Tremadocian (1 янв 486850000 г. до нашей эры – 1 янв 477100000 г. до нашей эры)
Описание:
The Tremadocian is the lowest stage of Ordovician. Together with the later Floian Stage it forms the Lower Ordovician Epoch. The Tremadocian lasted from 486.85 to 477.1 million years ago. The base of the Tremadocian is defined as the first appearance of the conodont species Iapetognathus fluctivagus at the Global Boundary Stratotype Section and Point (GSSP) section on Newfoundland.Добавлено на ленту времени:
Дата:
1 янв 486850000 г. до нашей эры
1 янв 477100000 г. до нашей эры
~ 5883516 years