Geochronological constraint on the Cambrian Chengjiang biota, South China

  title={Geochronological constraint on the Cambrian Chengjiang biota, South China},
  author={Chuan Yang and Xian‐Hua Li and Maoyan Zhu and Daniel J. Condon and Jun‐yuan Chen},
  journal={Journal of the Geological Society},
  pages={659 - 666}
The Cambrian Chengjiang biota of South China provides compelling fossil evidence for the rapid appearance of metazoan phyla in Earth history (the ‘Cambrian explosion’). However, the timing of the Chengjiang biota is poorly constrained owing to lack of datable rock materials within the Maotianshan Shale that yields the fossils. Here we integrate secondary ion mass spectrometry (SIMS) and chemical ablation isotope dilution thermal ionization mass spectrometry (CA-ID-TIMS) U–Pb analyses of… 

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