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Re: extinction

Phil Bigelow wrote:

> To claim that the K-T boundary clay is everywhere a lag deposit is
> analogous to claiming that there was a world-wide catastrophic flood.
> (and we don't want to go there).

Why not go there?.  Major catastrophic flooding (though not as a single
event) could be expected to continue for quite some time after the
event.  Note that I'm not implying that the boundary clay is everywehre
a lag deposit; I'm adressing a somewhat different issue.