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Why was Alfred Wegener’s original explanation for continental motion rejected?
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paleogeography
Watch a time-lapse of Earth changing through geologic time, from the Cambrian Era to the projected period of Pangea Proxima.
Alfred Wegener’s hypothesis of continental drift was largely rejected by the scientific community during his lifetime primarily because he could not provide a plausible mechanism to explain how continents moved.1
Critics, such as Sir Harold Jeffreys, argued that the strength of the Earth's mantle was far too great to be overcome by any of the driving forces Wegener proposed. Beyond the lack of a viable physical mechanism, his ideas faced intense opposition for several reasons:2
- Inadequate Evidence: Skeptics questioned the accuracy of his observations regarding the fit of Atlantic coastlines and challenged his interpretation of geological strata and paleontological data.2
- Alternative Explanations: Many geologists attributed the presence of similar fossils on separated continents to the existence of former "land bridges" rather than continental movement.2
- Scientific Resistance: There was a strong institutional reluctance to abandon established geological paradigms, with some contemporaries feeling that accepting Wegener's work would require discarding decades of accumulated knowledge.2
It was not until the development of plate tectonics in the 1960s that the mechanisms for continental motion were finally understood and accepted.13