1/2/2023 0 Comments Abraham ortelius theory![]() ![]() ![]() Fragments of what is apparently a single mountain system are observed on both sides of the north Atlantic Ocean.Fossils of identical trees are found in South America, India and Australia. ![]() Fossils of identical land-dwelling animals are found in South America and in southern Africa, but nowhere else.Some of the evidence put forward in support of Wegener’s theory included: When the ocean floors were mapped, and their rocks and fossils studied, a clearer picture of the history of the Earth emerged. Of the mantle acted like conveyor belts moving the continents around. Holmes put forward the idea that circular movements In the 1930s an English geologist called Arthur At the time the fluid- like properties of the mantle had not been discovered, and geophysicists argued that the continental crust and oceanic crust could not slide over each other because there would be too much friction between them. Wegener’s theory was not taken very seriously because Wegener could not suggest how such large pieces of land were able to move around the Earth. About 200 million years ago Pangaea broke apart and the continents have been moving ever since. ‘supercontinent’ called Pangaea (pan- GEE-a). He suggested that all the continents of the world were once joined together to form a large In 1912 a meteorologist named Alfred Wegener (pronounced VEG-en-er) put forward the theory of continental drift. In 1620 Sir Francis Bacon also examined the coastlines of South America and Africa and suggested they might once have been joined together. In 1596 a Dutch map maker called Abraham Ortelius noticed that the coasts of North and South America, Europe and Africa had shapes that could be fitted together. ![]()
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