[meteorite-list] Sikhote/Campo regmaglypt size differences

[Mexicodoug]

Hi Geo,

Since regmaglypts are the result of airflow (and only when it travels 
relatively fast in sufficiently dense atmosphere), I would suggest that 
their sizes of regmaglypts are both proportional to the size of the 
piece when it is subject to the turbulence (requires piece to be moving 
fast) and possibly get smaller for pieces penetrating to the densest 
low atmosphere (Sikhote) where the turbulence is much greater. So, a 
smll piece penetrating far down at great speed, like a low altitude 
airburst coming off a large iron mass, will produce small, exquisite 
regmaglypts, while a higher bursting, larger pieces will produce larger 
regmaglpts.

That said, don't be too sure that everything on the smaller Campos 
claimed to be a regmaglypt really is. If the piece is small, it's 
surface had been subjected to a proportionally greater amount of 
oxidation not to mention the smaller regs are probably long gone in 
many cases. Larger Sikhotes have larger regmaglypts if you've seen 
them...

Best wishes
Doug


-----Original Message-----
From: GeoZay at aol.com
To: meteorite-list at meteoritecentral.com
Sent: Sun, 7 Jun 2009 10:28 am
Subject: [meteorite-list] Sikhote/Campo regmaglypt size differences



I was wondering if anyone know why the regmaglypts (thumbprints) for
Sikhote-alins seem to be smaller than those found on Campo del Cielos? 
Perhaps
velocity, entry size, atmospheric duration exposure, structure, 
something
else? Any educated guesses? Any non-educated guesses? :O)
GeoZay

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