GS1GS1

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Main Body

Explain the concept of plate tectonics & discuss its significance in explaining the geological phenomenon observed on earth.

Earth is divided into several tectonic plates whose movements cause several geological phenomenon.

Concept of tectonic plate:

1Lithosphere is divided into seven major & many minor plates.

2Tectonic plates can be a Oceanic plate, a continental plate or mix of both.

3Thickness of continental plate is more than Oceanic plate.

4The movement of plates happen due to convectional currents arising from mantle.

5Oceanic plate = Basaltic & Continental plate = Granitic nature.

Tectonics and Geological phenomenon:

1Continent-continent convergence leading to formation of fold mountains eg: Himalayas, Alps.

2Continent-ocean plate convergence leading to formation of continental arcs for eg: Cascade range leading to formation of fold mountains. eg: Andes, Rockies etc.

3Ocean-ocean divergence: Mid ocean's ridges are formed. Boundary of constructive nature (crust is formed) eg: Atlantic ridge.

4Continent-continent divergence: formation of rift valleys.

Lakes etc for eg: Great African rift valley, Lake Tanganyika etc

5Circum pacific (Pacific ring of fire): Associated with volcanoes, earthquakes, Tsunamis etc. Situated along ocean-continent convergence boundary.

6Trenches: formed in ocean along convergence boundary. eg: Mariana trench.

Tectonic plates are constantly shaping the face of earth through its movements and forming mountains, ridges, trenches, lakes etc

219 words7 paragraphs

Conclusion

Tectonic plates are constantly shaping the face of earth through its movements and forming mountains, ridges, trenches, lakes etc

19 words

Diagram

Simple diagrams showing surface warm water, deep cold water, and depth layers indicating temperature gradient

clear categorization of plate boundaries and their outcomes
good use of examples for different types of convergence and divergence
structured explanation of tectonics
comprehensive coverage of tectonic phenomena
good examples across different categories
clear explanation of constructive and destructive boundaries

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Page 20

Topper

Abhishek Singh

2023

Subject & Paper

GS1GS1

Topic

Physical Geography - Plate Tectonics

Plate Tectonics and Geological Phenomena

Concept of Plate Tectonics

Writing Stats

238

Total words

Paragraphs

technical-analytical

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