The photo shows sand moving on a windy day in October 2001. The
lighter-colored dry sand which is moving is visible against the
darker color of wet beach sand.
A number of aeolian (wind)
processes are at work in this photo. Sand movement starts on the
beach where sand grains are picked up by the wind (entrainment)
and the surface lowers (erosion). The
sand is transported towards the foredune.
Sand is deposited in the foredune vegetation.
Sand moving from beach to foredune on a windy October day (2001)in
Hoffmaster State Park. The tower in the photo holds instruments
to measure wind. The view in the photo is looking south with Lake
Michigan to the right.