Coastal Deposition

Question 1

Depositional Landforms

Answer 1

1. Beach
2. Spit
3. Bar
4. Tombolo

Question 2

Beach

Answer 2

Beaches are a result of sediment being deposited in a formed, sheltered bay. This occurs when the waves no longer have the energy to transport eroded material along the coast, through longshore drift. Large material is deposited soon, as sand floats on the water. Overtime, these deposits build up, forming a beach.

Question 3

Draw the diagram of a beach

Answer 3

N/a

Question 4

Bar

Answer 4

Bars are a result of longshore drift pushing material along, creating spit joining up two headlands. This then forms a safe area, known as a lagoon, but can be eroded. It is usually formed at bays or natural hollows in the coastline.

Question 5

Draw a bar

Answer 5

N/a

Question 6

Spit

Answer 6

Spits are formed where the coastline changes direction, but longshore drift continues to deposit material along the beach. Overtime, this deposit increases / builds-up above sea level. This creates a hooked or curved sand spit or spit. This leaves a salt marsh behind it.

Question 7

Draw a spit.

Answer 7

N/a

Question 8

Tombolo

Answer 8

A tombolo is formed when a spit connects the mainland to an island. There are usually manmade structures connecting them (eg. highway).

Question 9

Draw a tombolo

Answer 9

N/a