Pangea

Pangea is the grouping of continents during a period of time. The Earth's crust are always moving across it. The Earth is made up of three chemical layers: the core, the mantle, and the crust. There is an inner core, an outer core, a lower mantle, and an upper mantle.

Continental drift was made up by meteorologist Alfred Wegener in 1912. Wegener thought the continents could stick together. Because of their shape it seemed possible that it could be true. There are four types of fossils that can prove Pangea: cynognathus, glossopteris, lystrosaurus, and mesosaurus. The rocks that are found if you dig through the EArth are basalt, sandstone, shale and coal. Wegener proposed that the poles remained fixed. When the plates slide, volcanoes or earthquakes happen to the Earth's crust. Another word for the crust is lithosphere. It is made up of upper mantle and the crust. At plate boundaries, plates slide past each other.