alfred wegener theory of continental driftscienceline.ucsb.edu/images/continentaldrift-1.pdf ·...
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The Theory of Continental Drift
Continental Drift Discovery
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The World
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ALFRED WEGENERTHEORY OF CONTINENTAL
DRIFTFound evidence for PANGAEA and proposed the theory of continental drift.
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Continental Drift (p95 red book, 182 in Sciencesaurus)
• Theory that continents were
once part of a single
landmass that broke apart
and have moved to their
present locations.
• can drift apart from one
another and have done so in
the past
For more information about what the continents looked like throughout the Earth’s
History go to:
htttp://www.ucmp.berkeley.edu/geology/anim1.html
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Pangaea
Pangaea is the name given to the single
landmass that was present 200 million
years ago
Can you name the continents in Pangaea?
http://kids.earth.nasa.gov/archive/pangaea/Pangaea_game.html
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Recreating Wegener’s Discovery
Create your own Pangaea using the same
evidence Wegener used.
K12: Plate Tectonics
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Continents
“fit together”
like puzzle
pieces
WEGENER’S EVIDENCE
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WEGENER’S EVIDENCE
Fossil Evidence•fossils are remains of living things that lived long ago.•similar fossils have been discovered in matching coastlines on different continents.
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WEGENER’S EVIDENCE
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WEGENER’S EVIDENCE
• Mountains
– Some mountain ranges on different continents
seem to match.
• Ex: ranges in Canada match Norway and Sweden
• Ex: Appalachian Mtn. match UK mtn
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WEGENER’S EVIDENCE
• Climatic evidence such as glaciers in
areas that are now close to the Equator
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Satellites used to
measure the
movement of
continents
• Laser Geodynamics
Satellite (LAGEOS)
Evidence of Continental Drift
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The Plates Move…
So what now?
Which way?
• 50 million years