. Glacial Formation
Glacier: an accumulation of snow that lasts for more than one year.
As snow accumulates, compresses layers below to form ice—takes thousands of years.

10. Glacial Formation Glaciers appear blue b/c they are so thick.
Glacial Bay Glacier

12. Schwarze Schneid mountain at the Soelden glacier.

13. Largest Glacier in world

14. Glaciers and Latitude

15. Glaciers in North America
Glaciers made most of the landforms we have in Illinois incl:
Glacial lakes
Kettle lakes
Till
Moraines

16. Glaciers began in northern Canada

17. Glacial Formation http://maps.howstuffworks.com/maps-of-greenland.htm
How the Great Lakes were formed:

18. Northern Illinois glaciers

19. Illinois Landscape Current landscape shaped by:
-Ice sheet was 1 mile thick
-Occurred 25,000-14,000 ya
-Ice (Laurentide period) covered much of Canada and northern US
-Formed Lake Michigan

20. Landforms created by glaciers from Canada
Continental glaciers
Invaded IL repeatedly
during the Ice Age.
Ice Age lasted 2.4
Mya to 10,000 ya.

21. Geologists believe that this what northern IL looked like

22. Ice Sheet Ice Sheet invasion From Canada flowed into NE
Illinois and Lake
Michigan.

23. Glaciation Climate and temperatures different during IL Ice Ages
Temperature at or near freezing
Precipitation in form of snow
Mastodons and Woolly Mammoths roamed the region.

24. Moraines Low rises of land caused By the invading and
Retreating ice during Ice
Ages.

25. Moraine Formation

26. Moraine animation

27. Till
Unsorted mixture of soil and debris form till (heavy sand & gravel outwash)

28. Kettle Lakes
Kettle lakes form when a block of buried ice left by the retreating glacier melts and forms a hole, sometimes quite deep.

29. Before Kettle Lake formed
Kettle lake to form here

30. Kettle lake forms

31. Bull Frog Lake is a kettle lake near Cook County Forest Preserve

32. Kames are:
Cone-shaped hills in areas of ground moraine. When the ice melts, the sediment filling these depressions is let down onto the land surface.

33. Eskers are:
elongated s-shaped or ridges in areas of ground moraine. When the glacier melts, the deposits that fill the tunnels are let down onto the surface as ridges.

34. Eskers & Kames