Review What’s going to happen to the ball? Why? Erosion features – Add a feature to the diagram on the board and explain it as you go.
To be able to define and describe different coastal depositional features .
To be able to explain how these coastal features have been created by deposition.
WHY? So next time you’re lying on a beach getting a tan, you’ll understand why you’re lying on sand rather than rocks!
Beach – Holderness, Yorkshire
A collected body of material (sand, shingle etc.) that has built up between the high and low tide mark.
Spit - Spurn Head, Humber Estuary
Spits are long narrow ridges of sand and shingle which project from the coastline into the sea.
Bar - Slapton Sands, Devon
A collected body of material (sand, shingle etc.) that connects two sides of a bay, joining two headlands.
Tombolo – Chesil Beach, Dorset
A collected body of material (sand, shingle etc.) that connects land to an offshore island
How do Beaches Form?
Beaches are one of the most common features of a coastline. Beaches are made up of eroded material that has been transported from elsewhere and deposited here by the sea.
Constructive waves help to build up beaches. The type of material found on a beach (i.e. sand or shingle) is influenced by the geology of the area and wave energy.
Material from long-shore drift builds up on the beach
Task: Write in your own words
How do spits form?
How do Bars Form?
These form in the same way as a spit initially but bars are created where a spit grows across a bay, joining two headlands. Behind the bar, a lagoon is created, where water has been trapped and the lagoon may gradually be infilled as a salt marsh develops due to it being a low energy zone, which encourages deposition.
How do tombolos form?
Tombolos are formed where a spit continues to grow outwards joining land to an offshore island.