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Plate Tectonics
Plate
Theory
Mountain
Building
Folds &
Faults
General
Plate Qs
Miscellaneous
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Plate
Boundaries
Alfred Wegener is responsible
for what theory relating
to Plate Tectonics?
Continental
Drift
What specifically does the
term Pangaea mean?
All Lands
If new crust is being created at the
mid-ocean ridges, why isn’t the
earth getting larger?
It is being destroyed
(recycled) in subduction
zones
What invention of the early 1900‘s
helped geologist Harry Hess
come up with his idea of
sea-floor spreading?
Sonar
How do magnetic stripes in
ocean floor rock provide evidence
of sea-floor spreading?
Stripes are the recorded
reversals of Earth’s
magnetic poles in rocks
The lithosphere is destroyed at
These (2x) plate boundaries?
(be specific)
Oceanic-Oceanic,
Oceanic-Continental
What is the driving force behind
the movement of the
lithospheric plates?
Convection
Currents
What are three physical features
that can be produced at a
convergent boundary?
Trenches,
Mountains,
Volcanoes
As plates move apart at a
divergent boundary what is
created between the plates?
Rift valley
Why aren’t volcanoes produced
at a continental-continental
plate boundary?
No subduction
The type of stress that produces
earthquakes but not mountains?
Shear
Compressional stress without subduction
will produce what? (2 things)
mountains and
earthquakes
What type of plate boundary formed
the Andes mountains?
(be specific)
OceanicContinental
Mountains along
a divergent boundary would be
made from what type of rock?
Igneous Rock
Being in the middle of a plate, explain
how the volcanic islands of
Hawaii were formed.
Hot Spot in the
mantle
Stress resulting from the
squeezing together of rock.
Compressional
Found between the footwall
and hanging wall.
Fault Plane
Fault in which the hanging wall
moves up in relation to
footwall.
Reverse Fault
Fold or bend of rocks in which they
have created a downward bulge.
Syncline
Stress that would create a
fault-block mountain.
Tensional
Stress
What type of fault is shown below?
Thrust Fault
Term describing what happens
when one plate goes under another.
Subduction
The San Andreas fault
lies along what type of boundary?
Name the two plates on either side
of the fault.
Transform: Pacific
and N. American
Plates
What type of fault is created
when the hanging wall moves
down in relation to the footwall?
Normal
Name one piece of evidence that supports
Hess and his theory of
sea-floor spreading.
Age of ocean rocks,
Magnetic stripes,
earthquake foci
The change in shape and structure
of rock is due to what?
Deformation
(Stress)
Most volcanoes are found
near what other geologic feature?
Trenches
Why didn’t the scientific
community believe Alfred
Wegener’s theory of continental
drift?
No mechanism
for movement
How is a dome mountain formed?
Uplifting of
land from
magma
How did Alfred Wegener use
glacier evidence to support his
theory of Continental Drift?
Glaciers move outward
toward the ocean; this is
only possible if continents
formed one large massive
continent (Pangea)
Plate Tectonics
Plate
Theory
Plate
Boundaries
Mountain
Building
Folds &
Faults
General
Plate Qs
Miscellaneous
Final Jeopardy
What do the letters in the word
“Sonar” stand for?
Sound Navigation and
Ranging
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