Chapter 7

Chapter 7 - Chapter7Platetectonics:ScientificRevolution...

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Chapter 7-Plate tectonics: Scientific Revolution 18:28 Light year 186,000 miles per second X minutes X hours X days in a year approx 10 trillion kilometers Movement We are moving at 155,000 miles per second Moving around the earth 1600 km per day Continental Drift: An idea before its time Alfred Wegener o First proposed his continental drift hypothesis in 1915 o Published the origin of continents and oceans Continental drift hypothesis o Supercontinent called Pangaea began breaking apart about 200 million  years ago o Continents drifted to present positions Evidence used in support of continetal drift hypothesis o Fit of the continents If you virtually connect all continents then they fit together well o Fossil evidence Same fossils on different continents o Rock type and structural similarities Similarities in rock types of mountains in different continents o Paleoclimatic evidence Parts of glaciers from Antarctica was left on various continents Found this through examining sediments and see glacial sediments
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This note was uploaded on 09/28/2009 for the course GEOL 002 taught by Professor Brown during the Fall '09 term at GWU.

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Chapter 7 - Chapter7Platetectonics:ScientificRevolution...

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