How does the Earth How does the Earth work?work?
Early 1900’s: Early 1900’s: Continental DriftContinental Drift Theory that continents and plates Theory that continents and plates
move on the surface of the Earthmove on the surface of the Earth No mechanism proposedNo mechanism proposed
Evidence for continental Evidence for continental driftdrift
Matching coastlines from early mapsMatching coastlines from early maps
Alfred WegenerAlfred Wegener
1915 maps by Wegener 1915 maps by Wegener of Pangaeaof Pangaea
Evidence for continental Evidence for continental driftdrift
Matching Coastlines
Evidence for continental Evidence for continental driftdrift
Evidence for continental Evidence for continental driftdrift
Matching mountainranges
Evidence for continental Evidence for continental driftdrift
Matching rock types
Evidence for continental Evidence for continental driftdrift
Matching glacierdeposits 300million yearsago
Evidence for continental Evidence for continental driftdrift
Glossopteris fernGlossopteris fern Found on all Found on all
southern southern continentscontinents
Evidence for continental Evidence for continental driftdrift
Matchingfossils
Evidence for continental Evidence for continental driftdrift
Matching coastlinesMatching coastlines Matching mountainsMatching mountains Matching rock typesMatching rock types Matching rock agesMatching rock ages Matching glacier depositsMatching glacier deposits Matching fossilsMatching fossils