| Literature DB >> 10797002 |
M W Martin1, D V Grazhdankin, S A Bowring, D A Evans, M A Fedonkin, J L Kirschvink.
Abstract
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 simple relation between Ediacaran diversity and the carbon isotopic composition of Neoproterozoic seawater.Entities:
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Year: 2000 PMID： 10797002 DOI： 10.1126/science.288.5467.841
Source DB: PubMed Journal: Science ISSN： 0036-8075 Impact factor: 47.728