Wuliuan
Geologic time period
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 International Commission on Stratigraphy in 2018. Wikipedia
Occurred: 509 million years ago - 504.5 million years ago
Epoch: Miaolingian
Lower GSSP ratified: 2018
Upper boundary GSSP: Drumian section, Wheeler Shale, Utah, U.S.A. 39°30′42″N 112°59′29″W / 39.5117°N 112.9915°W
Upper GSSP ratified: 2006