
doi: 10.1038/294074a0
The microfossil assemblages described here are preserved in cherts from the Yunnan Province, south-west China. They are the first chert-facies microfossils to be discovered in the Wangjiawan and Meishucun stratigraphical sequences which are regarded by the International Cambrian/Precambrian Boundary Working Group1 as possible ‘candidates’ for the stratotype section of the Cambrian/Precambrian boundary.
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