What is the main cause of sand dune migration?
Answer and explanation
Correct answer: Grains climb the windward slope and fall on the slip face
Sand dunes migrate because wind transports individual grains up the gentle windward, or stoss, slope by saltation and surface creep. When grains reach the crest, they fall or avalanche down the steeper leeward slip face. Repeated movement shifts the whole dune in the downwind direction. Glacial flow, tides, and underground limestone solution are different geomorphic processes and do not produce ordinary aeolian dune migration.
Frequently asked questions
What is the correct answer to this question?
Grains climb the windward slope and fall on the slip face
Why is this the correct answer?
Sand dunes migrate because wind transports individual grains up the gentle windward, or stoss, slope by saltation and surface creep. When grains reach the crest, they fall or avalanche down the steeper leeward slip face. Repeated movement shifts the whole dune in the downwind direction. Glacial flow, tides, and underground limestone solution are different geomorphic processes and do not produce ordinary aeolian dune migration.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Theory Base of Accounting. Topic: accounting principles.
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