Neonereites uniserialis from c.600 Ma year old rocks in western Scotland and the emergence of animals

Journal of the Geological Society | January 1, 1998| | Copyright

M. D. BRASIER 1 & D. McILROY 2

Abstract: A chain of pellets (Neonereites uniserialis), usually attributed to a coelomate or pseudocoelomate metazoan, is described from the middle Dalradian Bonahaven Formation of western Scotland, in sandstones not far above the Port Askaig Tillite. This trail lies more than 8 km below U Pb zircon-dated Tayvallich lavas (595 +/- 4 Ma) and predates early deformation plus intrusion by granites at Ben Vuirich dated at 597 +/- 11 and 590 +/- 2 Ma. U Pb zircon chronology for early metazoan evolution suggests that this is the earliest putative evidence for ...

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