Re: Terramegathermy in the Time of the Titans (not so long...)

["Tim Williams" <twilliams_alpha@hotmail.com>]

ptnorton wrote:

> We do have extensive, monospecific ceratopsian and hadrosaurian bonebeds 
> (in
> the thousands of individuals) with individuals from all age classes.  This
> isn't 'direct' evidence for mass migration, but I'd be interested in 
> hearing
> a behavior mechanism other than that which could explain it.


Herding.

What could you find in a single monospecific bone bed that would indicate 
that the herd actually *moved* anywhere - such as vast distances across 
North America?


Tim


------------------------------------------------------------

Timothy J. Williams

USDA/ARS Researcher
Agronomy Hall
Iowa State University
Ames IA 50014

Phone: 515 294 9233
Fax:   515 294 3163

_________________________________________________________________
Get your FREE download of MSN Explorer at http://explorer.msn.com