What are Spits and how are they formed?

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Presentation transcript:

What are Spits and how are they formed? Outcomes: Describe the characteristics of a Spit Explain how Longshore Drift creates them

THE FORMATION OF SPITS Swash Backwash Prevailing Wind Direction LONGSHORE DRIFT Swash Backwash SAND THE FORMATION OF SPITS SEA SALT MARSH SPIT Prevailing Wind Direction ESTUARY RECURVE

When sand/sediment being carried in the waves is dropped/dumped (deposited)

Spits A Spit is a long, narrow stretch of pebbles and sand which is attached to the land at one end with the other end extending into the sea

Longshore Drift occurs along a coastline If the coastline ends/changes direction, the sea continues to deposit the transported material. Over time, the material builds up to form a ridge of shingle and sand. Changing wind directions may curve the end of the spit – spit shapes are always changing A salt marsh will sometimes form behind the spit where there is slow nearly stagnant water.