Test-1: Geomorphology (Examrace IAS Mains Geography Optional-Test Series 2017)

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1. (a) Little of the earth’s topography is older than tertiary and most of it is no older than Pleistocene. Elucidate. (20)

(b) Explain Stream Order. How stream order plays a vital role in watershed demarcation of the region? (15)

(c) Explain shoreline of submergence and emergence with examples. (15)

2. (a) Explain erosion surfaces and Wood’s postulates in determination of slope. (15)

(b) Explain origin of earth, highlighting the Planetesimal & Tidal Hypothesis and their differences? (15)

(c) Write short notes on (4 × 5 = 20)

  • Tobler’s First Law of Geography

  • Geomagnetic Reversals

  • Antiroot Hypothesis by Daly

  • Lapies and Dolines

3. (a) How are coastal landforms made? Explain the major erosional and depositional coastal landforms. (25)

(b) Explain the idea of sea floor spreading as propounded by Henry Hess and the evidences in support of it. (25)

4. (a) Pacific Ring of Fire is prone to frequent earthquakes and volcanic activities. What could be the suggested measures and effective disaster mitigation techniques? (20)

(b) Highlighting the shortcomings of Continental Drift Theory, explain how Plate Tectonics emerged as a much widely accepted theory? (15)

(c) Explain the concept of polycyclic landforms with suitable examples? (15)

5. (a) Explain peniplain, pediplain and endrumpf in lieu of the various theories of slope development? (30)

(b) What are the factors that lead to landscape rejuvenation? Suggest the resultant landforms generated. (20)

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