Cryoplanation (or Cryoplanation Terraces) is the alteration of a terrestrial surface by intense frost action that effectively reduces slope steepness and lowers mountain and hill peaks. The term cryoplanation was introduced by Kirk Bryan in 1946 and it is a type of frost weathering that often modifies the landscape into terraces. These terraces ar... Found on http://en.wikipedia.org/wiki/Cryoplanation