Name examples of locations that contain psammoseres.
Netherlands coast, Les Landes (SW France), West Wittering (SE UK)
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What are the 6 optimum conditions for psammoseres to form?
1) Abundant supply of sand (usually from sea bed) 2) A low beach gradient. 3) A macro-tidal range. 4) Strong prevailing onshore winds. 5) An area of 'inland space' for dunes to develop on. 6) Vegetation to colonise the dunes once formed.
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Define aeolian processes
Action of wind.
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What is the most common transport process of sand?
Saltation.
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Where do dunes usually begin to form?
Above the spring high tide level.
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Why do wet climates make it harder for sand to be moved?
Because sand clumps together.
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How do sand dunes begin to form?
1) Aeolian processes carry sand up the beach & deposits it around/on an obstacle (e.g. wood/vegetation). 2) Sand won't be moved until the wind reaches threshold velocity. 3) A fall in wind velocity will deposit the sand.
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What is the wind's threshold velocity?
When the wind's velocity is fast enough to move the particles of sand.
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Other cards in this set
Card 2
Front
Name examples of locations that contain psammoseres.
Back
Netherlands coast, Les Landes (SW France), West Wittering (SE UK)
Card 3
Front
What are the 6 optimum conditions for psammoseres to form?
Back
Card 4
Front
Define aeolian processes
Back
Card 5
Front
What is the most common transport process of sand?
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