M.Sc. (Semester III) (CBCS) Examination Mar/Apr-2018
Applied Geology
GEOTECTONIC AND PHYSICAL OCEANOGRAPHY
Time: 2½ Hours
Max. Marks: 70
Instructions: Answers not more than five questions. 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
Choose the correct answer:-
14
Continental shelves with margins are narrow and bordered by ocean trenches, often marked by irregular sea cliffs.
Active margin
Shore line
Passive margin
None
Lesser Himalayan domain in Himalaya is separated from great Himalaya by
Main central thrust
Main Boundary Thrust
Himalayan frontal fault
Indus Suture zone
The deep earthquakes generated along inclined surface of the sub ducting plate occur in
Subduction zone
Obduction zone

Benioff zone
Epicenter zone
The primary process by which nutrients in deep sea return to the surface water is
Heating of surface water
Downwelling
Upwelling
Surface of deep dwelling organism
What are ophiolite suites?
Fragments of ocean lithosphere emplaced on a continent
Groups of sea floor magnetic anomalies
Wedge shaped packages of sediment that form at passive margins
Micro continents that have provided a long distance
When the estuary in essentially tideless and the floor of the estuary slopes down towards the sea.
Partially mixed estuary
Salt wedge estuary
Stratified estuary
None of the above
Iceland is an exposed part of
Mid oceanic ridges
Iceland arcs
Shield areas
Plateau
Moving object are deflected to the right in the Northern hemisphere and to the left in the southern hemisphere due to earth's rotation. This is referred to as
Doppler effect
Greenhouse effect
Carioles effect
None
Page 2 of 2
SLR-UB-40
Out of all tectonic regions of the globe, the maximum heat flow is found in the
Subduction zone
Mid oceanic ridge
O
Flank province
Island arc
10) The oldest deep oceanic crust dated either geophysically or by paleontologically is
Archean age
Jurassic age
Proterozoic age
Cenozoic age
11) Crustal blocks that occur within organic belts whose rocks and structures contrast sharply with adjacent provinces are called
Ophiolites
Sutures
Microplates
Island arc
12) The theory of sea floor spreading is formulated by
Heiss Dietz
Taylor
Wegner
All of the above
13) Channels for sea ward transport of sediments through the continental rise.
Delta
Sea channels
Submarine canyons
None of the above
14) sediments are oceanic sediments derived from the land.
Biogenic
Terrigenous
Pelagic
Hamipelagic
Q.2
Explain in brief the magnetism, seismicity and volcanism at the divergent plate boundary.
14
Q.3
Discuss the types of oceanic sediments? Describe the deposition and distribution of oceanic sediments.
14
Q.4
What is ophiolite? Explain in detail the structure petrology and source of formation of oceanic crust.
14
Q.5
Write short notes
14
Passive Oceanic Margin
Types of Estaury
Q.6
Discuss the following:-
14
Causes of sea level changes
Origin of Himalayas
Q.7
Explain in brief:-
14
Continental drift
Topographic features of continental margin