Question

Wind-blown deposits are called

• A. Alluvium
• B. Colluvium
• C. Loess
• D. Dune

Hint:

Parent materials:
- Loess: Wind-blown deposits (silt).
- Alluvium: Water-deposited (rivers).
- Colluvium: Gravity-deposited.
- Dune: Wind-blown sand.

Answer 1

The Correct Option is C

Step 1: Understanding the Question:
This question tests knowledge of soil parent materials and their modes of deposition.

Step 2: Detailed Explanation:
Wind-blown deposits are called loess (C).
Loess is a fine-grained, wind-deposited sediment composed primarily of silt-sized particles.
It is typically well-sorted and can form thick deposits.
Other options:
- Alluvium (A): Deposited by water (rivers).
- Colluvium (B): Deposited by gravity (mass wasting).
- Dune (D): Wind-blown sand deposits (but not loess).
Thus, loess is the wind-blown deposit.

Step 3: Final Answer:
Thus, wind-blown deposits are called loess, which corresponds to option (C).
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