Evidence for Continental Drift Theory

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What is the Continental Drift Theory?

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The theory that continents have moved over geological time and were once joined together in a supercontinent called Pangea.

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What is Pangea?

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A supercontinent where all Earth's continental crust was joined, existing around 335 million years ago.

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What is the 'Apparent Fit of the Continents'?

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The observation that the coastlines of continents, such as South America and Africa, fit together like puzzle pieces, suggesting they were once connected.

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What evidence did Wegener use to support his theory of Continental Drift?

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Wegener used evidence such as matching fossils, glacier scars, and aligned mountain ranges across continents.

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What are glacier striations?

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Scratches or grooves on rock surfaces caused by glacial movement, indicating past climate conditions.

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Why did scientists initially reject Wegener's theory?

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Scientists doubted Wegener's theory because he could not explain the force that could move the continents.

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What is fossil correlation?

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The matching of fossils from different continents to support the idea that continents were once connected.

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What role do mountain ranges play in supporting Continental Drift?

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Mountain ranges that align across continents suggest that those continents were once part of the same landmass.

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What is paleoclimate data?

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Evidence from ancient climates, such as glacial deposits, that indicates the historical positions of continents.

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What is the significance of Antarctica having fern fossils?

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The presence of fern fossils in Antarctica suggests that it was once located in a warmer climate, supporting the idea of continental movement.