Topic: Geographical features and their location-changes in critical geographical features (including water-bodies and ice-caps) and in flora and fauna and the effects of such changes.
3) Define Mantle Plume and explain its role in plate tectonics.(250 words)
Physical geography by Savindra Singh
Why this question:
The question is from the static portions of GS paper I. one must discuss the concept of Mantle Plume and its possible role in Plate Tectonics.
Key demand of the question:
The question is straightforward, explain the concept of Mantle Plume and explain its role in plate tectonics.
Explain – Clarify the topic by giving a detailed account as to how and why it occurred, or what is the particular context. You must be defining key terms where ever appropriate, and substantiate with relevant associated facts.
Structure of the answer:
A mantle plume is an upwelling of abnormally hot rock within the Earth’s mantle.
In the body of the answer start discussing by enumerating basics of Plate tectonics, then explain what is mantle plume and its role in plate tectonics.
Explain that Earth’s mantle plays an important role in the evolution of the crust and provides the thermal and mechanical driving forces for plate tectonics.
Discuss the details such as – What happens as a tectonic plate moves over a mantle plume etc.
Conclude with significance of such phenomenon.