Age of Neoproterozoic bilatarian body and trace fossils, White Sea, Russia: implications for metazoan evolution.

@article{Martin2000AgeON,
  title={Age of Neoproterozoic bilatarian body and trace fossils, White Sea, Russia: implications for metazoan evolution.},
  author={M. W. Martin and Dmitriy V. Grazhdankin and Samuel A. Bowring and D. A. D. Evans and Mikhail A. Fedonkin and Joseph L. Kirschvink},
  journal={Science},
  year={2000},
  volume={288 5467},
  pages={
          841-5
        }
}
A uranium-lead zircon age for a volcanic ash interstratified with fossil-bearing, shallow marine siliciclastic rocks in the Zimnie Gory section of the White Sea region indicates that a diverse assemblage of body and trace fossils occurred before 555.3 +/- 0.3 million years ago. This age is a minimum for the oldest well-documented triploblastic bilaterian Kimberella. It also makes co-occurring trace fossils the oldest that are reliably dated. This determination of age implies that there is no… 
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