Cambrian Series 2 (1 янв 521000000 г. до нашей эры – 1 янв 506500000 г. до нашей эры)
Описание:
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.Добавлено на ленту времени:
Дата:
1 янв 521000000 г. до нашей эры
1 янв 506500000 г. до нашей эры
~ 5883516 years