Shaktimatha 369 Learning

 

Geography Optional – Paper II (India)

Previous Year Questions with Model Answers (Page–1 : Physical Setting of India)

Shaktimatha Learning | UPSC & UPPSC Geography Optional

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Q1. “India’s physiography is a product of its geological history.” Examine.

Introduction:
The present physiographic divisions of India are the outcome of long geological processes involving plate tectonics, volcanism, folding, faulting and erosion over millions of years.

Main Answer:

• The collision of the Indian Plate with the Eurasian Plate led to the formation of the Himalayan mountain system.
• The Peninsular Plateau represents one of the oldest landmasses of the world, composed mainly of igneous and metamorphic rocks.
• The Indo-Gangetic Plain was formed due to the deposition of alluvium brought by rivers originating in the Himalayas.
• Deccan Trap volcanism during the Cretaceous period shaped large parts of western and central India.
• Coastal plains and islands evolved through marine transgression, coral growth and tectonic movements.

Map to draw:
Outline map of India showing Himalayas, Peninsular Plateau, Indo-Gangetic Plain, Coastal Plains and Islands.

Conclusion:
Thus, India’s physiography is a direct reflection of its complex geological past, making geological history the key to understanding its physical landscape.

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Q2. Discuss the role of plate tectonics in shaping the physical features of India.

Introduction:
Plate tectonics explains the large-scale movements of lithospheric plates and provides a scientific basis for the evolution of India’s major landforms.

Main Answer:

• The northward movement of the Indian Plate resulted in the uplift of the Himalayas.
• Ongoing plate convergence explains seismic activity in the Himalayan and northeastern regions.
• The stability of the Peninsular Plateau is due to its location away from active plate boundaries.
• Rifting and volcanic activity led to the formation of the Deccan Trap region.

Map to draw:
Indian Plate movement with Eurasian Plate and Himalayan collision zone.

Conclusion:
Plate tectonics remains the most comprehensive explanation for India’s relief, seismicity and structural contrasts.

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Q3. Explain the significance of the Indian Plate in global plate tectonic history.

Introduction:
The Indian Plate has played a decisive role in global tectonics due to its rapid movement and continental collision.

Main Answer:

• It broke away from Gondwanaland and moved northwards at an exceptional speed.
• The collision with Eurasia led to the creation of the highest mountain system in the world.
• This collision altered global atmospheric circulation and climate patterns.
• It continues to influence tectonic activity in South Asia.

Conclusion:
The Indian Plate is not only central to India’s geography but also to the broader understanding of Earth’s tectonic evolution.

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End of Page–1 | Geography Optional – Paper II (India)