Timeline

1. Timeline Kaleb Haase

2. 1500’s • A Dutch map maker named Abraham Ortelius noticed that some of the continents fit together like a puzzle. He said that North and South America used to be connected to Europe and Africa. He thought that they might have been separated by floods or earthquakes. Abraham’s map was close to what it is like now. He was a very good scientists.

3. 1800’s • An Austrian geologists named Edward Suess thought that North and South America were once one land mass. He called this Gondwanaland. This is a lot like Pangaea. His map of Gondwanaland looked like Pangaea. He also had an idea of Tethys Ocean.

4. 1912 • Alfred Wegener had an idea about continental movement. His hypothesis of one large landmass was called Pangaea. He believed this was about 250 million years ago. One piece of evidence is that he found pants across the ocean that were the same kind. He also found the same thing about animal fossils.

5. 1929 • A geologists named Arthur Holmes had a theory of convection. He said it occurred in the mantel. He said convection could pull and push plates. He had no evidence of this. They invented a magnetometer to detect small changes in magnetic field.