I have not seen this in any of the normal sites.
I got it after (some digging) from an ocean technologies publication
Refined Ordovician timescale reveals no link between asteroid breakup and biodiversification
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5286199/
http://scholar.google.com/citations?vie ... 6ydRqryjwC
no link between asteroid breakup and biodiversification
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