Shaktimatha 369 Learning

 

🟦 Geography Optional – MAINS

Paper–II : Indian Geography

Page – 17 | Himalayan Geomorphology & Tectonics

UPSC / UPPSC | Shaktimatha 369 Learning

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Q17. Analyse the tectonic evolution and geomorphological characteristics of the Himalayas. Discuss their significance in the Indian subcontinent.

Directive: Analyse + Discuss (Conceptual + Applied)

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Introduction

The Himalayas represent one of the youngest and most dynamic mountain systems in the world. They were formed due to the collision of the Indian Plate with the Eurasian Plate and continue to evolve tectonically.

Main Body

1. Tectonic Evolution of the Himalayas

• Northward movement of Indian Plate during Mesozoic era
• Collision with Eurasian Plate in the Cenozoic era
• Compression leading to folding and faulting
• Ongoing convergence causing uplift and earthquakes

2. Himalayan Structural Divisions

• Trans-Himalayas: Karakoram, Ladakh ranges
• Greater Himalayas (Himadri): Highest peaks
• Lesser Himalayas (Himachal): Valleys and ranges
• Shiwaliks: Youngest and most unstable

3. Geomorphological Characteristics

• Fold mountains with thrust faults
• Deep river gorges and antecedent drainage
• Glacial landforms like cirques and moraines
• High seismicity and landslide susceptibility

4. Significance of the Himalayas

• Climatic barrier influencing Indian monsoon
• Source of perennial rivers
• Biodiversity hotspot and water tower of Asia
• Strategic and geopolitical importance

5. Contemporary Issues

• Climate change and glacier retreat
• Increased frequency of landslides
• Challenges to infrastructure development

Conclusion

The Himalayas are not merely a physical feature but a dynamic system shaping India’s climate, hydrology and human activities. Understanding their tectonic nature is vital for disaster mitigation and sustainable development.

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Maps/Diagrams to draw in exam:
• Structural divisions of the Himalayas
• Plate collision diagram (India–Eurasia)
• Seismic zones of the Himalayan region

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Examiner’s View:
✔ Use tectonic terms correctly (thrust, fold, collision)
✔ Link geomorphology with hazards
✔ Map usage is compulsory for high scores

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End of MAINS – Paper II | Page 17
Shaktimatha 369 Learning