What Five Factors Did Wegener Use to Support His Theory?
In proposing the theory of continental drift, Alfred Wegener relied on evidence from the shape of the continents, the distribution of plants and animals, similarities between landscapes, contiguous veins of ore that ran between continents, and the distribution of glacial deposits. Though the evidence for his hypothesis was strong, the theory lacked a mechanism and was not generally accepted during Wegener’s lifetime.
Wegener’s first line of evidence that the continents once formed a single landmass was the shape of the continents themselves. By ignoring the changeable coastlines and focusing instead on the continental shelves, Wegener showed that Africa and South America could fit together nearly seamlessly. In addition, the landscape of South Africa’s Great Karoo is very similar to the Santa Catarina formation in Brazil. Wegener argued that they were once a single contiguous feature.