M.Sc. (Semester III) (CBCS) (CGPA) Examination Mar/Apr-2018
Applied Geology
GEOTECTONICS AND PHYSICAL OCEANOGRAPHY
Time: 2½ Hours
Max. Marks: 70
Instructions: Answers any five questions. All questions carry equal marks. Question 1 is compulsory. Answer any two essay questions from Q.2, 3 4. Answer any two short notes questions from Q.5, 6 7. Draw neat and labeled diagrams wherever necessary.
Q.1
Multiple choice questions:
14
Which of the following are not associated with convergent plate margins?
Deep focus earthquakes
Island arc
Deep sea trench
Rift valley
The super continent Pangaea is fragmented at the age of
Proterozoic
Mesozoic
Paleozoic
Cenozoic
The Gondwanaland and Laurasia were separated by large body of water between Africa and Eurasia called as
Tethys sea
Atlantic ocean

Pacific ocean
Indian ocean
What are ophiolite suites?
Fragments of oceanic lithosphere emplaced on a continent
Groups of seafloor magnetic anomalies
Wedge- shaped packages of sediments that form at passive margins
Micro-continents that have traveled a long distance
When the estuary is essentially tideless and the floor of the estuary slope down towards the sea.
Stratified estuary
Partially mixed estuary
Salt wedge estuary
None
Coastal upwelling results in
Warm water surfacing
Nutrient rich water surfacing
Mixing of salt and fresh water
Lowering of high tides
The margin associated with island arc, marginal seas and inter arc basins are
Active
Passive
Transform
All of the above
Out of all tectonic regions of the globe, the maximum heat flow is found at
Subduction zone
Mid oceanic ridge
S
Island arc
All the above
D-layer is identified at boundary of
Upper mantle lower crust
Transition zone
O
Lower mantle core
Upper crust lower crust
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SLR-UB-44
10) Long, straight features parallel to the shore and separated from the main coasts by lagoons and bays.
Beaches
Barriers
Estuaries
None of the above
11) In which tectonic setting calc alkaline magma is generated
Oceanic rift
Subduction zone
Continental rift
Intraplate
12) The east coast of North America represents a
Convergent boundary
Divergent boundary
Transform boundary
None of the above
13) Compressive stresses, granitic magmas and intermediate depth earthquakes are associated with
Subduction zones
Continent continent convergence
Spreading centers
Transform boundaries
14) Sedimentary rocks laid down in a slowly subsiding basin along a receding continental margin are called
Continental shelf deposits
Ophiolite suites
Mélange deposits
None of the above
Q.2
Explain in detail the tectonic evolution of Himalaya with drifting of Indian sub continent.
14
Q.3
Describe in brief the oceanic sediments and its types.
14
Q.4
What is Estuaries? Explain in detail classification of estuaries with suitable examples.
14
Q.5
Write short note on the following.
14
Coastal pollution
Morphology of ocean floor
Q.6
Discuss in brief on the following.
14
Basic concept of plate tectonic.
Divergence and Convergence of ocean currents
Q.7
Describe the following.
14
Hydro thermal vents and its significance.
Factors controlling deposition of oceanic sediments.