The Peninsular Block
The northern boundary of the Peninsular Block can be traced along an irregular line from Kachchh, running along the western flank of the Aravali Range near Delhi, and then roughly parallel to the Yamuna and the Ganga rivers until reaching the Rajmahal Hills and the Ganga delta. Extensions of this block include the Karbi Anglong and the Meghalaya Plateau in the northeast, and Rajasthan in the west. In West Bengal, the northeastern parts are separated from the Chotanagpur Plateau by the Malda fault, while in Rajasthan, desert and desert-like features overlay this block.
Primarily composed of ancient gneisses and granites, the Peninsula has remained relatively stable since the Cambrian period, with exceptions such as parts of its western coast submerged beneath the sea and some regions altered due to tectonic activity. As a part of the Indo-Australian Plate, the Peninsula has experienced various vertical movements and block faulting, resulting in features like the rift valleys of the Narmada, Tapi, and Mahanadi rivers, and the Satpura block mountains. Relict and residual mountains, such as the Aravali hills, Nallamala hills, Javadi hills, Veliconda hills, Palkonda range, and Mahendragiri hills, characterize the Peninsula. River valleys here tend to be shallow with low gradients.
Many east-flowing rivers in the Peninsula form deltas before reaching the Bay of Bengal, with notable examples including the deltas of the Mahanadi, Krishna, Kaveri, and Godavari rivers.
Structure and Physiography| Chapter 2 Class 11 Geography Notes
Class 11 Geography Ch 2 Structure and Physiography Notes: In Class 11 Geography Chapter 2, we learn about the different shapes and features of the Earth’s surface. This includes things like mountains, plateaus, plains, and valleys. We examine how these features are formed over a long time by various natural processes like movement of the Earth’s crust, erosion, and deposition. By studying this chapter, we get to understand more about how the Earth’s surface changes and how it’s connected to geological processes.
The Structure and Physiography notes cover all the necessary topics that are extremely important for the examination 2024. It can save you time and will positively affect your results.
Structure and Physiography| Chapter 2 Class 11 Geography Notes