Guzhangian
Key events in the Cambrian
view • discuss •
-550 —
–
-540 —
–
-530 —
–
-520 —
–
-510 —
–
-500 —
–
-490 —
–
Stratigraphic scale of the ICS subdivisions and Precambrian/Cambrian boundary.
The Guzhangian is an uppermost stage of the 3rd 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.