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

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Presentation on theme: "How do Glaciers change the earth’s surface? BY MRS. J."— Presentation transcript:

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

2 Overview GlaciersWeathering and Erosion Effects Deposition Effects

3 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

4 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

5 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

6 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

7 Conclusion GlaciersWeathering and Erosion Effects Deposition Effects

8 Final Thought

9 Images Cited  Diagram - %20Diagrams/Glaciers-Moraine.png %20Diagrams/Glaciers-Moraine.png  Glacier Diagram %20Diagrams/Glaciers-Moraine.png %20Diagrams/Glaciers-Moraine.png


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