1. YehliuTaiwan-HoneycombWeathering
Weathering The process of breaking down of rocks into smaller and smaller pieces of rock. These small pieces are known as sediment. Sediment breaks down further and becomes soil.
YehliuTaiwan-HoneycombWeathering
180px-GeologicalExfoliationOfGraniteRock

2. Types of Weathering Mechanical/ Physical Weathering
Chemical Weathering

3. Mechanical / Physical Weathering-
the process of rocks breaking apart without changing their chemical composition

4. Types of Mechanical Weathering
Ice Wedging- Water in the cracks of rocks freeze
Abrasion- Particles of sand are carried by the wind and water
Plant Action – roots from plants grow in the cracks of rocks
Release pressure – when pressure is removed from rocks

5. Chemical Weathering
The process in which the chemical makeup of a rock is changed by a chemical reaction.

6. Types of Chemical Weathering
Oxidation – a chemical change that occurs when oxygen and iron form.
Acids – natural acids break down rock.

7. Erosion
Erosion takes rocks and other particles from one location and puts them in another.
Weathering is breaking up rocks erosion is carrying them away.

8. The Agents of Erosion
Wind
Water
Glaciers
Gravity / Mass Movement

9. Wind Erosion
Wind can carry sand, silt, and clay from one place and deposit the sediments in another location.
This type of erosion is most frequent in dry areas with little or no vegetation.

10. Wind Erosion

11. Water Erosion The most important agent of erosion is running water.
Water runs down hill and forms a gully by taking away sediment.
Water continues to flow in the gully and eventually forms a valley.
Water can cause erosion of the shore line from waves in the ocean.

12. Water Erosion

13. Water Erosion

14. Glaciers Erosion
Glacier Erosion is sometimes referred to as Ice Erosion
Glaciers move slowly across land picking up large rocks and even larger boulders.
Glaciers can cause deep valleys to form as they move across the land.

15. Glaciers Erosion

16. Gravity/Mass Movement Erosion
Gravity is the force behind Water and Glacier Erosion
Gravity alone can cause Erosion

17. Gravity/Mass Movement Erosion

18. Types of Gravity/Mass Movement Erosion
Slump
Creep
Rockfalls
Rockslides
Mudflows
Landslides

19. Slump
A slump occurs when a small mass of land slips and moves down a slope.
A slump occurs when the slope becomes too steep and the material underneath can not support the ground above.

20. Creep Sediment slowly moves down hill.
Leaning trees and fence post are clues that creeping is occurring

22. Rockfalls
Occur when parts of a rock break off a tumble through the air.

23. Rockslides Large and small rock slide down a slope.

24. Mudflows Happen after heavy rains.
More likely to occur when there is a lack of vegetation.
Gravity pulls on the heavy water saturated sediment and causes it to flow down hill.

25. Landslides A large movement of land down a slope.

26. Deposition
Process by which sediments, soil and rocks are added to a landform or land mass (the end of erosion).