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Hazards! - Coggle Diagram

- - - - When you look at a map, the continents look like jigsaw pieces. It was seen as stupid if you would say 'the earth is moving around'. Until Alfred Wegener proposed his theory: 'The continents are like low density icebergs in a dense sea'. This is because there were discoveries of similar fossils and materials on the west of Africa, and the East of S America. His ideas were discredited due to a lack of notable mechanisms, and he died in Greenland due to the wintry environment.
    - - In the 1960s Harry Hess was apart of a submarine sonar crew, and he discovered that along the mid-Atlantic margin, there are magnetic elements facing N and S. these elements are in rows, indicating that they have been melted into the terrain since the last time the earth's poles switched. Meaning that new terrain is being created.