1. http://www.dmme.virginia.gov/Dmr/DOCS/Hazard/Images/slidesgn.gif Mass Wasting “landslides”

2. http://landslides.usgs.gov/learningeducation/nationalmap/index.php Mass Wasting Risk Map

3. http://landslides.usgs.gov/learningeducation/nationalmap/images/ecentral.gif Landslide Incidence Low (less than 1.5% of area involved) Moderate (1.5%-15% of area involved) High (greater than 15% of area involved) Landslide Susceptibility/Incidence Moderate susceptibility/low incidence High susceptibility/low incidence High susceptibility/moderate incidence

4. Gravity and slope angle http://seis.natsci.csulb.edu/bperry/Mass%20Wasting/Introduction_to_Mass_Wasting.htm

5. Bedrock or foliation orientation with respect to slope

6. http://uregina.ca/~sauchyn/geog323/324.jpg Angle of repose and unconsolidated materials

7. http://classes.colgate.edu/rapril/geol101/massw/mass4.htm

8. Water content

9. http://www.dmme.virginia.gov/Dmr/DOCS/Hazard/Images/camille.gif Aftermath of a Nelson County debris flow that occurred during Hurricane Camille in 1969. Debris flows are a key process by which the landforms of the Virginia Blue Ridge have evolved over geologic time. A debris flow event can be expected to occur somewhere in the southern Appalachian Mountains on the order of once every 3 years.

10. http://www.geology.enr.state.nc.us/Geologic_hazards_Landslides_Hurricane_Frances_1/Landslides_Hurricane_Frances.htm

11. Unit contains abundant clay having high swelling potential Part of unit (generally less than 50%) consists of clay having high swelling potential Unit contains abundant clay having slight to moderate swelling potential Part of unit (generally less than 50%) consists of clay having slight to moderate swelling potential Unit contains little or no swelling clay Data insufficient to indicate clay content of unit and/or swelling potential of clay (Shown in westermost states only) Swelling clays with respect to slope (can contain water rich layers) http://www.surevoid.com/surevoid_web/soil_maps/intro1.html http://www.solids.bnl.gov/~dimasi/clays/index.html

12. http://www.gly.uga.edu/railsback/1121MassWstgFourplex2.jpeg

13. Creep http://seis.natsci.csulb.edu/bperry/Mass%20Wasting/Types_of_Mass_Wasting.htm http://gpc.edu/~pgore/myphotos/other/creep.jpg

14. Evidence of past mass wasting http://seis.natsci.csulb.edu/bperry/Mass%20Wasting/Types_of_Mass_Wasting.htm www.geology.com Landslide on Route 15 - Tioga County Pennsylvania http://landslides.usgs.gov/learningeducation/images/misc/Creep2.jpg

15. http://www.dilbecklawn.com/retention3.jpg http://www.toyogreen.com/slope%20vegetation%20system/images/Slope.jpg Engineering to reduce risk