GENERAL GEOLOGY

GEOLOGY

ENGINEERING GEOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is formed when sediments are dropped and deposited?
A
Aeolian deposits
B
Sand dunes
C
Loess
D
Rocks
Explanation: 

Detailed explanation-1: -Sand dunes (both active and stabilized by vegetation) can be found along beaches, and in arid or semi-arid regions. Dunes are mounds of loose sand created by wind and are the most well known aeolian features.

Detailed explanation-2: -Aeolian processes are those processes of erosion, transport, and deposition of sediments that are caused by wind at or near the surface of the earth. Sediment deposits produced by the action of wind and the sedimentary structures characteristic of these deposits are also described as aeolian.

Detailed explanation-3: -Aeolian deposits – sediments transported by the wind. The most important environments of aeolian transport and deposition are hot deserts, beaches, glacial outwash plains and cold deserts. Hyperarid (<150 mm ppt/yr) and arid desert regions (150-250 mm ppt/yr) are particularly important sites of aeolian activity.

Detailed explanation-4: -Abstract. Aeolian erosion develops through two principal processes: deflation (removal of loosened material and its transport as fine grains in atmospheric suspension) and abrasion (mechanical wear of coherent material).

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