Download appendix 3

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Welcome
This is a document to explains the chosen concept to the
animator.
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This will take you through a 5 section process to provide the
necessary details to the animator before starting the animation.
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The legend on the left will indicate the current status of the
document. The big Black coloured number will denote the current
section, the Grey color would denote the completed sections,
and the Turquoise color would denote the remaining sections.
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The slides having yellow background (like this one) are the
'Instruction slides'
The wilson cycle
The cyclical opening and closing of ocean basins caused by movement of the
Earth's plates was first recognized by J. T. Wilson. The Wilson cycle begins with a
rising plume of magma and thinning of the overlying crust. As the crust continues
to thin due to extensional tectonic forces, an ocean basin forms and sediments
accumulate along its margins. Subsequently, subduction is initiated on one of the
ocean basin's margins, and the basin eventually closes up. When the crust begins
to thin again, another cycle begins.
Related LOs:
> Prior Viewing: Plate tectonics
> Future Viewing :

Course Name: Plate Tectonics
Author: Arpita Roy
Mentor: Prof. Soumyajit Mukherjee

Level: Post graduation
*The contents in this ppt are licensed under Creative Commons Attribution-NonCommercial-ShareAlike 2.5 India license
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Learning objectives
After interacting with this Learning Object, the learner will be
able to:
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Describe the geological phenomena of the Wilson Cycle
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Master layout or diagram
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Make a schematic diagram of the concept
Explain the animator about the beginning and ending of the
process.
Draw image big enough for explaining.
In the image, identify and label different components of the
process/phenomenon. (These are like characters in a film)
Illustrate the basic flow of action by using arrows. Use BOLD
lines in the diagram (minimum 2pts.)
In the slide after that, provide the definitions of ALL the labels
used in the diagram
You may have multiple master layouts.
• In this case, number the master layout.
(e.g. Master layout 1, 2, 3…)
Master layout
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• Animator should redraw diagrams
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• Text written in blue colour are instruction for the animator, these would not appear in
the final animation
• Text labeled in black colour would pop-up in animation
• Green arrows indicate the flow of the phenomenon/processes
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Keywords/Definitions
1. Rifting: A rift is a place where the Earth's crust and lithosphere are being pulled apart and is
an example of extensional tectonics
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2. Converging continental plates : In plate tectonics a convergent boundary, also known as a
destructive plate boundary an actively deforming region where two (or more) tectonic
plates or fragments of lithosphere move toward one another and collide. As a result of
pressure, friction, and plate material melting in the mantle, earthquakes and volcanoes are
common near convergent boundaries
3. Continental collision is a phenomenon of the plate tectonics of Earth that occurs at
convergent boundaries. Continental collision is a variation on the fundamental process of
subduction, whereby the subduction zone is destroyed, mountains produced, and two
continents sutured together
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Master layout:1
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1. A continent rifts
Molten
material
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2
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2
6. The continent
erodes, thins the
crust
2. As spreading continues,
an ocean opens, passive
margin cools and
sediments accumulate
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5. As two continents
collide, orogeny thickens
the crust and builds
mountain
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4. Terrain accretion from
the sedimentary wedge
welds material to the
continent
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3. Convergence begins; an
oceanic plate subducts, create
a volcanic chain at an active
margin
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Stepwise description of process
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The goal of the document is to provide instructions to an
animator who is not a expert.
You have to describe what steps the animator should take to
make your concept come alive as a moving visualization.
Use one slide per step. This will ensure clarity of the
explanation.
Add a image of the step in the box, and the details in the table
below the box.
You can use any images for reference, but mention about it's
copyright status
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The animator will have to re-draw / re-create the drawings
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Add more slides as per the requirement of the animation
Step: 1 Rifting of the continents by
mantle diapirism
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Molten
material
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Fig. 1
Hot spot
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Description of the action
1)
2)
Show the molten
material (red colored
part) as well as
brown colored part
is also spreading(as
shown by red arrows)
Time duration will be
5 seconds
Audio narration
Spreading of the
materials (both
red and brown
colored materials)
Text to be displayed
Step: 2 Continental drifting
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2
Spreading center gets
larger than Fig. 1
Fig. 2
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Description of the action
1)
2)
Audio narration
Spreading will be continuing As spreading continues, an ocean
here (shown with red
opens, passive margin cools and
arrow). The space from
sediments accumulate
which the spreading starts
has become larger than the
earlier stage (Fig. 1)
Time duration will be 5 -10
seconds
Text to be displayed
Step: 3 Continental drifting continues
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Fig. 3
Description of the action
Audio narration
1) Show that the blackish
brown colored part goes
towards depth and spreading
of the red colored material
will be continuing
2) Yellow colored part
indicating volcanism or
uprising of the orange
colored material
2) Timed duration of
spreading will be 10 seconds
Convergence begins; an
oceanic plate subducts,
create a volcanic chain at an
active margin
Both brown and
red colored part
is spreading
Text to be displayed
Step: 4 Convergence of
