Where wind conditions are correct, beaches can be backed by coastal dunes which offer protection and regeneration for the beach. Erosion and changing of beach geologies happens through natural processes, like wave action and extreme weather events. Though some beaches form on inland freshwater locations such as lakes and rivers, most beaches are in coastal areas where wave or current action deposits and reworks sediments. Sediments settle in different densities and structures, depending on the local wave action and weather, creating different textures, colors and gradients or layers of material. The particles composing a beach are typically made from rock, such as sand, gravel, shingle, pebbles, etc., or biological sources, such as mollusc shells or coralline algae. A summer tourism at the Yyteri Beach in Pori, Finland.Ī beach is a landform alongside a body of water which consists of loose particles.
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