1. Types of Weathering
© Copyright   M. J. Krech. All rights reserved.

2. Mechanical Weathering

3. Water Action: Drying, Freezing & Thawing

6. Abrasion

7. Wind Abrasion

8. Water Abrasion

9. Organic Activity: Root Pry/Growth of Plants

12. Animal Actions:

14. Release of Pressure

16. Chemical Weathering: rocks breaks down as a result of chemical reactions, the rock chemically becomes something different

17. Water - hydrogen & oxygen combine with rock and turns it into a new substance

18. Feldspar +Water = Clay
Feldspar
A Clay Cliff

19. Plant Acids: dissolves rocks

21. Acid Precipitation

22. Photo taken 100 years ago
Photo taken recently

23. Both of these are Civil War headstones.
Why has one weathered more?
1865
1862

24. Oxidation; a chemical reaction in which a substance combines with oxygen to form a different substance

26. Carbonation – when carbon dioxide reacts with rocks forming a substance easily carried away by water

27. Example: carbonization of limestone results in karst.

29. Karst Topography

30. The End
© Copyright   M. J. Krech. All rights reserved.