With reference to the Peninsular Block, consider the following statement:
1. It was formed by a mix of gneisses and granites, which make up most of the region.
2. The western coast is submergent and the eastern coast emergent in nature.
3. Rajasthan in the west and Karbi Anglong in the northeast are part of this region.
How many of the statements given above is/are correct?
(a) Only one
(b) Only two
(c) All three
(d) None
Explanation Statement 1 is correct: The Peninsula is formed essentially by a great complex of very ancient gneisses and granites, which constitutes a major part of it.
Statement 2 is correct: The western coast of the Peninsular Block is submergent, while the eastern coast is emergent in nature.
Since the Cambrian period, the Peninsula has been standing like a rigid block with the exception of some of its western coast which is submerged beneath the sea and some other parts changed due to tectonic activity without affecting the original basement. As a part of the Indo-Australian Plate, it has been subjected to various vertical movements and block faulting.
Statement 3 is correct: The northern boundary of the Peninsular Block can be described as an irregular line starting from Kachchh, running along the western side of the Aravali Range near Delhi, and then roughly following the Yamuna and Ganga rivers up to the Rajmahal Hills and the Ganga delta. Additionally, the Karbi Anglong and the Meghalaya Plateau in the northeast, along with Rajasthan in the west, are also part of this block. The northeastern parts are separated from the Chotanagpur plateau by the Malda fault in West Bengal. In Rajasthan, the desert and other desert-like features cover this block.
Kutos:Geography Expert
Hello! I am a Geography expert. You can ask any question or request a detailed analysis related to this topic.