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Dr. Lyle Nelson publishes new dates for Cambrian Explosion

Dr. Lyle Nelson in the Department of Earth Sciences at Carleton University has published an article in PNAS (Proceedings of the National Academy of Sciences) with new dates for the Cambrian Explosion:

Geochronology of the Cambrian Period
The Ediacaran-Cambrian boundary marks the beginning of intense biological diversification of animal life, an evolutionary time interval called the Cambrian explosion. To uncover the geochronology of the Cambrian explosion, Lyle Nelson et al. obtained zircon uranium-lead dates for trace fossil biostratigraphy and carbon isotope chemostratigraphy from the lower Wood Canyon Formation in Nevada. The authors' analysis establishes an age for this boundary that is younger than previously thought. 

For the full article, please click "Cambrian explosion condensed: High-precision geochronology of the lower Wood Canyon Formation, Nevada


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