1
A-JGPT-M-HFP-B

GEOLOGY
PAPER-II
CONVENTIONAL)

ITime Allowed Three Hours IIMaximum Marks 200 I
QUESTION PAPER SPECIFIC INSTRUCTIONS
Please read each of the following instructions carefully before attempting questions
There are EIGHT questions in all out of which FNE are to be attempted.
Question Nos. 1 and 5 are compulsory. Out of the remaining SIX questions, THREE are to be attempted selecting at least ONE question from each of the two Sections A and B. 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 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 question/ part is indicated against it.
Answers must be written in ENGLISH only.
Neat sketches may be drawn, wherever required.


1 [P.T.O.
SECTION-A
1. Answer the following:8x5=40
(a)Write briefly about the isometric system, and enlist four mineral examples
with chemical composition for each. 8
(b)Discuss in short the Mohs scale of hardness, listing the designated minerals of
the scale. Is diamond ten times harder than talc? Justify your answer.
(c)Write about the parameters affecting the specific gravity of minerals. Does
specific gravity help mineral identification? Give examples. 8
(d)Enumerate any two types of twinning in minerals with neat sketches and
examples. 8
(e)Explain the importance of X-ray diffraction in understanding crystal
structures. 8

2.Discuss the following 20x2=40
(a)Classification of silicate mineral structures with neat diagrams 20
(b)Utility of ACF and AKF diagrams 20

3.(a)Give a tabular classification of non-clastic rocks. Add briefly about their depositional environment. 20
(b)Give an account of garnet group of minerals, and their significance in
understanding the grades of metamorphism. 20

4. Explain the following 10x4=40

(a)Skarn structure 10
(b)Piezoelectricity
(c)Twinkling
(d)Load casts
SECTION-B
5. Answer the following :8x5=40
Distinguish between the following:
Ore and Gangue minerals
Pit and Trench
Peat and Bog
Magnetite and Pyrolusite
Explain the following processes
Sublimation
Residual concentration
Saline incursion
Lateritisation

Give the geological and geographical distribution in India of the following
deposits: 8
Magmatic iron ore
Manganese are
Copper ore
Peat
Write very brief notes on the following 8
Stoney meteorites
Tenor of ore
Abrasive minerals
Nife
Discuss briefly the following: 8
P-waves
Tephra
Jaw crusher
REE
6.(a)Discuss the geobotanical method of prospecting, adding a note on the relevant
technique of sampling. 25
Briefly describe the stratigraphic controls of hydrocarbon prospecting. 15

7.(a)Describe the various methods of reserve estimation of ore deposits. 25
(b)Explain briefly the National Mineral Policy. 15

Discuss what important structures would be encountered if one takes a
journey from the earth surface to the periphery of its core. 20
(b)Explain the hazards escalated due to excessive anthropological interference
with the normal environmental stability. 20