GEOLOGY
Paper-2 2014
QUESTION PAPER SPECIFIC INSTRUCTIONS
Please read each of the following instructions carefully before attempting questions.
There are EIGHT questions divided into two SECTIONS and printed both in HINDI and in ENGLISH.
Candidate has to attempt FIVE questions in all.
Question No.1 and 5 are compulsory and out of the remaining, THREE are to be attempted choosing
at least ONE from each section.
The number of marks carried by a question/part is indicated against it.
Answers rriust be written in the medium authorized in the Admission certificate which must be stated
clearly on the cover of this Question-cum-Answer booklet in the space proviqed. No marks will
be given for answers written in medium other than the authorized one.
Word limit in questions, wherever specified, should be adhered to.
Diagrams/ sketches, wherever required, may be drawn in the space provided for answering the question
itself.
Attempts of questions shall be counted in chronological order. Unless struck off, attempt of a question
shall be counted even if attempted partly. Any page or portion of the left blank in the answer book
must be. clearly struck off.

SECTION
1. Attempt the following with suitable diagrams JOx5=50
Explain why all quartz grains in a rock section do not show first order yellow interference colour when viewed under crossed polars.
What is pleochroism Explain why a section of biotite cut parallel to cleavage does not show any pleochroism but when it is cut oblique to cleavage shows pleochroism.
How are the clastic rocks classified on the basis of their grain-size?
Distinguish between 'concordant' and 'discordant' bodies of igneous rocks. Illustrate the. following with block diagrams laccolith and lopolith.
Distinguish between conglomerate and breccia.

Write the classification of silicate structure with neat sketches. 20
Discuss briefly on the construction ofNicol prism. Why it is necessary to cut and recement the calcite crystal in the classification ofNicol prism 15
A mineral section remains dark in all positions under crossed polars how it is possible and how will you proceed to determine the optic sign of the mineral, if applicable. 15

Explain the petrogenetic significance of the Diopside-Anorthite system (at 1 atm. dry). Draw
labelled sketches. 10
How will.you explain zoning in plagioclase by taking help of albite-anorthite system. 5

Elucidate petrogenetic significance of following:· · porphyntic teXture perthitic and cerona structure. ·
"Deccan volcanism marks an important event in Indian Geology"- Explain.this statement with logic. 6
3.(d)Citing an exampie of Al2Si05 palymorJihs, draw T-P phase diagram. Discuss its significance in metamorphism. 6
3.(e)Discuss briefly on 'Paired Metamorphic 8

4.(a)sketch and' explain different types of sedimentary facies. I5
4.(b)Give an of the cemeliting materials in sedimentary rocl5:s. 10
What is shale Describe textlire, composition and environments of deposition of shales. I 5
How would· you distinguish arkose and greyWackes Comment upon their enviroliment ofdeposition. I 0

SECTION

What are the diffcierices Banded !tim Formation and Ironstone'·? discuss about detrital component ofBanded Iron Formation.
Describe the geochemical and geobotanical methods of prospecting and their· appiit?ations.
Describe various methods of reserves.
Explain marine erosion as a coasful hizard and list its mitigation-measures. 10. ·
Biiefly give your concepts ori'Metallogenic provinces and epochs. Give' suitable . examples. I 0

"Gossans are the signboard of sulphide mineralization." Justify the statement citing an example of
Rajpur-Dariba areas ofRajasthan. 15
Discuss role of Singhbhum Shear Zone as a guide to mineralization with special reference to ore-forming processes. 15
Give an outline of the National Mineral Policy .. Comment on conservation and utilization of mineral
resources in India. 2 0

What are the common methods of resistivity survey Discuss working principle and field procedures involved in resistivity survey. Comment briefly on advantages and disadvantages of various configurations. 15
What are the non-metallic. minerals used in two different industries namely, Cement and Fertilizer? Comment upon mode of occurrence and their reserves in India. 20
What do you understand by mineral beneficiation How beneficiation of beach placer is useful · for radioactive minerals 15

Describe internal structure and composition of the earth. Discuss various rules governing distribution of trace in the earth's crust. · 20
What do you understand by Landslides Discuss briefly various types oflandslides. Comment upon causes and remedial measures oflandslides. 15
Describe Reservoir Induced Seismicity with a particular reference to Koyna earthquake. 15