COASTS

• Why is sediment deposited in coastal area?


  When the water slows down and doesn’t have enough energy to carry sediment. So drops it.
• Longshore drift


  The movement of material along the shore by wave action.

  Suspension

  small particles such as slits and clay are suspended in the flow of the water.
• Attrition


  When rock and stones are carried by waves hit and knock against each other wearing them down.
• Abrasion


  When rocks and other materials carried by the sea are picked up by strong waves and thrown against coastline causing more to be broken off and carried away
• Hydraulic power 


  Sheer force of the water crashing against the coastline causing materials to be dislodged and carried away by the sea.
• Mass movement sliding 


  A slide occurs when a proportion of the rock suddenly gives way and moves downhill, usually aided by heavy rainfall.
• mass movement rockfall


  Bits of rockfall of the cliff face usually due to freeze-thaw weathering
• Mass movement slumping 


  Downward movement of materials when waves erode the base of the cliff creating a wave-cut notch causing the top of the cliff to slip and cause it to slump.
• Chemical weathering


  Acid rain
• Mechanical weathering 


  Process that causes rock to crumble