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🟦 Geography Optional – MAINS Level

Paper–I : Physical Geography

Page – 2 | Geomorphology

UPSC / UPPSC | Shaktimatha 369 Learning

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Q2. “Endogenic processes create relief, while exogenic processes modify it.” Critically examine this statement with suitable examples.

Demand of the question:
• Explain both processes
• Critically analyse (not just describe)
• Use examples

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Introduction

Endogenic and exogenic processes together shape the Earth’s surface. While endogenic forces originate from within the Earth and are responsible for primary relief features, exogenic forces operate on the surface and continuously modify these landforms.

Main Body

1. Role of Endogenic Processes (Relief Creation)

• Operate due to internal energy of the Earth
• Include tectonic movements, volcanism and earthquakes
• Create large-scale landforms such as:
  • Fold mountains – Himalayas
  • Block mountains – Vosges
  • Volcanic plateaus – Deccan Traps

2. Role of Exogenic Processes (Relief Modification)

• Driven by solar energy and gravity
• Include weathering, erosion, transportation and deposition
• Modify relief through agents like:
  • Rivers – valleys, floodplains
  • Glaciers – cirques, fjords
  • Wind – dunes, loess

3. Critical Examination

• Exogenic processes do not merely modify but can also create landforms (e.g., deltas, alluvial plains)
• Endogenic relief remains incomplete without exogenic shaping
• Landscape evolution is the result of continuous interaction between both

Conclusion

Thus, while endogenic processes provide the basic structural framework, exogenic processes sculpt and refine it. Earth’s relief is best understood as a dynamic balance between constructional and denudational forces.

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Diagram to draw in exam:
• Block diagram showing uplift (endogenic) and erosion (exogenic)
• Simple slope with weathering and river erosion

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Examiner’s View:
✔ Balanced treatment of both processes
✔ Critical element included (creation vs modification)
✔ Examples enhance credibility
✔ Diagrams can push score beyond average

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End of MAINS – Page 2
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