Terreneuvian (1 ene 538800000 año aC – 1 ene 521000000 año aC)
Descripción:
The Terreneuvian is the lowermost and oldest series of the Cambrian geological system. Its base is defined by the first appearance datum of the trace fossil Treptichnus pedum around 538.8 million years ago. Its top is defined as the first appearance of trilobites in the stratigraphic record around 521 million years ago. This series' name was formally accepted by the International Commission on Stratigraphy in 2007.Añadido al timeline:
fecha:
1 ene 538800000 año aC
1 ene 521000000 año aC
~ 5883516 years