Cambrian Series 2 (1 ene 521000000 año aC – 1 ene 506500000 año aC)
Descripción:
Cambrian Series 2 is the unnamed 2nd series of the Cambrian. It lies above the Terreneuvian series and below the Miaolingian. Series 2 has not been formally defined by the International Commission on Stratigraphy, lacking a precise lower boundary and subdivision into stages. The proposed lower boundary is the first appearance of trilobites which is estimated to be around 521 million years ago.Añadido al timeline:
fecha:
1 ene 521000000 año aC
1 ene 506500000 año aC
~ 5883516 years