The wet tropics have undergone many geological changes, especially considering it has been around for millions and millions of years. A significant mountain range in this area is the Great Dividing Range which formed about 300 million years ago, before the rainforest was even in the area, during the Carboniferous period. ("World Heritage Branch" n.d.). There are two other geomorphic regions in the wet tropics which are the lower coastal belt and the intermediate great escarpment ("World Heritage Branch" n.d.). Due to continental drift and Australia being a big island, it has many endemic species; meaning they can only be found one certain area ("World Heritage Branch" n.d.). If land masses were still in the form of Pangaea for example, then these animals could roam to other places. Continental drift is also important to Australia's biodiversity because it would have been further from the equator so animals very different from the ones that are there now could have evolved if Australia was not positioned how it is today.