What is one piece of evidence that caused Wegener to think that continents moved
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One piece of evidence that caused Alfred Wegener to propose the idea of continental drift was the remarkable fit of the coastlines of South America and Africa. Wegener noticed that the eastern coast of South America seemed to align perfectly with the western coast of Africa, as if they were once joined together. This observation led him to speculate that the continents were once connected and then moved apart.
To arrive at this conclusion, Wegener analyzed detailed maps and found several matching geological features such as rock formations, mountain ranges, and coal beds between the two continents. He argued that the striking resemblance of these features across the two coastlines was more than just a coincidence and provided strong evidence that the continents were once connected.
Based on the idea of continental drift, Wegener proposed the theory of Pangaea, suggesting that all the continents were once part of a supercontinent that gradually broke apart and drifted away over millions of years.