| Consider the following statements: |
| 1. In most of the areas, the continental shelf is formed by constructive action. |
| 2. Precambrian shield is discovered under thick sediment of Mississippi river on the continental shelf. |
| 3. The assortment of sediments from coarse to fine is found on the shelf. Which of the above statements is/are correct? |
A) Only 2
B) 1 and 2
C) 2 and 3
D) 1 and 3
Correct Answer: D
Solution :
[d] The Precambrian Shield is an extensive structural unit of the Earth's crust composed of exposed basement rocks formed during the Archean or Proterozoic eons which together comprise the Precambrian Era ending 544 million years ago.
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