[meteorite-list] moldavite splashforms w/ artifacts. Inquiry?

From: E.L. Jones <jonee_at_meteoritecentral.com>
Date: Thu Apr 22 10:14:08 2004
Message-ID: <3EADA75B.8050400_at_epix.net>

Ok Sterling, I agree that the two (now three if you count Michael
Blood's) specimens show an unpitted interior plastic surface while the
external surface is pitted. This doesn't rule out aerodynamic pitting
but tends to discount post landing etching. BUT.......

As to pitting occurances, look at the Georgiasites which show no pitting
(if I recall correctly). At this point, I am not inclined to believe
that soil content in the separate fields can be discounted but might
work in tandem with other effects. The diffrences in terrestrial ages
might account for a different rate of weathering in given soil. Season
cycles might also play a part.

I don't see this hedgehog form in any other occurrence. This makes me
think a third specific effect may be acting on the moldavites in
particular. As to moldivites,if the form was caused by surface impact,
what would you surmise the impact surface was that allowed
stalactite-like, fingers? Surely not snow, one would expect intant
chilling.

I was pondering a third effect; The Thaw-Freeze cycle. This field, and
the rare tektite occurance from Tibet, are the two fields that lie in
heavy winter climates. Granted the Tibetan stones don't show moldavites
hedgehog forms but, it are also in a cold desert climate. Tektite glass
being very dry, would weather more slowly than common minerals near the
surface..one would think.

Thoughts?
Elton
Received on Mon 28 Apr 2003 06:12:43 PM PDT