### triumph:

Landslide
* All landslides move downslope under the influence of gravity.
* Many landslides are the aftereffects of volcanoes or earthquakes
  - occur where tightlines and drain pipes fail
  - transform after they detach
* Most landslide affects life.
* Most landslide occurs in prehistoric time
* Some landslide is caused by earthquakes
  - leads to tsunamis
* Some landslide occurs during intense storms
* Some landslides are large enough to create lakes by damming up rivers
  - can block bridges and create a flood at the same time
* also impact on the quality of Canada's resources.
* are a common occurrence during the rnonsoon
  - dramatic manifestation of the collision between humans and other natural forces
  - geologic hazard that occasionally occurs in Kansas
  - serious geologic hazard common to almost every state in the United States
  - widespread hazard, affecting the entire country
  - also a serious problem in both earthquake and flood zones
  - another type of ground failure that are often highly destructive
* are common along highways built on steep hillsides
  - following earthquakes in California
  - in the rainy season making for slow travel
  - on the steep walls of Cold Canyon
  - dangerous and unpredictable
  - dangerous, unpredictable, and can occur rapidly
  - downslope movement, under gravity, of masses of soil and rock material
  - dramatic examples of gravity erosion
  - known also as landslips, slumps or slope failure
* are more widespread than any geological event
  - other geological event
  - most likely during or shortly after downpours
  - much more likely to occur when the slopes are saturated by water
  - natural occurring phenomena
  - very common indeed in the Lower Himalayas
* associated with clearcuts or roads usually lack large wood, but are rich in sediments
  - human land uses are the primary source of sediment
* can be destructive
  - large and dangerous
  - cerate large crevasses and reroute streams and rivers causing flash floods
  - create large waves on lakes or embayments and can be deadly
  - destroy mountainsides and suddenly unleash a volcano's fury
  - devastate roads, posing great danger to passing vehicles
  - kill
* can occur as flows, slides, or falls and topples
  - in underwater, called a submarine landslide , coastal and onshore environments
  - weeks or months after intense storms
  - range in size from tiny to the size of subdivisions
  - vary in size but usually they always involve a large ground movement
* cause fatalities and billions of dollars in property damage each year.
* caused by heavy rain frequently disrupt train services.
* causes damage.
* come in many forms.
* commonly occur with other major natural disasters, such as earthquakes and floods.
* continue to be triggered by aftershocks.
* differ in their type, speed, extent, and destructiveness.
* happen when a saturated mass of soil moves down a steep slope
  - large amounts of rock suddenly fall down a cliff or mountainside
* has causes.
* help widen the troughs as the glaciers remove the bedrock support on upper slopes.
* is natural hazards
  - victories
* make agriculture and construction hazardous and often destroy roads.
* occur frequently after rains, sending red clay into the sea
  - in every state
  - often, sometimes blocking the roads for hours
* occur when a mass of soil moves down the slope under the force of gravity
  - gravity overcomes the force of friction
  - masses of rock, earth or debris move down a slope
* occur when the shearing of forces exceed the resisting forces of earth materials
  - slope changes from a stable to an unstable condition
  - where they have before, and in identifiable hazard locations
* often have devastating effects on humans.
* represent the mass movement of rock and soil material downslope due to gravity.
* triggered by earthquakes often cause more destruction than the earthquakes themselves.
* usually occur with another natural hazard, such as an earthquake or flooding.
+ Earthquake: Plate tectonics
  * When the earth moves offshore in the ocean, it can cause a tsunami. This can cause just as much death and destruction as an earthquake. Landslides can happen, too. This is an important part of the Earth's cycle.
+ Erosion, Erosion by gravity
  * Gravity erosion is the simplest kind of erosion. Gravity simply pulls loose earth materials downhill. Landslides are dramatic examples of gravity erosion.