Formation Of Spits

Question 1

What is a spit?

Answer 1

Stretch of sand or shingle extending from mainland out to sea

Question 2

Give a brief description of the formation of a spit

Answer 2

1. Beach material transported by longshore drift in direction of prevailing wind
2. At a change in direction of coastline transportation continues
3. Short term change in wind direction
4. Deposition of larger, heavier storm material occurs
5. Further deposition occurs extending spit into estuary
6. Change in prevailing wind direction and waves cause the spit to curve
7. Spit stopped from depositing further material as river outlet washes it away; due to flow from estuary greater than that of drift
8. Salt marsh develops behind spit
9. Vegetation helps stabilise landform

Question 3

Give an example of a spit

Answer 3

Exmouth, Devon

Question 4

What is a tombolo?

Answer 4

Connects spit to an offshore island e.g. Chesil Beach

Question 5

Give a brief description of Chesil Beach

Answer 5

15km long - Connects Isle of Portland to south of Weymouth