I.F.S. EXA..M-2015
GEOLOGY

Paper-II

time Allowed Three Hours I I Maximum Marks 200 j

QUESTION PAPER SPECIFIC INSTRUCTIONS
Please read each of the following instructions carefully before attempting questions
There are EIGHT questions in all out of which FIVE are to be attempted.
Question Nos. 1 and S are compulsory. Out of the remaining SIX questions, THREE are to he ,attempted selecting at least ONE question from each of the two Sections A and B.

Attempts of questions shall be counted in sequential order. Unless struck off, attempt of a question shall be counted even if attempted partly. Any page or portion of the page left blank in the Question-cum-Answer Booklet must be clearly struck off.
All questions carry equal marks. The number of marks carried by a qustionlpart is indicated against it.
Answers must be written in ENGLISH only.
Neat sketches may be drawn, wherever required.

SECTION-A

Q. 1 Answer the following :-1ox4=40
Q. Describe various types of twinning in minerals. Comment upon causes of twinning.
Q. Based on mineralogy, distinguish basic and ultrabasic rocks.
Q. Describe facies and grades of metamorphism.
Q. Distinguish between arkose and greywackes and comment upon environment of their formation.

Q. What is the fundamental unit of silicate structure Discuss and classify different types of silicate structures. 20
Q. Distinguish between uniaxial and biaxial minerals. 20

Q. Using reaction principlet discuss about crystallization of basaltic magma. 20
Q. Distinguish perthites and antiperthites and conditions of their formation. 10
Q. What is eutectic crystallization IO

Q. How are sedimentary structures useful to establish the dynwnics of deposition of sediments 20
Q. What do you understand by sphericity and roundness of sedimentary rocks 10
Q. Describe the matrix and cement of sedimentary rocks.

SECTION-B

Q. 5 Answer the following

Q. Significance of gossan.
Q. Podiform and stratiform chromite deposits.
Q. Use of pathfinder elements in mineral exploration.
Q. Radioactive waste disposal.
Q. Coordination number and cite mineral examples.

Q. Enumerate the controls of ore localization.20

Discuss the mechanism for the formation of placer deposits and add a note on their provenance. 10
Q. Describe geological setting and oil potential of Bombay High.

Q. How are soil geochemical prospecting methods useful in the detection of secondary dispersion pattern of copper deposits 20
Q. Describe the electrical well-logging as applied to the prospecting of ore deposits. lO
Q. Discuss the role of floatation reagents in mineral beneficiation. 10

Q. Discuss geochemical classification of elements. Comment upon the role of trace elements in magmatic crystallization. 20
Q. What are the earthquake parameters and causes of earthquake
Q. Explain the impact of mining on groundwater quality. 10