Rotational and Translational Landslides

  
Rotational and translational landslides are movements above one or more failure surfaces (Abbott 2004).  They display many behaviors styles, including long-term creep, catastrophic movement that is preceded by long-term creep and sudden catastrophic movement with no creep phase (Petley, 2002).  
   

Rotational Landslides

Rotational landslide is the downward and outward movement of a mass on top of  a concave upward failure surface (Abbott 2004).

Rotational slide shows the concave surface which the movement occurs.
Source: Hatfield

 

  
   
   

Translational Landslides

Translational landslide is a mass that slides downward and outward on top of an inclined planar surface (Abbott 2004). 

Notice the flatter surface that the moving material slides on. Material will accumulate at the toe of the landslide. And probably slide into homes.


Source: Arizona State

  
 

 

 

  

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