Coastal Erosion and the City Under the Sea

Coastal Erosion and the City Under the Sea

As sand, soil or rock is eroded (worn away) from one place it has to end up somewhere else! When it settles we call this Sediment - which is taken by the action of wind, water, or ice, and/or by the force of gravity to a new place.

You can see this at the coast. Sand is sometimes washed off the beach so a sandy beach becomes stony, and that sand is washed somewhere else. On some beaches it settles just out to sea, to form a sandbank. Coastlines can change quite dramatically over a period of time as this coastal erosion occurs.

The BBC Bitesize website explains this well, but it's in the Key Stage 3 section (but then all Dorothy's readers are pretty smart, right?) but this little diagram explains the process well. I've changed the information so you can understand what happens.

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