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Re: New date for Chicxulub?
The above claim that the data in support of a direct relationship between
the spherules and the iridium layer "doesn't make sense" seems much ado
Better yet: The GSA abstract doesn't mention any radiometric dating. So when
there are several spherule layers plus the boundary spread over 10 m, why
can't they all (except the lowest), including the boundary, be reworked?