Other
National Resources Canada: Landslides and Snow Avalanches
Defines a landslide, avalanche, and a rockslide and provides examples. Describes the causes and effects of these events.
US Geological Survey
Usgs: Rockslide Debris Avalanche of May 18, 1980
Provides information on the rockslide that occurred at Mount St. Helens on May 18, 1980. Site is in outline form.
Curated OER
Merriam Webster: Visual Dictionary Online: Types of Landslides
Labeled diagram of types of landslides.