Coasts- Depositional Landforms/ Formation Of A Spit

Question 1

Longshore drift

Answer 1

• The movement of sediment along the coastline
• (Waves break at an angles to the beach, swash runs up to the beach at an angle but backwash flows straight back which moves pebbles in a zigzag direction )

Question 2

Explain the process of the formation of a spit.

Answer 2

• Longshore drift continues but if the coastline changes or there is a river estuary it still continues which leads to the growth of a finger of land called a spit
• Lagoons of still, calm water and salt marshes establish themselves in the waters

Question 3

Describe the process of the formation of a bar.

Answer 3

• If a spit continues to grow all the way across a bay it forms a bar

Question 4

Explain the process of the formation of a tombolo.

Answer 4

• If a spit continues to grow until it joins an island it forms a tombolo