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নি BJKE-U-GLY
INDIAN FOREST SERVICE (MAINJEXAM- 2023
GEOLOGY
PAPER—I
Time Allowed : Three Hours Maximum Marks : 200
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 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 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 question/part is
indicated against it.
Neat sketches may be drawn, wherever required.
Word limit in questions; wherever specified, should be adhered to.
Answers must be written in ENGLISH only.
BJKE-U-GLY/45 1 [2] 9
1. Answer the following within 150 words each :
(a)
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2. (a)
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4. (a)
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(c)
SECTION—A
Discuss the evidences of continental drift.
Enumerate the tectonic settings along which majority of earthquakes occur.
Where are deep and shallow focus earthquakes located?
Describe giving reason the difference between terrestrial and outer planets.
Describe the working of Global Positioning System.
Explain how the sense of shear in deformation zones can be determined from
pressure shadows.
Describe the remnant landforms that indicate occurrence of past glacial
activity over a region. How are the records of moraines useful in interpreting
past changes in climate?
Describe mid-oceanic ridge. Illustrate your answer with suitable diagram.
Describe dip isogon method of fold classification with suitable illustrations.
Discuss the three major plastic deformation mechanisms affecting rocks and
minerals.
Describe the application of remote sensing in Geology.
Describe weathering and its types. How does it influence climate and relief?
Describe different types of volcanoes. How does composition of lava regulate
the shape of landform built by them and the eruptive style of volcano?
Discuss the utility of thematic maps in GIS.
During fieldwork in the Southern Granulite Terrain, rectangular, lenticular
and barrel-shaped boudins were encountered. Sketch these boudins and
describe the conditions that lead to their formation.
BJKE-U-GLY/45 2
8x5=40
15
10
15
15
10
15
15
10
15
SECTION—B
5. Answer the following within 150 words each : 8x5=40
(a) Differentiate between Pelecypoda and Brachiopoda.
(b) Define facial suture line and its types with neat diagrams.
(c) Discuss the lithology of the Blaini Formation and add notes on the age and
depositional palaeoenvironment of the Formation.
(0) In an aquifer with hydraulic conductivity of 10 m/day and effective porosity
of 0:10, determine the velocity of groundwater flow between two locations
with elevation difference of 12 m, separated by 12000 m.
(e) Discuss the properties of laterite which make it useful as a building stone.
6. (a) Describe chronostratigraphic and time units. 15
(b) Differentiate between Schlumberger and Wenner electrical resistivity methods
for groundwater exploration. Illustrate the answer with suitable diagrams of
electrode positioning. 10
(c) Why do we study palaeontology in Geology? 15
7. (a) Discuss in brief the evolutionary trends in Equidae. 15
(b) Describe the lithostratigraphic succession of the Sausar Group and add notes
on its structural setup and economic importance. 10
(c) Describe the Hill-Piper diagram for representation of groundwater chemistry
data and illustrate the answer with diagrams, labelled with different
hydrogeochemical facies. 15
8. (a) Discuss the factors that ensure safety, stability and cost-effectiveness of dam
projects. 15
(b) Differentiate between regular and irregular echinoids. 10
(c) Discuss the palaeozoic sequence of Spiti Valley of Himachal Pradesh and its
fossil contents. 15
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BJKE-U-GLY/45 3 SB24—936
