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Q: Deposits directly made by the melting glaciers are known as
  • A. talus
  • B. loess
  • C. drift
  • D. till
Correct Answer: Option D - Glacial deposit soil is called till. Glacial till (boulder clay)– Typically, a mixture of boulders, gravel, sand, silt and clay, deposited by glaciers and not transported or segregated by water. Loess– A loose deposit of wind-blown silt that has been weakly cemented with calcium carbonate and montmorillonite. Loess is formed in arid and semi-arid regions and stands in nearly vertical banks. Colluvial soil– The accumulation of rock debris or talus at the base of a steep cliff or a rock escarpment. Drift– All sediment of glacial origin are collectively known as glacial drift.
D. Glacial deposit soil is called till. Glacial till (boulder clay)– Typically, a mixture of boulders, gravel, sand, silt and clay, deposited by glaciers and not transported or segregated by water. Loess– A loose deposit of wind-blown silt that has been weakly cemented with calcium carbonate and montmorillonite. Loess is formed in arid and semi-arid regions and stands in nearly vertical banks. Colluvial soil– The accumulation of rock debris or talus at the base of a steep cliff or a rock escarpment. Drift– All sediment of glacial origin are collectively known as glacial drift.

Explanations:

Glacial deposit soil is called till. Glacial till (boulder clay)– Typically, a mixture of boulders, gravel, sand, silt and clay, deposited by glaciers and not transported or segregated by water. Loess– A loose deposit of wind-blown silt that has been weakly cemented with calcium carbonate and montmorillonite. Loess is formed in arid and semi-arid regions and stands in nearly vertical banks. Colluvial soil– The accumulation of rock debris or talus at the base of a steep cliff or a rock escarpment. Drift– All sediment of glacial origin are collectively known as glacial drift.