Quote “Doesn 't the east coast of South America fit exactly against the west coast of Africa, as if they had once been joined?“ Unquote. These were Alfred Wegener’s words to his wife to be in 12/1910.
Wegner wrote this theory from the observation that the continents located in the southern hemisphere make a pattern of rock/fossils known as the ‘Gondwanaland’. The best explanation was that the continents were once a part of a bigger "super-continent" which was called Pangea. However, today the continents will not fit together as they once did, some would over lap and some would have huge, spacious gaps filled with ocean. This is due to the weathering and erosion of rocks.