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A beach is a geological landform along the shoreline of an ocean, sea. It usually consists of loose particles which are often composed of rock, such as sand, gravel, shingle, pebbles or cobblestones. The particles of which the beach is composed can sometimes instead primarily be of biological origins, such as whole or fragmentary mollusc shells or fragments of coralline algae.
Wild beaches are beaches which do not have lifeguards or trappings of modernity nearby, such as resorts and hotels. They are sometimes called undeclared, undeveloped or undiscovered beaches. Wild beaches can be valued for their untouched beauty and preserved nature. They are most commonly found in less developed areas including, for example, parts of Puerto Rico, Thailand and Indonesia.
Beaches often occur along coastal areas where wave or current action deposits and reworks sediments.