Tonian
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Tonian — The Tonian (from Greek tonas , stretch ) is the first geologic period in the Neoproterozoic Era and lasted from 1000 Ma to 850 Ma (million years ago). Instead of being based on stratigraphy, these dates are defined by the ICS based on radiometric … Wikipedia
tonian — wv/i2 to thunder … Old to modern English dictionary
Neoproterozoic — era 1000 542 million years ago Key events in the Neoproterozoic view • edit … Wikipedia
Cryogenian — Period 850–630 million years ago … Wikipedia
Geology of Tasmania — Tasmania has a varied geological history, with the world s biggest exposure of diabase, or dolerite. Rocks from the Neoproterozoic, Paleozoic and Mesozoic time periods appear. It is one of the few southern hemisphere areas glaciated during the… … Wikipedia
Geologic 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… … Wikipedia
Precambrian — For the album by German band The Ocean, see Precambrian (album). Precambrian Period 4567.17–542 million years ago … Wikipedia
Mesoproterozoic — era 1600 1000 million years ago Key events in the Mesoproterozoic view • edit … Wikipedia
Orosirian — The Orosirian ( /ˌɒrɵˈ … Wikipedia
Animal — Animalia redirects here. For other uses, see Animalia (disambiguation). For other uses, see Animal (disambiguation). Animals Temporal range: Ediacaran Recent … Wikipedia
