Beach in Halkidiki Peninsula, Greece
A beach ridge is a elevated ridge along the beach that consists of sand or other beach material. It is generally straight and parallel with the shoreline.
Wave action can form a ridge near the upper reach of wave movement, waves deposit sand and other material at this height. When the water level drops, a ridge often remains. More than one ridge may be formed, taking place at different times. Tides and wave height determine the height of beach ridge formation.
Any body of water can form a beach ridge if waves are present and moving toward the shoreline.
A beach ridge can be a few inches high or rise to several feet or more, depending on the beach material and the size of the waves during formation.
Behind one beach ridge, there may be a higher ridge running parallel to the first, formed when wave height was higher. A depression called a runnel is often found between two ridges. Sand blown by the wind can sometimes fill a runnel when the water level is low to give the beach a smooth form.
If the water level drops permanently, or there is an uplift of the land, a beach ridge can become a more permanent form. Plant growth can help to protect the ridge from erosion. On some storm swept coasts, these formations can be large.
A elevated formation of sand or other beach material running parallel to the shoreline
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