"Christopher James Huff" <cja### [at] earthlinknet> wrote in message
news:cjameshuff-4EC0B0.15182322042004@news.povray.org...
> In article <40880ec5@news.povray.org>, "St." <dot### [at] dotcom> wrote:
>
> >    Glass beads?  Seriously, is this a known fact? I can see that
it
> > could be, because sand (silica) as we know it, will form into the
same
> > glass beads under intense heat here on earth.
>
> We've been there, remember? ;-)

    Heh, yes, I think I was about 6-7yo, cross-legged, wearing grey
shorts, grey socks, in our sports-hall, watching a black and white TV
when they touched down. A nice memory.  :)


> There are some micrographs on the net of samples brought back by the
> Apollo missions...here's a page with some good ones from Apollo 17:
>
<http://www.union.edu/PUBLIC/GEODEPT/COURSES/petrology/moon_rocks/7422
0.h
> tm>

    Aargh! 404 even when pasting the URL directly.


> Similar glass beads are found here on Earth around volcanos and
impact
> craters. Impact-melted rock or magma gets blasted into the sky and
> solidifies into more or less spherical shapes before it lands.

 Yes, I used to walk our defunct railway lines when I was younger, and
believe that I found samples of magma - I'm not sure, but that was
what I was told. It was a dark substance with a golden
sheen/iridescence to it, but it definitely looked molten and was round
in shape when solidified. It was very 'glassy', and would break in
half very cleanly, leaving a very reflective surface. I don't know if
it was magma, it could have been anything native I guess, but I
wouldn't know what.

   I found many shell fossils too, if that's a clue?

   ~Steve~


>
> -- 
> Christopher James Huff <cja### [at] earthlinknet>
> http://home.earthlink.net/~cjameshuff/
> POV-Ray TAG: <chr### [at] tagpovrayorg>
> http://tag.povray.org/

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