the subducting plate
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2
Volcanism
Fig. 4
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This blackish brown
colored part goes
towards depthConvergence starts
Description of the action
Audio narration
Terrain accretion from the
1) Show that the blackish
sedimentary wedge welds
brown colored part
material to the continent
continues its entering
towards depth
2) Volcanism will be shown
by yellow arrow
2) Time duration of
spreading will be 10 seconds
and time duration for
volcanism will be 5 seconds
Text to be displayed
Step: 5, After convergence
collision takes place
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Fig. 5
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Description of the action
1)
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2)
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Down going
part
Audio narration
As two continents collide,
Show the collision
between the two plates orogeny thickens the crust and
builds mountain
(shown by red arrow)
and deposition of
sedimentary materials
over there
Time duration will be
10 seconds
Deposition of
sedimentary
materials
Text to be displayed
Step: 6, Continental collision & final
closure of ocean basin
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2
Fig. 6
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Description of the action
Audio narration
1)
The continent erodes, thins
the crust
2)
Show that the two parts
have become a single
part after collision
Time duration will be 10
seconds
Text to be displayed
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Animation design
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Please see the design template provided in the next
slide.
This is a sample template, and you are free to change
as per your design requirements.
Try and rename the tabs / buttons / sections /
subsections as shown in the template.
Slide 3
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Use ‘callouts’ as shown above to explain the source of
content. Ex: If the call out is placed at the Tab 01,
and you want the content to be taken from slide 3 of
this presentation, then place this callout on the Tab
01, and write ‘Slide 3’ inside the callout.
Animation design
Molten
material
Interactivity
area
1. A continent rifts
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6
2
6. The continent
erodes, thinning
the crust
2. As spreading
continues, an ocean
opens, passive margin
cools and sediments
accumulate
Start
Definitions
Wilson Cycle
Replay
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5. As two continents
collide, orogeny
thickens the crust
and building
mountains
4. Terrain accretion
from the
sedimentary wedge
welds material to the
continent
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3. Convergence begins;
an oceanic plate
subducts, creating a
volcanic chain at an
active margin
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Click on each Figures .
Credits
APPENDIX 1
Self- Assessment Questionnaire for Learners
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Please provide a set of questions that a user can answer based
on the LO. They can be of the following types:
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These questions should be 5 in number and can be of
objective type (like MCQ, Match the columns, Yes or No,
Sequencing, Odd One Out).
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The questions can also be open-ended. The user would be
asked to think about the question. The author is requested to
provide hints if possible, but a full answer is not necessary.
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One can include questions, for which the user will need to
interact with the LO (with certain parameters) in order to
answer it.
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It is better to avoid questions based purely on recall.
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Questionnaire:
1) What could be the relation of Wilson cycle and plate tectonics?(Hint is needed
here)
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Hints: Accumulation of thick deposits of sediments of both shallow water and
deep water
deformation in the foreland fold and thrust with the
emplacement of ophiolitic rocks
deformation in the fold and thrust belt
Block faulting and fault bounded basins
2) What is hot spot? [mentioned in Fig. 1]
 a) Hot spot is a place from where molten magma rises up
b) Hot spot is a simple place beneath the asthenosphere, it’s not consists of
magmatic materials
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c) It can be present in any places beneath the lithosphere
d) None of these
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Questionnaire:
3) Wilson cycle consists of splitting of the continents; Splitting is related with
which structural feature and why?
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a) Splitting is associated with rifting as in central part it forms graben (depressed
blocks of land bounded by strike faults)
b) Splitting is related with normal fault as the parts had been segmented
c) Splitting is associated with thrust fault as the angle is very low while drifting
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d) None of these
4) What is active and passive continental margin in this process? [ active and passive
margin terms included in the Master layout slide]
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a) Margin associated with opening oceans-active continental margin and passive
continental margin
b) Margin associated with opening basin-passive continental margin and margin
associated with subduction- active continental margin
 c) Margin associated during rifting is known as active and margin separates the
two armed rift from the three armed rift is known as passive continental margin
d) None of these
APPENDIX 2
Links for further reading
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In the next slide, provide some reference
reading material for the users.
It could be books, reference publications, or
website URLs.
APPENDIX 2
Links for further reading
1. http://www.le.ac.uk/geology/art/gl209/lecture3/lecture3.html
2. http://www.thefreedictionary.com/Wilson+cycle
3. http://csmres.jmu.edu/geollab/Fichter/Wilson/Wilson.html
4. http://courseweb.glendale.edu/ppal/mtn_bldg.htm
5. http://www.futura-sciences.com/fr/news/t/geologie-1/d/
APPENDIX 3
Summary
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Please provide points to remember to understand the
concept/ key terms of the animation, in the next
slide.
The summary will help the user in the quick review of
the concept.
APPENDIX 3
Summary
The Wilson cycle begins with a rising plume of magma and the thinning of the overlying
crust. As the crust continues to thin due to extensional tectonic forces, an ocean basin
forms and sediments accumulate along its margins. Subsequently, subduction is initiated
on one of the ocean basin's margins and the ocean basin closes up. When the crust begins
to thin again, another cycle begins.