Cambrian Series 2 (jan 1, 521000000 BC – jan 1, 506500000 BC)
Description:
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.Added to timeline:
Date:
jan 1, 521000000 BC
jan 1, 506500000 BC
~ 5883516 years