artinskian horizons
1Geologic time scale — This clock representation shows some of the major units of geological time and definitive events of Earth history. The Hadean eon represents the time before fossil record of life on Earth; its upper boundary is now regarded as 4.0 Ga.[1] Other… …
2Carboniferous — For the album by Zu see Carboniferous (album). Carboniferous Period 359.2–299 million years ago …
3Devonian — For the Celtic language, see Southwestern Brythonic language; for the residents of the English county, see Devon. Devonian Period 416–359.2 million years ago …
4Jurassic — Period 199.6–145.5 million years ago …
