Neoproterozoic
's information is
Birth and death years unknown
The Neoproterozoic is the last of the three geologic eras of the Proterozoic eon, spanning from 1 billion to 538.8 million years ago, and is the last era of the Precambrian "supereon". It is preceded by the Mesoproterozoic era and succeeded by the Paleozoic era of the Phanerozoic eon, and is further subdivided into three periods, the Tonian, Cryogenian and Ediacaran. One of the most severe glaciat
* Calculated from Wikipedia data.
Accuracy is not guaranteed.
| Neoproterozoic | ||||||
|---|---|---|---|---|---|---|
 Clockwise, from top left: Otavia, a multicellular organism from Tonian period, Snowball Earth glaciations from Cryogenian period, Ediacaran biota from Ediacaran period | ||||||
| Chronology | ||||||
| ||||||
| Proposed redefinition(s) | 850–541 Ma Gradstein et al., 2012 | |||||
| Proposed subdivisions | Cryogenian Period, 850–630 Ma Gradstein et al., 2012 | |||||
| Etymology | ||||||
| Name formality | Formal | |||||
| Usage information | ||||||
| Celestial body | Earth | |||||
| Regional usage | Global (ICS) | |||||
| Time scale(s) used | ICS Time Scale | |||||
| Definition | ||||||
| Chronological unit | Era | |||||
| Stratigraphic unit | Erathem | |||||
| Time span formality | Formal | |||||
| Lower boundary definition | Defined Chronometrically | |||||
| Lower GSSA ratified | 1990 | |||||
| Upper boundary definition | Appearance of the Ichnofossil Treptichnus pedum | |||||
| Upper boundary GSSP | Fortune Head section, Newfoundland, Canada 47°04′34″N 55°49′52″W / 47.0762°N 55.8310°W | |||||
| Upper GSSP ratified | August 1992 (as base of Cambrian) | |||||
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