Coastal dunes are landforms of sand, shaped by the wind in coastal
areas. For a coastal dune to form, three things are needed: 1) available
sand, 2) winds of sufficient strength to move the sand, and 3) vegetation
(or another obstacle) that causes the sand to pile up.
The east shore of Lake
Michigan is a great location for dune formation because there are
large amounts of sand available along the coast, there are strong
westerly winds to move the sand inland from the beaches, and the
moist climate supports the vegetation that starts dune growth.
Wind, sand and vegetation create the foredune.
(Hoffmaster State Park in August 2005.)