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Continental Drift Theory

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. “Puzzle Pieces”.

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Continental Drift Theory

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  1. 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

  2. “Puzzle Pieces” • Continents look like they could be part of a giant jigsaw puzzle

  3. Distribution of Fossils • Plant and animal fossils found on the coastlines of different continents

  4. Continental Drift: Evidence Correlation of mountains with nearly identical rocks and structures

  5. Sequence of Rocks • Same rock patterns found in South America, India, Africa, Antarctica and Australia

  6. Ancient Climates • Tropical plant remains (coal deposits) found in Antarctica • Glaciation in Africa, South America, India, and Australia during the same time

  7. Problems With The Theory • No mechanism for movement of continents • Wind and currents could possibly move fossils • Theory was not accepted by scientists

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