There is a new paper published in the November 2009 issue of Geology that argues that the Sudbury Impact in Canada ended the creation of Banded Iron Formations during the Precambrian.
The paper is Slack, J. F. and W. F. Cannon, 2009, Extraterrestrial demise of banded iron formations 1.85 billion years ago. Geology. vol. 37, no. 11, pp. 1011-1014, doi:10.1130/G30259A.1 http://geology.gsapubs.org/content/37/11/1011.abstract Previous Geological Society of America Meeting abstracts can be found at: http://gsa.confex.com/gsa/2009AM/finalprogram/abstract_162145.htm and http://gsa.confex.com/gsa/2008AM/finalprogram/abstract_146662.htm Other web pages: Banded iron formation http://en.wikipedia.org/wiki/Banded_iron_formation Banded Iron Formation http://jersey.uoregon.edu/~mstrick/RogueComCollege/RCC_Lectures/Banded_Iron.html Geologic evidence for major environmental change http://tiny.cc/BandedIronClimate http://academic.udayton.edu/MichaelSandy/Global%20warming%20powerpoints/Geologic%20evidence%20for%20global%20change.ppt Yours, Paul H. ______________________________________________ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
