Beaches are usually found in sheltered bays between two headlands. The headlands protect the area from erosion.
Low constructive waves deposit material on the shore and gradually a beach builds up.
Beaches may be of sand or shingle
Beach material is usually well sorted – most is of a similar size.
The larger the material is, the steeper the beach. Shingle and pebble beaches area steeper than sand beaches
At the top of the beach there may be a steep ridge where larger material has been thrown during storms .
Beach : a zone of deposited sand and shingle above the low water mark Processes : Constructive waves Destructive waves Deposition Transportation Longshore drift Sediment grading Words to use: storm beach gradient sand shingle swash backwash
Spurn Head Spurn Head Spit is a example of a spit on the east coast near Hull.
Spit : a long, narrow accumulation of sand or shingle formed by longshore drift with one end attached to the land Examples: Dawlish Warren (below),Spurn Head, Orford Ness, Blakeney Point Processes: Longshore drift Transportation Deposition Words to use: Hooked end Direction of longshore drift Prevailing winds Change in coastline direction/estuary Second dominant wind direction beach Stabilised shingle and sand saltmarsh dunes Zig zag movement Silt and mud accumulates
Bar and lagoon: a spit linking two headlands and trapping water on the landward side such as at Slapton Ley in Devon (below) Processes: Longshore drift Transportation Deposition Words to use: bay headland bar lagoon brackish silting and infilling beach Direction of longshore drift
Explain how a beach forms and mention why the formation of a beach depend upon constructive waves
Why does the material on a beach affect its gradient?
Explain how longshore drift may lead to the formation of a spit
Locate three spits on the shoreline of Britain. Produce a well anotated photograph for each one, describing the location of the spit, the direction of longshore drift and note any other characteristic features. (Spurn Head, Dawlish Warren, Blakeney Point, Hengistbury Head)
Explain why bars may be temporary coastal features.