Re: Some data (was Re: Herbivore protection)

[Stanley Friesen <sarima@ix.netcom.com>]

At 08:32 AM 5/28/97 -0400, Thomas R. Holtz, Jr. wrote:
>...  Here are some the
>results (taken from Farlow, J.O. 1993.  ...
>
>1:10-1:13  Judith River Group, based on articulated specimens.
>1:5-1:6  Judith River Group, based on surface collected isolated 
>scrap.

Ack!  This is *heavily* biased towards theropods.

Theropods are *known* to routinely lose teeth. Most herbivorous dinosaurs,
as far as I can tell, wore their teeth to nothing.  As a result scraps
would contain a *large* excess of theropod teeth.

>1:23  Hell Creek Formation, based on surface collected isolated 
>scrap.

Hmm, odd.  Seems low for scrap.

>1:22-1:511 (mean 1:115) Judith River Group, based on screen washed 
>samples.
>

Overall, it looks like a ratio of between 1:10 and 1:25 seems likely.

--------------
May the peace of God be with you.         sarima@ix.netcom.com
                                          sfriesen@netlock.com