1. Weathering
And
Erosion
Weathering
And
Erosion

2. The Different Types of Weathering The MAIN causes of erosion are;
Erosion occurs when rock is washed, blown, or carried away
Weathering occurs when rock is broken down but stays in one place.
The MAIN causes of erosion are;
Running water
Wind
Waves
Glaciers

3. Grand Canyon: Rock layers formed and then were worn away by running water.

4. In this picture the running water eroded rock, forming a canyon.

5. The ground has been washed away by water. That is erosion.

6. The water is creating erosion
The water is creating erosion. The water is breaking up the soil and carrying it away. What did the power of running water create in this picture?

7. Water erosion has taken this soil away and created gullies.

9. These rocks have been blasted by wind and sand causing them to become rounded.
WIND ABRASION

10. Over great time, weathering from wind and running water caused these formations.

11. Arches National Park was created when softer rocks weathered due to wind and rain and tough rocks on top were left behind forming huge arches and pillars. The sediment or rock bits we carried away leaving the empty space.

12. Wave Action ; when waves hit the rocks and pieces of rock break off
Wave Action ; when waves hit the rocks and pieces of rock break off. This is what causes shorelines to erode and creates beaches.

13. Weathering from waves and tides made this arch.
Can you make a hypothesis about what this coastline looked like millions of years ago? Can you predict what this coastline will look like in the future? Why?

14. Weathering cause by tides and waves on the coast line.

15. Erosion
The first five pictures of this presentation are of the same rock, just in different time periods. Pay attention to the dates on the side of the pictures and see what the water did to this rock.
1890
                                                                      

16. Erosion
Still the same rock.
1910
                                                                       

17. Erosion Still the same rock.
1920
                                                              

18. Erosion Still the same rock.
1970
                                                    

19. Erosion Still the same rock, but where did it go?
1990
                                                                

20. This glacier is carving out a U shaped valley between these mountains.

21. This is a picture of a glacier which carves out a U-shaped valley where it flows dragging rocks and boulders along the way.

22. Oxidation
Root Pry
Exfoliation
Frost Action (Freeze and Thaw)
Wind abrasion

23. This rock is red because of the oxidation of iron in the sediment when the rock was being formed.

24. Plant Roots

25. Root Pry

26. This is a picture of the Half Dome
This is a picture of the Half Dome. The rock is peeling away from the mountain in layers just like an onion. This is exfoliation.

27. Dome Exfoliation

28. Freeze and Thaw

29. Frost Action or freeze and thaw slowly breaks up this sedimentary rock into unusual shapes.

30. Weathering from wind, rain, and freeze and thaw made Bryce Canyon.