Geography River erosion

Geography River erosion

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  • The Rock Cycle By James Marson
  • First our rock gets washed into a river by either the tide rising or it being blown by the wind.
  • Next, whilst in the water, our rock gets broken down by the movement of water against it and other rock particles being bumped into it by the flow of the water. These processes are called Hydrolic action and Attrition.
  • If the water our rock is in  water with hazardous chemicals in it then corrosion can take place. This is where Corrosive substances like strong acids or alkalis can eat away at a rock to make it smaller.
  • if there are turns in the river or it does not have very much power, then the banks of the river can get worn away by the movement of rocks in the water scraping along the edges, this process is called abrasion. This can make the river wider and deeper and can wear down the rocks as well.
  • The sediment from all of these processes is then deposited in the sea or along the coast where a lot of things can take place. Long shaw drift being one where sediment is carried along the beach depending on which way the wind is blowing.
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