(Download) UPSC MAIN EXAM:2020 - GEOLOGY (Paper-1)

(Download) CS (MAIN) EXAM:2020 GEOLOGY (Paper I)

• Exam Name: CS (MAIN) EXAM:2020 GEOLOGY (Paper I)
• Marks: 250
• Time Allowed : Three Hours

SECTION-A

1. Answer the following questions in about 150 words each : 

(a) Discuss the different types of meteorites.

(b) Discuss various fields in which IRS data can be used for the development work and management of resources.

(c) Briefly describe two diagnostic landforms each of hot-arid and cold-arid climate. 

(d) How do we determine the top of beds from primary features?

(e) Briefly describe the classification of fold on the basis of fold attitude (dip and plunge). 

Q2. (a) Explain the internal structure of the earth. Add a note on discontinuities with neat sketches.

(b) Discuss the difference in geomorphology of the Eastern Coast and Western Coast of India. What is the main reason of the difference?

(c) What is an unconformity and what are its structural and stratigraphic importances? Discuss four different types of unconformities with neat sketches. 

Q3. (a) Discuss the salient features of Indian satellites Cartosat-3 and RISAT-2B. How are these superior to their predecessors? 

(b) Explain the magnitude and intensity as an expression of the size of an earthquake. Add a note on the damage caused by an earthquake. 

(c) What is a shear zone and what are the conditions of its formation? Discuss its general characteristics and types based on deformation type. 

Q4.(a) Discuss Mohr's stress diagram and its significance. What is its relevance in interpreting different stress conditions in rocks?

(b) Discuss the mechanism of seafloor spreading and give four evidences indicating the expansion in oceanic crust.

(c) Describe three main controlling factors of soil formation. How does the modern soil differ from the palaeosoil? 

SECTION-B

Q5. Answer the following questions in about 150 words each : 

(a) Describe three processes by which plant remains and invertebrate shells can be preserved as fossils. 

(b) Give an account of the mineral wealth associated with the Cuddapah Supergroup of rocks.

(c) Briefly describe the economic mineral deposits associated with the Tertiary rocks of India. 

(d) Explain the factors influencing the groundwater movement and storage.

(e) Discuss five engineering properties of rocks. 

Q6.(a) Discuss the morphological trends in the evolution of Homo sapiens from Proto-hominins. 

(b) Draw the tectonic sub-division map of India and discuss the salient features of each sub-division.

(c) Explain the process of saltwater intrusion with neat sketches. Give examples from India. 

7. (a) Describe the standard stratigraphic time scale of the earth, beginning from the 7 oldest to youngest. Discuss the principal events that took place during the time units. 

(b) Give an account of the Lower Gondwana flora from peninsular and - extra-peninsular India. What environmental conditions do they indicate?

(c) What is a landslide? Explain the different types and their causes. Give two examples from India. 

Q8.(a) Explain the natural and artificial recharge processes to enhance the ground water potential in hard and soft rock terrains. 

(b) Name two microfossils and discuss how these are used in reconstructing the palaeoclimatic conditions 
(c) Discuss about the Cretaceous-Tertiary boundary ((K-T boundary) with examples from India. 

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