The World ALFRED WEGENER THEORY OF CONTINENTAL DRIFT Found evidence for PANGAEA and proposed the theory of continental drift Continental Drift Theory Theory that continents were once part of a single landmass 200 million years ago that broke apart and have moved to their present locations ID: 1021903
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1. The Theory of Continental Drift
2. The World
3. ALFRED WEGENERTHEORY OF CONTINENTAL DRIFTFound evidence for PANGAEA and proposed the theory of continental drift.
4. Continental Drift TheoryTheory that continents were once part of a single landmass 200 million years ago that broke apart and have moved to their present locations. can drift apart from one another and have done so in the pastTheory was not accepted by scientists because he had no force (mechanism) that pushes and pulls the continents
5. PangaeaPangaea is the name given to the single landmass that was present 200 million years ago
6. Wegener’s 6 Evidences1) Fit of the Continents2) Fossils3) Mountains4) Glaciers5) Rock Types and Ages6) Climate
7. Continents“fit together” like puzzle pieces EVIDENCE #1 FIT OF CONTINENTS
8. The Fit between Africa and South AmericaEVIDENCE #1 FIT OF CONTINENTS
9. Fossil Evidencefossils are remains of living things that lived long ago.similar fossils have been discovered in matching coastlines on different continents. EVIDENCE #2 FOSSILS
10. EVIDENCE #2 FOSSILS
11. EVIDENCE #3 MOUNTAINSMountainsSome mountain ranges on different continents seem to match.Ex: ranges in Canada match Norway and SwedenEx: Appalachian Mtn. match UK mtn
12. EVIDENCE #3 MOUNTAINS
13. EVIDENCE #3 MOUNTAINS
14. EVIDENCE #4 GLACIERSGlaciers in areas that are now close to the Equator
15. Grooves carved by glaciers were found on many continents.EVIDENCE #4 GLACIERS
16. EVIDENCE #4 GLACIERS
17. EVIDENCE #4 GLACIERS
18. EVIDENCE #5 ROCK AGE AND TYPE
19. Wegener looked at certain areas on the Earth and their climatesNoted that the fossils he found on certain sections of Earth did not match the current climate.Fossils of tropical plants in the form of coal deposits in AntarcticaGlacier deposits in present day desert like areas in AfricaEVIDENCE #6 CLIMATE
20. Such as: Coal deposits in AntarcticaEVIDENCE #6 CLIMATE
21. Satellites used tomeasure the movement of continentsLaser Geodynamics Satellite (LAGEOS) Evidence of Continental Drift
22. All this evidence points to a Supercontinent.
23. The Theory of Continental Drift had a fatal weakness.Wegener couldn't answer the fundamental question:What kind of forces could be strong enough to move such large masses of solid rock over such great distances?
24. He said: The continents simply plowed through the ocean floor !!!
25. Wegener's theory was dismissed as being eccentric, preposterous, and improbable …Wegener died in 1930 never knowing that his theory was finally acceptedby most scientists.Technology developed during the 1940’s changed all that!
26. The Plates Move…So what now?Which way?50 million years
27. http://www.geo.cornell.edu/hawaii/220/PRI/PRI_PT_contdrift.htmlhttp://www.glencoe.com/sites/common_assets/science/virtual_labs/ES11/ES11.htmlTry these links below: