Why this rock is probably not a meteorite:
No kind of meteorite is this spherical (see no.
001), this white, and this knobby.
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What is it?
I have no idea. It appears to be man made.
June 2004: Paul V. Heinrich of the Louisiana Geological Survey offers
this: "It looks a lot like Precambrian iron oxide nodules, pseudomorphed
after pyrite, that I am studying, which came from the pyrophyllite
(wonderstone) mines nears Ottosdal, South Africa." His second
hypothesis is that it "is a large Moqui
Marble type of iron oxide nodule developed in cross-bedded sandstone.
In this case, the ribbing reflects variations in the distance from
the central axis of the nodule that cementation has occurred because
of differences in the permeability of individual cross-beds."
Thanks Paul.
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