GATE GG-1 Global tectonics PYQs & Answers — Page 2

Questions 11–13 of 13. Imported answers require independent review unless marked reviewed.

The figure below shows the triple junction between three plates A, B and C. The boundary between the plates A and B is a ridge with a half-spreading rate of 4 cm/year. The A-C and B-C boundaries are collinear and orthogonal to the A-B ridge. The A-C boundary is a dextral transform fault with a relative velocity of 6 cm/year. The boundary between plates B and C is

Diagram for Geology and Geophysics question 12

Your answerChoose one option.

dextral transform fault with a relative velocity of 10 cm/year.

dextral transform fault with a relative velocity of 2 cm/year.

sinistral transform fault with a relative velocity of 2 cm/year.

sinistral transform fault with a relative velocity of 6 cm/year.

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Assertion (a): High-temperature, low-pressure metamorphism occurs on the over-riding plate near convergent plate margins. Reason (r): Partial melting in the mantle wedge generates magmas that rise to form the arc.

Your answerChoose one option.

(a) is true but (r) is false.

(a) is false but (r) is true.

Both (a) and (r) are true and (r) is the correct reason for (a).

Both (a) and (r) are true and (r) is not the correct reason for (a).

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Which one of the following is a continental hotspot?

Your answerChoose one option.

Reunion

Macdonald

Hawaii

Afar

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GATE GG-1 Global tectonics PYQs

Question 12

Question 43

Question 1