Q. Consider the following statements:
Which of the above given statements is/are incorrect?
Explanation:
Statement 1 is incorrect: The Himalayas along with other peninsular mountains are young, weak and flexible in their geological structure unlike the rigid and stable Peninsular Block.
Statement 2 is correct: The Himalayan mountains are tectonic in origin dissected by fast flowing rivers that are in their youthful period. This stage is indicated by various land-forms such as gorges, V-shaped valleys, rapids, waterfalls etc.
Statement 3 is correct: Indo-Ganga-Brahmaputra plain was a geo-synclinal depression that achieved its maximum development in approximately 64 million years ago during the 3rd phase of Himalayan mountain formation. Since then the sediments carried by the Himalayan and Peninsular rivers have slowly filled it up.