Fwd: Re: Tyrannosaurus - scavenger, my craggy butte

["Jaime A. Headden" <qilongia@yahoo.com>]

--- "Jaime A. Headden" <qilongia@yahoo.com> wrote:
> Date: Thu, 19 Feb 2004 16:07:55 -0800 (PST)
> From: "Jaime A. Headden" <qilongia@yahoo.com>
> Subject: Re: Tyrannosaurus - scavenger, my craggy butte
> To: uwrk2@yahoo.com
> 
> Tim Donovan (uwrk2@yahoo.com) wrote:
> 
> <Hadrosaur tails were stiffined and held horizontally above the ground.
> It
> is possible that trampling affected only the dorsal caudal spines,
> without
> the ventral ones being forced to the ground and wrecked, especially if
> the
> proximal part of the tail bore the weight e.g. in a mating accident. I
> like the predation interpretation but I don't know if we can exclude
> trampling.>
> 
>   I think a reasonable expectation of means by which over half a single
> neural spine and the tips of the preceeding and following spines, with
> gouges in the spines, can be accounted for (especially in the middle of
> the tail, not near the proximal end) better by a means that tears out
> the
> spines, rather than being crushed (a condition that would show
> fracturing,
> and likley given the size and weight of a leg or body during anything
> that
> would crush the tail, more expansive damgage than a single neural spine
> and the tips of two others), especially given the absence of the missing
> tips (crushing leaves the remains IN the body, not removes them).
> 
> =====
> Jaime A. Headden
> 
>   Little steps are often the hardest to take.  We are too used to making
> leaps in the face of adversity, that a simple skip is so hard to do.  We
> should all learn to walk soft, walk small, see the world around us
> rather than zoom by it.
> 
> "Innocent, unbiased observation is a myth." --- P.B. Medawar (1969)
> 
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=====
Jaime A. Headden

  Little steps are often the hardest to take.  We are too used to making leaps 
in the face of adversity, that a simple skip is so hard to do.  We should all 
learn to walk soft, walk small, see the world around us rather than zoom by it.

"Innocent, unbiased observation is a myth." --- P.B. Medawar (1969)

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