Fwd: RE: Saurolophus stratigraphy

["Tim Donovan" <msdonovan66@hotmail.com>]

> To: "Tim Donovan
> Subject: RE: Saurolophus stratigraphy

> Saurolophus is known with confidence from Units 3&4.  So far there is no 
> evidence from historical records or our data for it occurring in Units 1 or 
> 2.

  The absence of Saurolophus in Campanian strata argues against the old 
suggestion that the Nemegt could be as old as late Campanian.


> In terms of hadrosaurs, Unit 1 has so far produced only the hadrosaurine 
> Edmontosaurus.
>
> We are currently unsure how low the stratigraphic range of Hypacrosaurus 
> goes.  It is certainly known from units 3 and 4, but tentative indications 
> are that it extends down into Unit 2.
>
> The Albertosaurus bonebed (n=13; July 2002) occurs at the very top of Unit 
> 4...previously we had placed it at the base of Unit 5 but further field 
> checks revealed that this was an error.  The mni count will probably 
> continue to grow as Phil Currie continues to excavate the site.  I have yet 
> to confirm with Phil the current mni tally as of Sept. 2002.
>
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