Corroded particles from limestone are dissolved by salt water & carried by the sea.
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Describe 'Suspended Load'
Grains (e.g. silt & clay particles) are supported by turbulence (erratic swirling of water). Most eroded material is transported in suspension.
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Describe 'Saltation'
The strongest currents move pebbles by saltation where they are bounced along the seabed. This is an important mechanism for sand transport by the wind (aeolian).
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Describe 'Traction'
Relatively slow mode of transport, where large particles (boulders) slide along the sea bed due to strong currents.
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Describe 'Bedload'
Grains are 'supported' (moved) by either continuous traction or saltation.
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How does the wind affect waves for longshore drift to take place?
Prevailing winds blow at an oblique angle to the shoreline & cause incoming waves to approach the shore at an oblique angle.
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How does longshore drift transport sediment?
The swash pushes pebbles & sand up onto the beach diagonally. Under the influence of gravity, backwash carries some of the deposited material back towards the sea at right angles.
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What is the long-term impact of longshore drift?
Moves sand, pebbles & gravel along the shore from one end of the beach to the other.
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Other cards in this set
Card 2
Front
Describe 'Suspended Load'
Back
Grains (e.g. silt & clay particles) are supported by turbulence (erratic swirling of water). Most eroded material is transported in suspension.
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