1. Erosion the physical removal and transporting of rock material by natural agents such as water, wind or ice.

2. Erosion due to rivers during flood stage.

3. Farm fields and crops eroded due to poorly draining soil, or topography

4. Shoreline erosion due to wave action of water

5. Down-cutting of river has eroded the canyon

6. Wind erosion Wind-blown sand (silica) erodes softer rock (shale, limestone) leaving behind the more resistant sandstone

7. Glacial erosion Rock trapped in moving ice scrape and carve striations in bedrock.

8. Sec. 12.3 Mass Wasting And Erosion

9. Type of mass movement Amount of waterTime / speedCompositionCauses Creep Slump Earthflow Mudflow Lahar 12.3 Mass Movement (pg. 268-270)

10. Types of Mass Movement These are all types of Landslides!!!!! Creep: Slump: Earthflow: Mudflow:

11. Types of mass Wasting

12. Factors that Effect Landslides Water/rainfall Composition of the ground Amount of loose weathered material Triggers: Earthquakes Gravity/steepness of the slope Erosion (undercutting)

13. Rock slide

14. Rock slides: rock falls suddenly (without need for water), due to gravity

15. Talus: loose rock fragments that are pulled down by gravity and pile-up at the base steep slopes.

16. Creep

17. Soil creep

18. Soil Slump

19. A river bank that has “slumped”

20. Soil Slump

21. Debris flow / earth flow

22. The remains of the massive landslide are seen on Monday, March 24 2014. The landslide blocked the highway and the Stillaguamish River.

23. http://www.youtube.com/watch?v=dVSXm13jH1s

25. Mud flow

27. Mt. St. Helen volcanic ash lahar

28. Volcanic ash and water: Lahar

29. Sorting activity Amount of water /rainfall Rate / speed of movement