Which of the following geographical features or phenomena is/are associated with the Peninsular Block of India?
- Submergence of parts of the western coast due to tectonic activity
- Presence of residual mountain ranges such as the Veliconda hills and Mahendragiri hills
- Deep, V-shaped river valleys formed by fast-flowing rivers
Select the answer using the code given below:
- 1 only
- 1 and 2
- 2 and 3
- 3 only
Explanation
Statement 1 is correct
- The western coastal plains are an example of a submerged coastal plain. Due to its submergence, it is a narrow belt that provides natural conditions for the development of ports and harbours. Peninsular Block has generally remained a rigid block, except for some parts of its western coast which are submerged beneath the sea, and some other parts changed due to tectonic activity.
Statement 2 is correct
- The hills in the peninsular region are mainly of the relict type (residual hills). They are the remnants of the hills and horsts formed many millions of years ago. These hill ranges, along with river valleys, separate the plateaus of the Peninsular region. E.g., Aravali hills, Nallamala hills, Javadi hills, Veliconda hills, Palkonda range and Mahendragiri hills.
Statement 3 is incorrect
- Deep gorges and V-shaped valleys formed by fast-flowing youthful rivers are associated with the Himalayas and other young fold mountains, not the old Peninsular Block. The river valleys in the Peninsula are shallow and have low gradients, whereas the Himalayas have fast-flowing rivers that form gorges and V-shaped valleys.
