How do Glaciers change the earth’s surface?BY MRS. J

Overview

Glaciers Weathering and

Erosion Effects

Deposition Effects

Glaciers

Compressed snow layers Cold year-round: advance,

retreat Moved by gravity and pick

up sediment Ice mass moves slowly (1-2

in./day) Changed land surface over

many years

Weathering Effects

Weathering Rocks broken into smaller

pieces Ice crushes rocks into sediment Rocks grind other rocks

Effects Glacial Striations = long

scratches Glacial Polish = flatten and

shine rocks

Erosion Effects

Erosion Pluck rocks and pick up sediment Carry sediment downhill

Effects Horns = ice carves out sides of

peak Missing sediment = empty space U-Shaped valleys = half-pipe shape

Deposition Effects

Deposition Relocates sediment and

rocks

Effects Moraines = piles of rocks or

sediment Kettles: ice fills area and

melts Erratic: material different

from things around it

Conclusion

Glaciers Weathering and

Erosion Effects

Deposition Effects

Final Thought

Images Cited

Diagram - http://i724.photobucket.com/albums/ww245/MohsinShah11/Geography%20Diagrams/Glaciers-Moraine.png

Glacier Diagram http://i724.photobucket.com/albums/ww245/MohsinShah11/Geography%20Diagrams/Glaciers-Moraine.png