Q3.
(a) How is the bulk Earth composition estimated ? For a differentiated Earth, how is its age of formation estimated?
(b) How would you explain the changes in rheological behaviour of Earth's mantle with increasing depth ?
| Detail | Information |
|---|---|
| Examination | Combined Geo-Scientist and Geologist Examination |
| Year | 2017 |
| Conducting Body | UPSC |
| Paper | Geology Paper - II |
| Subject | Geology |
| Duration | Three Hours |
| Maximum Marks | 200 |
| Question Type | Mixed |
This is the question paper for the Combined Geo-Scientist and Geologist Examination 2017, specifically for Geology Paper II, conducted by UPSC. The paper carries a maximum of 200 marks and candidates are allowed three hours to complete it. It is designed to assess candidates' in-depth knowledge of various aspects of Geology, including Mineralogy, Geochemistry, Petrology, Sedimentology, and Environmental Geology. Aspirants preparing for this examination can use this paper to understand the exam pattern, question types, and difficulty level, aiding in their strategic preparation.
(a) How is the bulk Earth composition estimated ? For a differentiated Earth, how is its age of formation estimated?
(b) How would you explain the changes in rheological behaviour of Earth's mantle with increasing depth ?
Section C
(a) Discuss the important petrological tools that are used to understand the origin and evolution of igneous rocks.
(b) Briefly discuss the origin and significance of Komatiites. Give examples of their occurrence in India.
(a) What are continental flood basalts? Discuss briefly their salient mineralogical and chemical characteristics.
(b) Discuss briefly, with the help of neat diagrams, the origin and significance of exsolution textures in feldspars.
Section D
(a) Describe the concept of equilibrium in the context of textural, mineralogical and chemical changes in metamorphic rocks.
(b) Comment on Ultra High Pressure metamorphism.
(a) Describe metamorphic facies series with the help of suitable diagrams.
(b) Discuss the role of fluids in metamorphism with suitable examples.
Section E
(a) Illustrate with neat, labelled sketches, the primary sedimentary structures that are likely to develop from varying conditions of deposition from simultaneous transport of sandy bedload and muddy suspension load in water medium. Comment on the possible depositional environment of such structures.
(b) With neat, labelled sketches, show the development of characteristic facies sequence in a meandering fluvial depositional system.
(a) Illustrate with a neat sketch, sedimentary basins in a convergent margin oceanic setting. How would you recognize such settings from sedimentary rock records.
(b) Comment on the variations in parasequence stacking patterns with base level changes.
Section F
(a) Elaborate on the geological, geophysical, geotechnical and other parameters that are considered while carrying out seismic zonation and seismic micro-zonation of a region.
(b) Discuss the specific requirements for pre-disposal management of waste from mines and beneficiation plants of radioactive ores.
(a) Describe the process of land degradation and elaborate on the causes and types of land degradation. Cite appropriate examples for each type.
(b) Citing examples, give an account of point and non-point sources of pollution.
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The examination is the Combined Geo-Scientist and Geologist Examination.
This question paper is for Geology Paper II.
The examination is conducted by UPSC (Union Public Service Commission).
This examination was held in the year 2017.
The maximum marks for Geology Paper II is 200.
The time allowed for Geology Paper II is Three Hours.