transportation

• What are the four stages of transportation?

  Traction, saltation, suspension and solution.
• Describe the 'traction' stage of transportation.

  Large items of sediment roll along the seabed.
• Describe the 'saltation' stage of transportation.

  Smaller items of sediment bounce along the seabed.
• Describe the 'suspension' stage of transportation.

  Finer material is light enough to be carried by the water.
• Describe the 'solution' stage of transportation.

  Minerals dissolve in the water.
• What is longshore drift?

  Longshore drift is a process that gradually moves beach material along the coast. The action of swash and backwash results in a zigzag movement of material.
• Describe the process of longshore drift.

  1. First position of material.

  2. Swash carries material up the beach.

  3. Backwash carries material down the beach due to gravity.

  4. Second position of the material.

  5. Backwash always moves at a 90° angle.

  6. Third position of material.