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Questions and Answers
What major piece of evidence did Wegener use to support his theory of continental drift?
What major piece of evidence did Wegener use to support his theory of continental drift?
Why was the theory of continental drift not immediately accepted by scientists?
Why was the theory of continental drift not immediately accepted by scientists?
What aspect of Harry Hess's theory provided the basis for seafloor spreading?
What aspect of Harry Hess's theory provided the basis for seafloor spreading?
What role did technology play in advancing our understanding of plate tectonics?
What role did technology play in advancing our understanding of plate tectonics?
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Which evidence related to past glaciation did Wegener present to support his theory?
Which evidence related to past glaciation did Wegener present to support his theory?
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Which geological feature is associated with Wadati-Benioff zones?
Which geological feature is associated with Wadati-Benioff zones?
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Which hypothesis explains the movement of tectonic plates through their interactions at plate boundaries?
Which hypothesis explains the movement of tectonic plates through their interactions at plate boundaries?
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What did Wegener's theory suggest about the distribution of coal in Antarctica?
What did Wegener's theory suggest about the distribution of coal in Antarctica?
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Which of the following is a type of evidence Wegener used to support his theory of continental drift?
Which of the following is a type of evidence Wegener used to support his theory of continental drift?
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What factor contributed to the initial rejection of Wegener's continental drift theory?
What factor contributed to the initial rejection of Wegener's continental drift theory?
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Which data did Harry Hess use to support his theory of seafloor spreading?
Which data did Harry Hess use to support his theory of seafloor spreading?
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What role has technology played in the study of plate tectonics?
What role has technology played in the study of plate tectonics?
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What type of geological evidence does Wegener cite related to coal deposits in Antarctica?
What type of geological evidence does Wegener cite related to coal deposits in Antarctica?
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Which of the following phenomena is associated with the Wadati-Benioff zones?
Which of the following phenomena is associated with the Wadati-Benioff zones?
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Which piece of evidence supports the theory of seafloor spreading?
Which piece of evidence supports the theory of seafloor spreading?
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What discovery did the mapping of the ocean floor reveal that supported plate tectonics?
What discovery did the mapping of the ocean floor reveal that supported plate tectonics?
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Study Notes
Evolution of Ocean Basins
- Wegener's theory of continental drift was supported by evidence including the fit of continents, similar fossils found on separated continents, similar rock types and mountain ranges on different continents, and evidence of past glaciation.
- Wegener's theory was not immediately accepted due to the lack of a mechanism to explain continental movement. His proposed mechanism, continental drift, was not well-supported by the scientific community at the time.
- Harry Hess's theory of seafloor spreading proposed that new crust is formed at mid-ocean ridges and older crust moves away from the ridge, explaining continental drift.
- Evidence for seafloor spreading included data from magnetic anomalies in the seafloor that showed a symmetrical pattern around mid-ocean ridges. This pattern mirrored the Earth's magnetic field reversals.
- Technology like sonar and paleomagnetic studies played significant roles in advancing the understanding of plate tectonics. Early sonar data used to map the ocean floor. Paleomagnetic studies of the seafloor provided crucial information for seafloor spreading.
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Description
Explore the evolution of ocean basins through the lens of continental drift and seafloor spreading. Learn about Wegener's theory, the evidence that supports it, and how Harry Hess expanded our understanding of plate tectonics. Dive into the technological advancements that provided crucial insights in this field.
