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Plant Fossil Record Reflects Just Two Great Extinction Events – Open Access Paper
Cascales-Miñana, B., and C. J. Cleal, 2014, The
plant fossil record reflects just two great extinction
events. Terra Nova. vol. 26, no. 3, pp. 195–200.
http://onlinelibrary.wiley.com/doi/10.1111/ter.12086/full
http://onlinelibrary.wiley.com/doi/10.1111/ter.12086/pdf
The abstract states;
"Here we show that the plant fossil record in fact only
provides evidence of two mass taxonomic extinction
events, one through the Carboniferous-Permian
transition, the other during middle-late Permian times."
Another open access paper, which is about the Sudbury
Impact (Ontario, Canada), is;
Petrus, J. A., D. E. Ames, and B. S. Kamber, 2014, On
the track of the elusive sudbury impact: geochemical
evidence for a chondrite or comet bolide. Terra Nova.
DOI: 10.1111/ter.12125. Accepted Article
http://onlinelibrary.wiley.com/doi/10.1111/ter.12125/abstract
http://onlinelibrary.wiley.com/doi/10.1111/ter.12125/pdf
Yours,
Paul H.