[meteorite-list] How to tell IMB Gaos from normal

[PolandMET]

> Hello Guys,
>
> Having just got more Gao's  in, I am curious what external features on 
> Gaos
> would indicate that a particular  specimen has the Impact Melt Breccia 
> features
> inside?
>
> I don't want to cut  all of them up just to find a few (or maybe none) 
> have
> the great  flow.
>
> All input, especially photos, is greatly appreciated.
>
> Steve  Arnold
> Arkansas

Hey Steve.
IMB Gaos have different shape and crust if melt material is on external 
surface. You will see difference also on uncleaned specimens. They have 
sharp edges and also sometimes they dont have crust on IMB material becouse 
it is too glosy to hold it on place. But from my observation, if oriented 
specimens are rare in Gao, then IMB specimens are triple as rare as 
oriented. You can see some of the IMB samples on my Gao-Guenie page

-----[ MARCIN CIMALA ]-----[ I.M.C.A.#3667 ]-----
http://www.Meteoryty.pl             marcin(at)meteoryty.pl
http://www.PolandMET.com       marcin(at)meteorite.pl
http://www.Gao-Guenie.com      GSM: +48 (793) kosmos
--------[ Member of Polish Meteoritical Society ]--------