1. Weathering and Erosion

2. Weathering: break-up of rox
from exposure to atmosphere
• A)mechanical: break into
smaller pieces w/o changing
composition
–frost action
–plant growth
–abrasion (rubbing)

3. Frost Action

4. Plant Growth

7. B) Chemical weathering: rock
changes into a different substance
• Hydrolysis: rock reacts
w/water
–mica clay
• Oxidation:reacts w/oxygen
–-rust
• carbonation: reacts w/carbon
dioxide

8. Oxidation

9. Carbonation

10. Carbonation: Acid Rain

11. Karst Topography

12. Karst Topography
• Occurs in limestone bedrock
• limestone easily weathers
chemically (carbonation) by
weak acids in groundwater
• landforms created:
–caverns
–sinkholes
–disappearing rivers

13. Cavern

14. Stalactites
Stalagmites

15. Sinkholes

17. Weathering is a slow process
• Fastest when
–warm, wet climate
–big temperature changes
–steep slopes
–little vegetation

18. Erosion: movement of
weathered material
• Gravity
• ice
• water
• wind

19. Gravity: Landslide

20. Gravity: Talus

21. Water Erosion

23. Water Erosion

24. Wind Erosion

25. Deposition: