Geological History
- Earth history spiral
- The Triassic World (250-200 million years ago)
- The Jurassic World (200-140 million years ago)
- The Cretaceous World (140-65 million years ago)
- The Paleogene and Neogene world (65 – 2.5 million years ago)
- The Quaternary period (2.5 million years ago – present)
