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Re: Sauropod Necks



in the Jobaria mount, some research went into finding the center of mass
on an elephant, and then (somehow) Sereno et all went on to applying it
to Jobaria.

But then Jobaria was a teeny little sauropod.

-Betty

Stanley Friesen wrote:
> 
> At 05:08 PM 7/10/00 -0700, Matthew Bonnan wrote:
> >To continue an old thread further, a couple of points:
> >Questions that need to be addressed include: how much rotation is possible
> >of the femur in the hip socket of a sauropod? what muscles are involved
> >and what landmarks can be used to verify that these muscle groups are
> >indeed doing what we suggest? what effect does the large tail muscle
> >(caudofemoralis longus) that pulls the femur back have on a rearing
> >sauropod? did sauropods bend their knees when rearing, and if so, what
> >sort of strain and stress did this send through their pelvis, hindlimb,
> >and foot? sauropods have an open hip socket and a cylindrical femoral
> >head: how was force transmitted through this during normal weight bearing,
> >and could the pelvis and hindlimb handle rearing up?  to name but a few
> >that come to mind!
> 
> Not to mention issues of balance.  Is the center of mass truly positioned
> over the fulcrum point?

-- 
Flying Goat Graphics
http://www.flyinggoat.com
(Society of Vertebrate Paleontology member)
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