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Plate Tectonics and the movement of the Indian plate
प्लेट विवर्तनिकी और भारतीय प्लेट की गति
In this Class 11 Geography topic from “Distribution of Oceans and Continents,” students learn how plate tectonics explains the changing arrangement of continents and ocean basins. They study the structure and movement of lithospheric plates, the major types of plate boundaries, and the forces linked to their motion. The topic traces the Indian plate’s journey from Gondwana, its northward movement, and its collision with the Eurasian plate, connecting these processes with the formation of the Himalayas, earthquakes, and volcanism.
Practice questions
01 Why is the collision between the Indian Plate and the Eurasian Plate considered an example of a convergent boundary?
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Answer and explanation
Correct answer: B. Two plates are moving towards each other
Explanation: At a convergent boundary plates move towards each other and collide. The Himalayas are a major example of this process.
04 The Deccan Traps are most closely linked with which event related to the movement of the Indian Plate?
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Answer and explanation
Correct answer: A. Passage of the Indian Plate over the Reunion hotspot
Explanation: The Deccan Traps formed from extensive volcanic eruptions linked with a hotspot. In exams identify the relation between hotspot and plate movement.
09 What effect did the northward movement of the Indian Plate have on the Tibetan Plateau?
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Answer and explanation
Correct answer: A. It was uplifted and developed thickened crust
Explanation: The collision of the Indian Plate compressed the Eurasian part and helped uplift the Tibetan Plateau. The plateau and Himalayas are linked to this compression.
14 Why is maximum compression found along the northern edge of the Indian Plate?
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Answer and explanation
Correct answer: A. Because it is colliding with the Eurasian Plate
Explanation: The direct answer is A: maximum compression occurs along the northern edge of the Indian Plate because that edge is colliding with the Eurasian Plate. The Indian Plate moves generally northward, so its northern margin presses against Eurasia. This is a convergent plate setting. Compression shortens and folds rock layers and may push them upward, explaining the formation, uplift, and continuing activity of the Himalayas. Option A is correct because collision directly creates compressional stress. Option B is wrong because moving away from Antarctica would indicate separation in another direction, not the cause of maximum northern compression. Option C is wrong because the Indian Plate includes continental crust and does not lie only in the ocean. Option D is wrong because a plate boundary and active collision do exist there. Memory cue: northern collision produces compression, folding, and uplift.
18 Why is the depth of Himalayan earthquakes linked with Indian Plate movement generally limited?
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Answer and explanation
Correct answer: A. They are mainly linked with crustal compression and faulting
Explanation: Himalayan earthquakes arise from release of stored stress within the crust. The type of plate boundary is important for depth understanding.
24 How did marine sediments reach mountainous heights due to the northward displacement of the Indian Plate?
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Answer and explanation
Correct answer: A. Due to compression and uplift
Explanation: Marine sediments of the Tethys were compressed and uplifted during plate collision. This is why marine rock evidence occurs in the Himalayas.
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