Chapter 7: Plate Tectonics

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Presentation transcript:

Chapter 7: Plate Tectonics Section 1: Continental Drift

A. The continental drift hypothesis – continents have moved slowly to their current locations

1. All continents were once connected as one large landmass now called Pangaea

2. The landmass broke apart, and the continents drifted to their present positions

3. Evidence for continental drift Puzzle-like fit of the continents Similar fossils have been found on different continents

c. Remains of warm weather plants in Arctic areas and glacial deposits in tropical areas suggest that continents have moved

d. Similar rock structures are found on different continents

B. At first, continental drift was not accepted because no one could explain how or why continents had moved

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