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Q: The most uniform soil deposit formed after transportation of soil is:
  • A. Glacial Deposit
  • B. Shore Deposit
  • C. Wind Laid Deposit
  • D. Delta Deposit
Correct Answer: Option C - Loess– It is a windblown deposit of silt. It is generally of uniform gradation, with the particle size between 0.01 to 0.05 mm. It consists of quartz and feldspar particles cemented with calcium carbonate or iron oxide, when wet, It becomes soft and compressible because cementing action is lost. A loess deposit has a loose structure with numerous root holes which produce vertical cleavage. The permeability in the vertical direction is generally much greater than that in the horizontal direction.
C. Loess– It is a windblown deposit of silt. It is generally of uniform gradation, with the particle size between 0.01 to 0.05 mm. It consists of quartz and feldspar particles cemented with calcium carbonate or iron oxide, when wet, It becomes soft and compressible because cementing action is lost. A loess deposit has a loose structure with numerous root holes which produce vertical cleavage. The permeability in the vertical direction is generally much greater than that in the horizontal direction.

Explanations:

Loess– It is a windblown deposit of silt. It is generally of uniform gradation, with the particle size between 0.01 to 0.05 mm. It consists of quartz and feldspar particles cemented with calcium carbonate or iron oxide, when wet, It becomes soft and compressible because cementing action is lost. A loess deposit has a loose structure with numerous root holes which produce vertical cleavage. The permeability in the vertical direction is generally much greater than that in the horizontal direction.