1. Chapter 15 Mass Wasting: The Work of Gravity

2. La Conchita, California

5. Landslide prone Coastal Community 35,000 ya 6,000 ya Numerous events in 1800’s 1995 2005 Solution Relocate residents

6. Mass Wasting Downslope movement of rock/soil Need slope Need gravity

7. Mass Wasting Natural occurrence Problematic when “we are in the way” Large scale events are rare Total effects of small events are huge 20-50 deaths in US annually $1-2 billion annually

8. Mass Wasting Does this happen on Long Island? North Shore or South Shore? Increasing or decreasing on Long Island?

9. Earthquake creates landslide, India - 2005

10. Rain causes mudflow & buries town Phillipines

12. Grand Canyon

16. Angle of Repose

17. Wildfires, California

20. Causes Removal of vegetation Vibration Increase slope Excess moisture

21. Prevention Remove excess moisture Provide vegetation Minimize slope Construct retaining wall

22. End of Chapter 15