Hey Darren,
Some of those white areas are located in the middle of the slice.
Those on the edge would be susciptable to terrestrial weathering but unless the middle had been exposed to the same conditions you'll maybe have to look for another cause.
Jerry Flaherty
----- Original Message ----- From: "Darren Garrison" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Thursday, April 05, 2007 2:19 PM
Subject: [meteorite-list] Odd meteorite


Just finished re-sanding this odd-looking NWA.  A 178 gram half-stone with
highly weathered exterior but filled with clean metal. Seems to be a breccia with angular fragments and possible melt pockets. Could the white areas be
terrestrial weathering?

http://webpages.charter.net/garrison6328/temp/
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