Guzhangian (1 ene 500500000 año aC – 1 ene 497000000 año aC)
Descripción:
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.Añadido al timeline:
fecha:
1 ene 500500000 año aC
1 ene 497000000 año aC
~ 3502325 years