continental drift 2014-15 presentation
DESCRIPTION
History of Continental Drift ideas - used with students at York CollegeTRANSCRIPT
- 1. Alfred Wegener (1880 1930)
2. Evidence Fit of continents Glaciations tillites Rock types Fossil distributions Mountain chains Polar Wandering/Climatic bands 3. Fit of the Continents 4. South America seems to fit into Africa Fit is not exact suggestreasons why? 5. Fit of thecontinents showinggaps /overlapsthat exist 6. Rock types Carboniferous coals andtillites Permian redsandstones Upper Triassic floodbasaltsRed sandstones (Permian) 7. Rock types PrecambrianCratons/Shield areas 8. Mountain Chains There is a fold mountainbelt that runs as acontinuous belt betweenAfrica and SouthAmerica 9. Fossil DistributionsLystrosaurusCynognathusMesosaurusGlossopteris 10. Mesosaurus 11. The PermianIce AgeProblem 12. Permian IceAge tillites(ancientglacialdeposits) 13. Carboniferous glacial deposits showing direction of striations 14. Pangaea (All Earth)Permian 250 Ma 15. Breakup of Pangaea