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A long, narrow sand dune or chain of dunes, generally oriented in a direction parallel to the prevailing wind or a direction resulting from two or more winds blowing at acute angles to each other. This description refers to which type of dune?
- a)Barchan
- b)Seif
- c)Loess
- d)Erg
Correct answer is option 'B'. Can you explain this answer?
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A long, narrow sand dune or chain of dunes, generally oriented in a d...
Type of dune: Seif
A seif dune is a long, narrow sand dune or chain of dunes that is generally oriented in a direction parallel to the prevailing wind or a direction resulting from two or more winds blowing at acute angles to each other.
Characteristics of a Seif dune:
- Orientation: Parallel to the prevailing wind direction or a direction resulting from two or more winds blowing at acute angles to each other.
- Shape: Long and narrow with a gentle slope on the windward side and a steep slope on the leeward side.
- Size: Can be several meters to several kilometers long and up to 150 meters high.
- Formation: Results from the movement of sand grains by wind.
Other types of dunes:
- Barchan dune: Crescent-shaped and formed by winds blowing predominantly from one direction.
- Loess: A type of sediment formed from wind-blown dust and silt.
- Erg: Large area covered with sand dunes.
This question belongs to the UPSC category, which is the Union Public Service Commission in India.
A seif dune is a long, narrow sand dune or chain of dunes that is generally oriented in a direction parallel to the prevailing wind or a direction resulting from two or more winds blowing at acute angles to each other.
Characteristics of a Seif dune:
- Orientation: Parallel to the prevailing wind direction or a direction resulting from two or more winds blowing at acute angles to each other.
- Shape: Long and narrow with a gentle slope on the windward side and a steep slope on the leeward side.
- Size: Can be several meters to several kilometers long and up to 150 meters high.
- Formation: Results from the movement of sand grains by wind.
Other types of dunes:
- Barchan dune: Crescent-shaped and formed by winds blowing predominantly from one direction.
- Loess: A type of sediment formed from wind-blown dust and silt.
- Erg: Large area covered with sand dunes.
This question belongs to the UPSC category, which is the Union Public Service Commission in India.
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A long, narrow sand dune or chain of dunes, generally oriented in a d...
Seif: a long, narrow sand dune or chain of dunes, generally oriented in a direction parallel to the prevailing wind or a direction resulting from two or more winds blowing at acute angles,to each other. The dune crest consists of a series of peaks and gaps, and the steep, or slip, face may change sides of the dune according to changes in wind direction.
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A long, narrow sand dune or chain of dunes, generally oriented in a direction parallel to the prevailing wind or a direction resulting from two or more winds blowing at acute angles to each other. This description refers to which type of dune?a) Barchanb) Seifc) Loessd) ErgCorrect answer is option 'B'. Can you explain this answer?
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