Multiple Choice Questions on Depending upon the mode of formation sedimentary rocks are classified into three major groups ........... for UPSC Civil Services Examination (General Studies) Preparation

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Multiple Choice Questions

Depending upon the mode of formation sedimentary rocks are classified into three major groups ...........

Geography Earth Geology
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     Depending upon the mode of formation, sedimentary rocks are classified into three major groups. Consider the following statements in this context.

    1. Sandstone, conglomerate, shale, loess etc. are mechanically formed edimentary rocks.

    2. Geyserites, chalk, limestone, are organically formed sedimentary rocks.

    3. Chert, halite, potash etc. are some examples of chemically formed sedimentary rocks.

    Which of the above statements are correct?

     1 and 2 Only

    Incorrect Answer

     1 and 3 Only

    Incorrect Answer

     2 and 3 Only

    Incorrect Answer

     All of the above

    Correct Answer
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    Explanation:

    Clastic sedimentary rocks such as breccia, conglomerate, sandstone, siltstone, and shale are formed from mechanical weathering debris.

    Chemical sedimentary rocks, such as rock salt, iron ore, chert, flint, some dolomites, and some limestones, form when dissolved materials precipitate from solution.

    Organic sedimentary rocks such as coal, some dolomites, and some limestones, form from the accumulation of plant or animal debris.

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