GATE GG-1 discipline:earth-and-geosciences PYQs & Answers — Page 11

Questions 101–110 of 650. Imported answers require independent review unless marked reviewed.

In which one of the following rivers does helical flow play an important role in controlling river dynamics and channel morphology?

Your answerChoose one option.

Meandering rivers

Straight rivers

Braided rivers

Bedrock rivers

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Which of the following statements is/are NOT correct for stratigraphy of the Himalaya?

Your answerSelect all correct options. You can choose more than one.

Tethyan Sedimentary Sequence rocks are of Precambrian age

The Lesser Himalayan Sequence rocks are younger than the Higher Himalayan Crystallines

The Sub-Himalayan Sequence rocks are younger than the Lesser Himalayan rocks

Collisional Himalayan orogeny occurred in the Cenozoic Era

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Which of the following factors will REDUCE the chances of landslide failure?

Your answerSelect all correct options. You can choose more than one.

Increase in shear stress

Increase in water content of pore spaces

Increase in angle of internal friction

Increase in cohesion of soil grains

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Which of the following rock and texture combinations is/are CORRECT?

Your answerSelect all correct options. You can choose more than one.

Komatiite and Spinifex

Gabbro and Ophitic

Marble and Granoblastic

Basalt and Porphyroblastic

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Which of the following statements regarding marine organisms is/are NOT true?

Your answerSelect all correct options. You can choose more than one.

Foraminifera are multicellular marine organisms

Sponges form their spicules with silica

Coccolithophores are sea-surface dwelling organisms

Species diversity of benthic foraminifera is less than that of planktonic foraminifera

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Which of the following rocks is/are characteristic of fossil subduction zones?

Your answerSelect all correct options. You can choose more than one.

Wollastonite and scapolite bearing skarn

Andalusite and staurolite bearing hornfels

Garnet and glaucophane bearing blueschist

Garnet and omphacite bearing eclogite

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Compared to Fe, Mg, and Ca, the content of K is extremely low in igneous clinopyroxene. Which of the following CANNOT explain its low abundance?

Your answerSelect all correct options. You can choose more than one.

K⁺ has a larger ionic radius than Fe²⁺, Mg²⁺ and Ca²⁺

K is incompatible and hence, enriched in the continental crust

K is fluid mobile and hence, easily leached out of clinopyroxene

K has multiple oxidation states

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The sediment yield at the outlet of a river having a catchment area of 8 km

is 6000 tons/year. If the sediment density is 1.5 g/cm

, the average erosion rate of the river basin is __________ mm/yr.

(Round off to two decimal places)

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In a hypothetical rock, the K

values of element E in minerals M1, M2, and M3 are 1.5, 1.0, and 0.5, respectively. The modal abundances of M1, M2, and M3 are 10%, 40%, and 50%, respectively. The bulk partition coefficient of element E in this rock is __________

(Round off to two decimal places)

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A particular Index of Alteration (IA) is defined as the molar concentration ratio (expressed as weight percentage) of fluid immobile element(s) to fluid mobile element(s) and is expressed by 100 × ([Al

] / ). For chemical weathering of silicate rocks, which one of the following statements is correct?

Your answerChoose one option.

High IA values (> 85) indicate intense chemical weathering

Low IA values (< 15) indicate intense chemical weathering

The IA values do not vary for silicate rocks

The minimum IA value for an unweathered granite is 0

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GATE GG-1 discipline:earth-and-geosciences PYQs

Question 36

Question 37

Question 38

Question 39

Question 40

Question 41

Question 42

Question 43

Question 44

Question 45