Cambrian Series 2 (1 jan 521000000 ano antes da era comum – 1 jan 506500000 ano antes da era comum)
Descrição:
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.Adicionado na linha do tempo:
Data:
1 jan 521000000 ano antes da era comum
1 jan 506500000 ano antes da era comum
~ 5883516 years