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In article <40880ec5@news.povray.org>, "St." <dot### [at] dot com> 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? ;-)
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/74220.h
tm>
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.
--
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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