GATE GG-1 topic:geology PYQs & Answers — Page 10

Questions 91–100 of 650. Imported answers require independent review unless marked reviewed.

A hillslope is shown below. If the area over the failure plane is 50 m

and the weight of the hillslope material (W) is 2000 tons, the Factor of Safety (FS) for this hillslope in dry conditions is ____________

(Cohesion along failure plane = 196 KPa, dip of failure plane = 60°, and internal friction angle = 30°).

(Round off to two decimal places)

Diagram for Geology and Geophysics question 26

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Which one of the following statements explains why elements Li, Be, and B have low cosmic abundance?

Your answerChoose one option.

These elements have low masses and hence, they break apart easily

These elements have low binding energies which makes them unstable at high temperatures at the core of stars

The low abundance of these elements is a unique feature of big stars with mass greater than 10 times that of our Sun

These elements are highly reactive and hence, unstable

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During a geochemical exploration survey in a hilly terrain, Cu concentration of stream sediments from a third order basin outlet was measured to be 3000 ppm. Considering a catchment area of 10 km

and a Cu background value of 200 ppm, which one of the following options is the productivity of this catchment for Cu?

Your answerChoose one option.

1.5 × 10

2.8 × 10

3.0 × 10

3.2 × 10

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The combinations listed below represent major minerals observed in four igneous rocks:

(i) Olivine and Anorthite, (ii) K-feldspar and Quartz, (iii) Mg-Ca-pyroxene and Ca-Na-plagioclase, (iv) Amphibole and Na-Ca-plagioclase

Arrange these mineral combinations based on decreasing temperature of magma crystallization.

Your answerChoose one option.

(i) > (ii) > (iii) > (iv)

(i) > (iii) > (iv) > (ii)

(i) > (iv) > (iii) > (ii)

(ii) > (i) > (iv) > (iii)

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Shown below is a schematic plot of

(deviation of

in a sample relative to CHUR) versus time. The two solid lines represent the evolution curves for the depleted mantle reservoir and the continental crust. Which one of the four dashed lines, marked 1, 2, 3, and 4, represents the evolution of the CHUR?

Diagram for Geology and Geophysics question 30

Your answerChoose one option.

Line 1

Line 2

Line 3

Line 4

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Which one of the following expressions represents porosity of a rock?

Your answerChoose one option.

(Solid volume − Pore volume) / Solid volume

(Bulk volume − Pore volume) / Bulk volume

(Bulk volume − Solid volume) / Solid volume

(Bulk volume − Solid volume) / Bulk volume

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Choose the correct option where both organisms do NOT secrete any CaCO₃ (calcite or aragonite).

Your answerChoose one option.

Foraminifera and Coccolithophore

Diatom and Radiolaria

Diatoms and Corals

Foraminifera and Radiolaria

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From the following optical properties of minerals, select an appropriate option to identify the direction of analyser and polarizer if the available microscope is without a cross-hair.

Your answerChoose one option.

Pleochoism of common hornblende

Extinction of diopside

Extinction of glaucophane

Pleochoism of biotite

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Which one of the following minerals has crystallographic axes

and all interaxial angles equal to 90°?

Your answerChoose one option.

Beryl

Barite

Plagioclase

Zircon

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Which one of the following statements correctly describes the features in the geological map?

Diagram for Geology and Geophysics question 35

Your answerChoose one option.

Horizontal sedimentary beds above a basalt basement

Anticline consisting of sedimentary rocks and basalt

Syncline consisting of sedimentary rocks and basalt

Steep south-dipping sedimentary beds above a basalt basement

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GATE GG-1 topic:geology PYQs

Question 26

Question 27

Question 28

Question 29

Question 30

Question 31

Question 32

Question 33

Question 34

Question 35