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  • ICAR and TNAU E-Course Summarized

    Summarized Notes
  • Choose the correct answer 1.Soil formed by transportation of water – Alluvial soil.2.Soil transported by glacier – Till soil. 3.Soil transported by gravity – Loess soil. 4.Soil transported by Sea water – Marine soil.

    Question: Choose the correct answer 1.Soil formed by transportation of water – Alluvial soil.2.Soil transported by glacier – Till soil. 3.Soil transported by gravity – Loess soil. 4.Soil transported by Sea water – Marine soil.

    Options:

    3
    1 and 2 only.
    1 and 3 only.
    1,2 and 4 only.

    ✅Explanation:
    Transported Soil:
    Transported soil is weathered soil deposits that are transported from one place to another by natural agents like wind, water, and glaciers.
    Based on the means of transportation, there are wind-transported soils, water-deposited soil and glacier-deposited soils.
    Water-deposited soils
    Water forms one of the major transporters of soil deposits.
    The soils carried and deposited by water are called alluvial deposits.
    Those deposits made in the lake are called lacustrine deposits.
    When these deposits are carried to the ocean or sea, it is called as marine deposits.
    Wind-transported soils
    The soil deposited by wind is called aeolian deposits.
    A type of silt deposited by wind is loess.
    This soil has a low density and is highly compressible.
    This type of soil lacks sufficient bearing capacity.
    Glacier-deposited soils
    Large glaciers during their movement, carry soils of various sizes to huge boulders.
    The soil gets mixed up with the glacier and gets transported to large distances.
    The deposits made by glaciers either directly or indirectly are known as drifts.
    When soil deposits are formed by the melting of glaciers, it is called till.
    These deposits of glacial till possess high shear strength and can be compacted to sufficient dry density.
    Gravity-deposited soils
    Soils can be transported and deposited by the action of gravity.
    Talus is a type of colluvial soil that is deposited by gravitational force.
    It consists of good coarse-grained particles and rock pieces which are highly demanded in engineering works.
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