Geologic Time Scale | Cambrian Period | Trick to learn Periods | Geology | Geography |UPSC | CSIR
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Prof Shankar Moderator. Dr O N Bhargava, Prof Biyani, Dr Ritesh Arya, Himalaya Geoheritage 31 May 20
The Wuliuan stage is the fifth stage of the Cambrian, and the first stage of the Miaolingian Series of the Cambrian. It was formally defined by the ICS in 2018.
Its base is defined by the first appearance of the trilobite species Oryctocephalus indicus; it ends with the beginning of the Drumian stage, marked by the first appearance of the trilobite Ptychagnostus atavus around 504.5 million years ago.
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