Re: Fastovsky vs Archibald

[Phil Bigelow <bigelowp@juno.com>]

On Sun, 19 Jun 2005 18:16:47 -0700 (PDT) GUY LEAHY
<xrciseguy@prodigy.net> writes:
> An additional complicating factor is that there is a change in 
> depositional environments within the Hell Creek.  The lower part is 
> predominantly sandstones, with the upper part consisting primarily 
> of paleosols.


That's true, and the lower channeled facies tend to contain a concentrate
of polychronous taxa (a reworked mishmash of skeletal remains from
earlier Hell Creek times), whereas elements collected in the upper
paleosols have a greater probability of representing truely coeval taxa,
albeit in fewer numbers compared to the channeled facies.


<pb>
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