GATE GG-1 year:2019 PYQs & Answers — Page 5

Questions 41–50 of 65. Imported answers require independent review unless marked reviewed.

Match the type of twining (Group I) with the mineral (Group II) that best exhibits it.

Group I P. Carlsbad Q. Pericline R. Brazil S. Geniculated (elbow)

Group II

Rutile

Quartz

Orthoclase

Plagioclase

Your answerChoose one option.

P-3, Q-4, R-2, S-1

P-2, Q-4, R-1, S-3

P-3, Q-1, R-2, S-4

P-2, Q-1, R-3, S-4

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On inserting a first order red interference filter in SE-NW direction, the interference figure of quartz shows

Your answerChoose one option.

blue in NE, SW quadrants and yellow in NW, SE quadrants.

yellow in NE, SW quadrants and blue in NW, SE quadrants.

blue in NE, NW quadrants and yellow in SW, SE quadrants.

yellow in NE, NW quadrants and blue in SW, SE quadrants.

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Choose the CORRECT combination for the following two statements.

Statement I: Four elements that make up about 90% of the bulk Earth are Fe, O, Si and Mg (in decreasing order of wt % abundance).

Statement II: The four most abundant elements in the Earth’s crust (in decreasing order of wt % abundance) are O, Si, Al and Fe.

Your answerChoose one option.

Both Statements I and II are correct.

Both Statements I and II are incorrect.

Statement I is correct and Statement II is incorrect.

Statement I is incorrect and Statement II is correct.

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Choose the CORRECT combination for the following four statements.

Statement I: Anhydrous partial melting of peridotites produces basic magma. Statement II: Hydrous melting of peridotites produces andesitic magma. Statement III: Congruent melting of minerals produces liquids of compositions identical to the minerals. Statement IV: Incongruent melting of minerals produces liquids of different compositions and new solids.

Your answerChoose one option.

All the four statements I to IV are correct.

Statements I, II and III are correct but statement IV is incorrect.

Statements I and II are correct but statements III and IV are incorrect.

All the four statements I to IV are incorrect.

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The value of salinity, in terms of wt.% NaCl equivalent, of an aqueous saline bi-phase liquid-vapor fluid inclusions is determined by measurement of ______ during microthermometry.

Your answerChoose one option.

last ice-melting temperature

dissolution temperature of halite

eutectic temperature

homogenization temperature

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Which of the following case (s) represent (s) textural inversion in sandstone?

Case I: Rounded grains in clayey matrix.

Case II: Rounded, but poorly sorted grains.

Your answerChoose one option.

Only case I.

Only case II.

Both cases I and II.

Neither case I nor case II.

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Which one of the following set of statements regarding the overall nature of marine shelf succession is CORRECT? Statement I: Transgressive systems tract deposit is deepening upward Statement II: Highstand systems tract deposit is deepening upward Statement III: Falling stage systems tract deposit is deepening upward Statement IV: Lowstand systems tract deposit is overall shallowing upward

Your answerChoose one option.

I and II

II and III

III and IV

I and IV

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Which of the following set of statements is CORRECT? Statement I: A well sorted sandstone bed showing current ripple, planar laminae, convolute laminae and prod marks. Statement II: A poorly sorted sandstone bed showing wave ripples, dish structure, pillar structure and groove casts. Statement III: A well sorted sandstone bed showing desiccation cracks, current crescent planar laminae and convolute laminae. Statement IV: A poorly sorted sandstone bed showing current ripple, planar laminae, skip marks and load casts.

Your answerChoose one option.

I, II and III

II, III and IV

I, III and IV

I, II and IV

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In metapelites, which one of the following mineral assemblages is stable under green schist facies conditions?

Your answerChoose one option.

Albite + Chlorite + Actinolite + Epidote

Andesine + Biotite + Hornblende

Oligoclase + Biotite + Hornblende

Oligoclase + Epidote + Biotite + Hornblende

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Match the type of metamorphism listed in Group I with their products in Group II.

Group I P. Contact metamorphism Q. Shear zone metamorphism R. Ocean floor metamorphism S. Shock metamorphism

Group II

Impactite

Spilite

Mylonite

Skarn

Your answerChoose one option.

P-4, Q-3, R-2, S-1

P-2, Q-3, R-4, S-1

P-3, Q-1, R-2, S-4

P-1, Q-2, R-3, S-4

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GATE GG-1 year:2019 PYQs

Question 31

Question 32

Question 33

Question 34

Question 35

Question 36

Question 37

Question 38

Question 39

Question 40