US Geological Survey
Usgs: Landslide Hazards Program
Discusses the problems associated with landslides, where they occur, and why they occur.
Idaho State University
Idaho State University: Landslides, Slope Failure, Other Mass Wasting Processes
Slope failure is the downslope movement of rock debris and soil in response to gravitational stresses. Three major types of mass wasting are classified by the type of downslope movement. The types of movement, falls, slides, and flows...