Recent research indicates that acid oceans, not asteroid impacts, likely contributed to Earth’s worst mass extinction.
Go look at: Ancient Acidic Ocean a Killer by Emily Sohn, Discovery News, http://news.discovery.com/earth/ocean-acidification-110907.html Acid oceans helped fuel mass extinction by Alexandra Witze, Science News, Sept 5, 2011, http://www.sciencenews.org/view/generic/id/333995/title/Acid_oceans_helped_fuel_mass_extinction The paper is: Montenegro, A., P. Spence, K. J. Meissner, M. Eby, M. J. Melchin, and S. T. Johnston, 2011, Climate simulations of the Permian-Triassic boundary: Ocean acidification and the extinction event, Paleoceanography, 26, PA3207, doi:10.1029/2010PA002058. Abstract at http://www.agu.org/pubs/crossref/2011/2010PA002058.shtml Dr. Peter Ward has published a book that discusses decades of published research, which he has conducted into the Permian- Triassic mass extinctions. It is: Ward, P. D., 2008, Under a Green Sky. Harper-Collins Books. 242 pp. ISBN 978-0-06-163163-4 It is an excellent, entertaining, and thoughtful book about the Permian-Triassic mass extinctions that is well written for the lay public. I highly recommend it. Related articled are: Earth science: Lethal volcanism by Paul B. Wignall, Nature. vol. 477, no. 7364, pp. 285–286. http://www.nature.com/nature/journal/v477/n7364/full/477285a.html Large Igneous Provinces and Mass Extinctions by , David Bressan, Scientific American, Sept. 16, 2011, http://blogs.scientificamerican.com/history-of-geology/2011/09/16/large-igneous-provinces-and-mass-extinctions/ Best wishes, Paul H. ______________________________________________ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
