UPSC Geography Oceans and continents Question Bank Oceanography

  • question_answer Consider the following statements regarding barrier reefs:
    1. Barrier reefs are separated from the mainland by a lagoon.
    2. Landward slope of a barrier reef is steeper than its seaward slope.
    3. Barrier reefs are always found as continuous chain.
    4. The surface of barrier reef is composed of boulders, coral debris and sand deposits
    Which of the above statements are correct?

    A)  1 and 2           

    B)  2 and 3

    C)  3 and 4           

    D)  1 and 4

    Correct Answer: D

    Solution :

     Usually the seaward slope of a barrier reef is steeper than the landward slope. Barrier reefs are seldom found as continuous chain, rather they are often broken at several places and gaps are found between different parts of such reefs. Sometimes these passages are so wide that even ships can pass through them.                                                                                    

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