Aeolian Landform (11. Loess)

11.Loess                                                                                                                                                Back to Aeolian Landforms
  • Loess sediment formed by  wind-blown dust/silt and thundra condition.
  • color is yellowish or brown.
  • Ihey are 20–50 micrometre size range.
    Loess in Vicksburg, Mississippi, USA
    Loess in Vicksburg, Mississippi, USA
  • Loess cemented by Calcium carbonate.
  • It is product of past glacial activity (ice age).
  • The word Loess fist use in Rhine river valley1821.
  • It derived from german word for "loose".
  • These are called 
                      -Paha ridges in America
                     -Greda ridgesin Europe. 



  • Loess is ;
                     -Homogeneous
                     -Porous
                     -Friable
                     -Pale yellow
Loess near Hunyuan, Shanxi province, China.
Loess near Hunyuan, Shanxi province, China.
                     -Buff
                     -Slightly coherent
                     -Non stretified
                    -Often calcareous
  •  Loess grains are angular with;
                    -Little polishing
                    -Rounding
                    -Composed of crystals. 
  • Composed crystals are;
                    -Quartz
                    -Feldspar
                    -Mica
                   -Other minerals


  • Loess deposits  very thick <100m areas or  China & the Midwestern United States.
  • Loess often stands in either steep or vertical faces. 
  •  Loess will erode very readily.
  • Top soils of loess are discovered in the;
        -NorthWestern parts of United Ststes
        -Central Europe
        -Eastern Europe
        -Eastern China




loess




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