Thanks to everybody for your interest and your kind comments on the photo of the Taousz/Breja stone which Michael kindly posted. Much appreciated. Carl, the degree of brown vs black in the color of the fusion crust of a freshly fallen chondrite is a function mainly of the magnetite (FeO·Fe2O3) content in the crust. The oxide composition in turn is basically controlled by the supply of oxygen during the formation of the crust. Thus, trailing faces, which formed in near vacuum, often show a rich brown instead of the common dull black. A textbook example is the little oriented Buzzard Coulee pictured here: http://www.meteorite-recon.com/en/Meteorite_fusion_crust_2.htm Cheers Svend
http://www.rocksfromspace.org/taousz.html [email protected] hat am 6. Januar 2012 um 16:39 geschrieben: > Michael, List, > Fabulous photo. > Any explanation as to why the fusion crust is soooooo brown on a fresh fall? > Anyone! > Thanks, > Carl > meteoritemax > -- > Cheers > > ---- ROCKS FROM SPACE <[email protected]> wrote: > > http://www.rocksfromspace.org/taousz.html > > ______________________________________________ > > HAPPY HOLIDAYS!! > > Visit the Archives at > > http://www.meteoritecentral.com/mailing-list-archives.html > > Meteorite-list mailing list > > [email protected] > > http://six.pairlist.net/mailman/listinfo/meteorite-list > ______________________________________________ > HAPPY HOLIDAYS!! > Visit the Archives at > http://www.meteoritecentral.com/mailing-list-archives.html > Meteorite-list mailing list > [email protected] > http://six.pairlist.net/mailman/listinfo/meteorite-list ______________________________________________ HAPPY HOLIDAYS!! Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
