Why+do+most+ocean+coasts+have+sand,+where+does+it+come+from?


 * __WHY DO MOST OCEAN COASTS HAVE SAND, WHERE DOES IT COME FROM?__**

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The sand on the beach wasn’t always their it came from erosion. The water broke down mountains, cliffs and other rock forms allowing the sediments of the rock to be eroded and brought to the beach. When new sand is found on the beach this is from rain-washing sediments into the ocean, when this happens the sediments are washed onto the beach creating new sand. Sand also comes from rain pouring down on rocks which makes the rock break down and washed into the ocean. The waves push the small shards of rock onto the shore which creature more sand.

The amount of new sand on a beach has greatly reduced in the last 50 years year due to human activity. This is because we have restricted the flow of water so that new sand cannot be brought onto the beach.

By Joelle

http://matilija-coalition.org/point/growing/sand.html

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