1. Mass Wasting The movement of material downhill

2. repose Angle of repose The angle at which material will begin to move downhill. For soils, this angle will change (i.e. decrease) when wet.

3. Types of Mass Wasting

4. Creep

5. Creep Examples

6. Creep Trees

7. Earthflow Soil saturated with water. Similar to creep.

8. Slump

9. Slump Photo

10. Debris Flow

11. Rock Fall

12. I-40 Landslide

13. San Jose, CA This pair of images illustrates the rapid growth that occurred between 1973 and 1999 in San Jose, CA. From 1970 to 1996, the population of the city of San Jose increased from 459,000 to 839,000. This is reflected by an increase in urban areas in the above Landsat images, which show up as light blue.

15. Arctic Map Permafrost: Permanently frozen soil in polar regions

16. Solifluction Only upper frost layer thaws, lower layers remain frozen. Water is trapped on frozen layer.

17. Putting it all together Mechanical weatheringChemical weathering Rock fall Rock slide Talus Coarse materialFine material Creep Debris flows Stream transport -> Beach sand & sedimentation on continental shelf Fall Line