Guzhangian (1 gen 500500000 anni a. C. – 1 gen 497000000 anni a. C.)
Descrizione:
The Guzhangian is an uppermost stage of the Miaolingian Series of the Cambrian. It follows the Drumian Stage and precedes the Paibian Stage of the Furongian Series. The base is defined as the first appearance of the trilobite Lejopyge laevigata around 500.5 million years ago. The Guzhangian-Paibian boundary is marked by the first appearance of the trilobite Glyptagnostus reticulatus around 497 million years ago.Aggiunto al nastro di tempo:
Data:
1 gen 500500000 anni a. C.
1 gen 497000000 anni a. C.
~ 3502325 years