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Loess plains are mainly formed by what?

Answer and explanation

Correct answer: Deposition of fine dust carried by wind

Direct answer: Option D is correct. Loess is a widespread deposit made mainly of very fine, wind-blown silt and dust. The material may come from exposed deserts, dry floodplains, or sediment left by meltwater beyond glaciers. Strong winds carry the tiny particles, and when wind energy decreases, the particles settle over broad areas. Repeated deposition can form thick, fairly uniform loess plains. Option A is wrong because coarse river gravel is heavy and is deposited by running water in channels or bars. Option B is wrong because ice is not loess sediment. Option C is wrong because coral is a marine biological or carbonate material. Option D correctly identifies both the fine material and the wind-deposition process. Memory cue: “loess is loose, light dust laid down by wind.”

Related tags

LoessWind DepositionFine DustAeolian DepositsGeographyAccounting SoftwareComputerized Accounting & Database SystemComputerized Accounting Database System

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