[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Re: MRI and dino eggs, etc. Murdoch
> As I stated before, all of the techniques have not been successful at
> demonstrating EMBRYOS within eggs. I am aware that the shell
> nicely in CT, X-ray, MRI, etc., but that was not the point I was
> discussing. The calcite of the shell is usually the original shell, so
> has a different density than the surrounding and infilled matrix. This
> morning Karl Hirsh told me of yet another experiment of his using
> a fossil egg known to have bones (seen on the broken edge). The
> were again negative. The egg was small, about 5 cm wide, 1 cm
> there was no difficulty with penetration by the X-rays.
We have probable evidence for embryonic remains inside an egg
using CT-scanning. The problem is that I am not allowed to use that
time honoured geological technique of 'hitting it with a hammer'. :~-(
I am about to produce a 3-D image of the results and then write it up.
Some eggs are better for CT-scanning than others. If there is too
much calcite cement inside the egg then you won't get a useful
image. I have a turtle egg that has an embryo inside it, but I can't see
a thing because of the diagenetic/taphonomic mineralisation.
As for MR.....I have thought of saturating the egg with water. This
woul provide an image of the porosity and hence perhaps.....the
embryonic remains??? Maybe someone has the facility to do this?
Please get on to some one with one of the red sediment enclosed
bun-shaped eggs and try it out.
Curator of Palaeontology
University of Glasgow
Mountains are found in erogenous zones.
(Geological Howlers - ed. WDI Rolfe)