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2006-10-15 12:07:46 · 2 answers · asked by ckielblock18 1 in Science & Mathematics Biology

2 answers

Shell deposition tends to alter coastlines in two ways.

First of all, a mound of shells can serve to lessen the force of incoming waves. And obviously if the waves are less strong when they reach the actual shore, they will not go as far up it and will have a lessened ability to erode.

The second affect arises when the water is moving in the other direction. Silt-laden water flowing out to the sea is stopped by the other side of the mound, causing it to deposit silt there instead of further out. In this way shells can cause the shoreline to actually build up instead of wearing away!

Because their main action is against waves, the force of the waves tend to shape the dikes formed by shells. Instead of forming lines parallel to the coast, they form lines parallel to the waves. So not only do these shells alter the erosion pattern locally, they have a pronounced tendancy to produce coastline in a different direction than it was going before!

Hope that helps!

2006-10-17 09:42:07 · answer #1 · answered by Doctor Why 7 · 0 0

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2016-11-23 13:30:43 · answer #2 · answered by Anonymous · 0 0

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