1. 5.3: Mass Movement
as rock weathers, it becomes very fine particles that form soil
mass movement: process where gravity causes rock and soil to move downhill
can be very fast or very slow

2. mass movement can be triggered by:
water
steep slopes
removal of vegetation
major earth events (earthquake, volcanic eruption)

3. rapid mass movements
rockfall: fall of rock from a steep cliff

4. rockslide (landslide): when masses of loose rock and soil suddenly fall downhill

5. slump: large block of soil and rock moves down a very steep slope in one piece

6. mudflow: large amounts of mud (no rock!) flow downhill

7. slow mass movements
earthflow: small area of vegetation-covered soil moves downhill when extremely wet

8. slump is a whole segment staying intact while earthflow has soil flowing downward in a slow mass

9. creep: extremely slow downhill movement of rock material