[meteorite-list] quarz and fossils

From: mafer_at_domafer.com <mafer_at_meteoritecentral.com>
Date: Thu Apr 22 09:53:32 2004
Message-ID: <023c01c29a5d$264b4ba0$6401a8c0_at_vs.shawcable.net>

Hi Yousef and list

Sure its possible to have quartz crystals that have grown in the same rock
as a fossil is found. Popular theory holds that quartz xtals grow from
saturated fluids, so if the rock and fossil were subjected to water
infiltration at some point, and the water contained silica in solution, if
there was a "budding" nucleus (any crystaline form regardless of size), then
a crystal would begin to form on that nucleus. Now, it is also possible that
small individual crystals were present on the surface where the fossil
finally rested and became part of the matrix along with the fossil. As long
as metamorphism hasn't occured, which would alter the fossil, these are you
most likely choices. Under metamorphism, you'd see any number of crystals of
many rock species develope.
Mark
----- Original Message -----
From: M Yousef <diamondmeteor_at_hotmail.com>
To: <meteorite-list_at_meteoritecentral.com>
Sent: Monday, December 02, 2002 11:31 AM
Subject: [meteorite-list] quarz and fossils


>
> Dear All,,,
> so long I have not posted anything to the list. I am sure you were better
> off me, but I have a small Q:
> is it possible to have large (few mm) single-crystalline quartz together
> with fossils in the same rock?
>
> see those high quality pictures for example:
>
> http://AlifYaa.com/mf/mf.htm
>
> All The Best
>
> Yousef
> ----------------------------------------------
>
>
>
>
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Received on Mon 02 Dec 2002 06:47:15 PM PST