Tonian (1 ene 1000000000 año aC – 1 ene 720000000 año aC)
Descripción:
The Tonian is the first geologic period of the Neoproterozoic Era. It lasted from 1000 to 720 Mya. Instead of being based on stratigraphy, these dates are defined by the ICS based on radiometric chronometry. The Tonian is preceded by the Stenian Period of the Mesoproterozoic Era and followed by the Cryogenian.Añadido al timeline:
fecha:
1 ene 1000000000 año aC
1 ene 720000000 año aC
~ 5883516 years