WJEC A-Level Geography 601-8455-3
Coastal Landscapes
Glaciated Landscapes
Tectonic Hazards
Changing Places
Water and Carbon Cycles
Global Migration
Global Governance of the Oceans
EcosystemsContemporary theme
Economic Growth and Challenge: IndiaContemporary theme
Economic Growth and Challenge: ChinaContemporary theme
Development in an African ContextContemporary theme
Energy Challenges and DilemmasContemporary theme
Weather and ClimateContemporary theme
Fieldwork and Geographical Skills
Coastal Landscapes
Depositional landforms of sandy coasts
- 2 things to know
- AS Unit 1
Overview
Formation of a beach, formation of a spit and recurved end.
What you need to know
Answer each one before you reveal it.
Describe the formation of a spit.
Questions from this subtopic
Each one with the model answer underneath.
- 1
Describe the formation of a beach.
Model answer
Constructive waves deliver more sediment up the shore than the backwash removes, so sand and shingle accumulate between the low water mark and the cliff or dune behind.
- 2
What is a berm?
Model answer
A berm is a ridge of sediment on the upper beach marking the limit reached by the swash of a recent high tide.
- 3
Describe the formation of a spit.
Model answer
Longshore drift carries sediment past an abrupt change in the direction of the coastline, and the material is deposited in the sheltered water beyond, building a ridge out from the shore.
- 4
Why does the end of a spit often curve landward?
Model answer
Waves arriving from a secondary direction, and refraction around the tip, push the distal end into the more sheltered water behind it.
- 5
What forms in the sheltered water behind a spit?
Model answer
A salt marsh or mudflat, because the spit shelters the water so that fine sediment can settle and vegetation can colonise.
- 6
What is a recurved end, and what does a series of them record?
Model answer
A recurved end is a hooked ridge at the tip of a spit, and a series of them records earlier positions of the tip as the spit has grown.
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