[meteorite-list] Stones partly burried in the dessert sand

From: E. L. Jones <jonee_at_meteoritecentral.com>
Date: Thu Apr 22 10:31:10 2004
Message-ID: <406DCC82.9020500_at_epix.net>

As to oxide coloration, I have been recently reading over the research
on the Triassic sandstone "red beds" which were laid down around the
time of the last Euro-Aftican-North American rift. Consequently the
same formation has exposures in southwest Europe, Morocco, and The north
eastern US. Analysis shows that iron oxide in concentrations as low as
.1 %(one tenth of one percent) are sufficent to give these beds their
deep red color.

Regards,
Elton

Michel Franco wrote:

> Desert sand is not chemicaly aggressive. Desert sand is almost pure
> silica ( Si O2). the color of the sand is given by oxydes in very
> small proportions. Often iron oxydes.
>
Received on Fri 02 Apr 2004 03:26:42 PM PST