Geology IFS Paper 2 UPSC 2015 with Solutions

Geology Optional Paper 2 UPSC 2015 - Question Paper with Solutions 

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SECTION-A

1 Answer the following :-

Geology 1a Describe various types of twinning in minerals. Comment upon causes of twinning. (IFS 2015/10 Marks)

Geology 1b Based on mineralogy, distinguish basic and ultrabasic rocks. (IFS 2015/10 Marks)

Geology 1c Describe facies and grades of metamorphism. (IFS 2015/10 Marks)

Geology 1d Distinguish between arkose and greywackes and comment upon environment of their formation. (IFS 2015/10 Marks)

Geology 2a What is the fundamental unit of silicate structure? Discuss and classify different types of silicate structures. (IFS 2015/20 Marks)

Geology 2b Distinguish between uniaxial and biaxial minerals. (IFS 2015/20 Marks)

Geology 3a Using reaction principle, discuss about crystallization of basaltic magma. (IFS 2015/20 Marks)

Geology 3b Distinguish perthites and antiperthites and conditions of their formation. (IFS 2015/10 Marks)

Geology 3c What is eutectic crystallization? (IFS 2015/10 Marks)

Geology 4a How are sedimentary structures useful to establish the dynamics of deposition of sediments? (IFS 2015/20 Marks)

Geology 4b What do you understand by sphericity and roundness of sedimentary rocks? (IFS 2015/10 Marks)

Geology 4c Describe the matrix and cement of sedimentary rocks. (IFS 2015/10 Marks)

SECTION-B

5 Answer the following :-

Geology 5a Significance of gossan. (IFS 2015/8 Marks)

Geology 5b Podiform and stratiform chromite deposits. (IFS 2015/8 Marks)

Geology 5c Use of pathfinder elements in mineral exploration. (IFS 2015/8 Marks)

Geology 5d Radioactive waste disposal. (IFS 2015/8 Marks)

Geology 5e Coordination number and cite mineral examples. (IFS 2015/8 Marks)

Geology 6a Enumerate the controls of ore localization. (IFS 2015/20 Marks)

Geology 6b Discuss the mechanism for the formation of placer deposits and add a note on their provenance. (IFS 2015/10 Marks)

Geology 6c Describe geological setting and oil potential of Bombay High. (IFS 2015/10 Marks)

Geology 7a How are soil geochemical prospecting methods useful in the detection of secondary dispersion pattern of copper deposits? (IFS 2015/20 Marks)

Geology 7b Describe the electrical well-logging as applied to the prospecting of ore deposits. (IFS 2015/10 Marks)

Geology 7c Discuss the role of floatation reagents in mineral beneficiation. (IFS 2015/10 Marks)

Geology 8a Discuss geochemical classification of elements. Comment upon the role of trace elements in magmatic crystallization. (IFS 2015/20 Marks)

Geology 8b What are the earthquake parameters and causes of earthquake? (IFS 2015/10 Marks)

Geology 8c Explain the impact of mining on groundwater quality. (IFS 2015/10 Marks)