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What cause a beach to erode?

Updated: 8/10/2023
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Wiki User

10y ago

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It's a long process that is all based around erosion. There are three types of erosion, physical, mechanical and chemical:

-Physical erosion would be the waves crashing against cliffs.

-Mechanical erosion is a much more complex process. For instance, water fills a small crack. The water freezes and the crack expands. This can happen many times, leading to massive damage.

-Chemical erosion is the sort of stuff that acid rain does to limestone statues.

When the rocks get eroded a lot, they become smaller rocks. This is constantly repeated until, eventually, the rocks become sand. I could write more on the movement of sand, sandbanks, dredging etc. but that's probably covered elsewhere.

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16y ago
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11y ago

Beaches are built up during quiet weather and removed rapidly during storms. Most beaches are longer and wider in summer vs winter due to weather conditions. Also, damming rivers can cause beaches to shrink.

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11y ago

Well - the coastling is changed by erosion mainly but for it to be sustainable depostion must be involved too. However human impact can change the coastline aswell.

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13y ago

Again, erosion

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