Eolian erosion, transportation,
and deposition
A - Stong winds erode
sand and silt from a source area and transport them to new area.
As the wind velocity decreases the sand accumulates first (closest
to the source) and the silt(loess) is carried further downwind.
B- Hypothetical cross
section through a sand dune. Wind erodes and transports sand up
the stoss side (upwind side) of the dune. Sand rolls down the
slip face, forming the lee slope (downwind side) of the dune.
This continuing process of wind erosion and transportation of
sand on the stoss side of the dune, and simultaneous deposition
of sand on the slip face of hte dune results in net downwind migration
of the dune.
(from Busch 1992)
