continental drift pp
Post on 20-Jun-2015
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The Theory of Continental Drift
Continental Drift Theory
• Proposed by Alfred Wegener in 1912• 250 million years ago, all of the continents
were combined into one super-continent called “Pangaea”
• The continents gradually drifted apart to where they are today
Evidence to Support the Theory
“Puzzle Pieces”
• Continents look like they could be part of a giant jigsaw puzzle
Distribution of Fossils
• Plant and animal fossils found on the coastlines of different continents
Sequence of Rocks
• Same rock patterns found in South America, India, Africa, Antarctica and Australia
Ancient Climates• Tropical plant
remains (coal deposits) found in Antarctica
• Glaciation in Africa, South America, India, and Australia during the same time
Problems With The Theory
• No mechanism for movement of continents
• Wind and currents could possibly move fossils
• Theory was not accepted by scientists
Please look back through the notes and list the 4 main evidences of Continental Drift.
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