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Re: MRI and dino eggs, etc. Murdoch
Neil, How about saturating the fossil eggs with water in a pressure
chamber. If someone wants to try it, I am in Boca
Raton, FL, I cound put such an egg in our chamber and decompress it
slowly, returning the egg double ziplocked to hold the saturation. We
dont have an MRI on campus but I suspect a local MRI place might
cooperate; however I would prefer someone with more knowledge of the
technique to monitor it.
Ray McAllister, Prof (Emeritus) Ocean Eng., FAU, Boca Raton, FL 33064
Diving Dinosaur, Geologist/Oceanographer/Ocean Engineer, 43 years SCUBA
email@example.com (305) 426-0808, Author Diving Locations, Boynton/Dania
On Fri, 10 Feb 1995, NEIL CLARK wrote:
> > As I stated before, all of the techniques have not been successful at
> > demonstrating EMBRYOS within eggs. I am aware that the shell
> shows up
> > 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
> CT of
> > 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
> thick so
> > 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.
> Neil Clark
> Curator of Palaeontology
> Hunterian Museum
> University of Glasgow
> email: NCLARK@museum.gla.ac.uk
> Mountains are found in erogenous zones.
> (Geological Howlers - ed. WDI Rolfe)