Miaolingian


The Miaolingian is the third Series of the Cambrian period, and was formally named in 2018. It lasted from about to million years ago and is divided into 3 stages: the Wuliuan, the Drumian, and the Guzhangian. The Miaolingian is preceded by the unnamed Cambrian Series 2 and succeeded by the Furongian series.

Definition

The lower boundary of the Miaolingian has the same definition as that of the Wuliuan. This boundary was formally defined by the ICS in 2018.
A number of proposals for fossils and type sections were made. The most promising fossil markers were seen to be the respective first appearances of either trilobite species Ovatoryctocara granulata or Oryctocephalus indicus. Either species should have an age close to million years ago. The Miaolingian-Furongian boundary has the same definition as the Paibian stage. It is defined as the first appearance of Glyptagnostus reticulatus around million years ago.

Subdivision

The Miaolingian is subdivided into the following stages:
EpochStageAge
Furongian--
FurongianStage 10
FurongianJiangshanian
FurongianPaibian
Miaolingian--
MiaolingianGuzhangian
MiaolingianDrumian
MiaolingianWuliuan
Series 2--
Series 2Stage 4
Series 2Stage 3