[meteorite-list] Watson Australia image

[joseph_town at att.net]

That is an amazing pattern. It looks like a satellite image of an unplanned urban area.

Bill


 -------------- Original message ----------------------
From: Elton Jones <jonee at epix.net>
> Hello Matt,
> 
> Your message was lost in cyberspace a while so my question is going back 
> a few weeks. 
> 
> This is an amazing meteorite with a some complicated history.  Watson 
> clearly looks disrupted-- in chunks no less-- the orientations of the 
> crystal latices have been jumbled. Some of those look like they have 
> been remixed and regrown briefly. Others are too course to have grown in 
> a small body in a short time, suggesting they are original.  
> Conventional wisdom is that a melt would cause the taenite and kamacite 
> to remix.  However this would not necessarily be so as this specimen 
> seems to indicate.  Seems in a full remelt, the lattices would be 
> realigned throughout the mass and of consistent size.    I see several 
> bent laminae and near the tip of the chondritic inclusion are intermixed 
> lobes, which suggest to me that this deformation was produced by an 
> extrusion/ductile process versus a melt.  This is remarkable in that a 
> chondritic "slug" was embedded in the iron.  So I then mused to myself  
> how do you shoot  a slug of H-chondritic meteorite into an iron mass and 
> fail to turn it into glass.  I don't think you can.  I surmise this is a 
> case of the iron parent deforming over/through the silicate parent and 
> this slug was pinched off as the iron barreled through the silicate, 
> folding in behind it.
> 
> Questions for you or the list. 
> Are there any other published or unpublished theories as to its history?
> Has anyone ever discussed the occurrence of a "brecciated" iron?
> Are there any other irons that have a similar brecciated appearance?
> and in the "How many angels can dance on the head of a pin?" Category...
>     Does this H-clast meet the criteria to be a separatley named meteorite?
> 
> Thanks for posting I find it facinating.
> Elton
> 
> Matt Morgan wrote:
> 
> > Some of you who collect irons may enjoy this pic of Watson, Australia, 
> > type IIE with an H-chondrite clast.
> > This piece came from Robert Haag collection and was just refinished.  
> > It is a really interesting meteorite!
> > Matt Morgan
> >
> > <http://www.mhmeteorites.com/images/watson.jpg>
> >
> > Close-up of clast and etch.
> > <http://www.mhmeteorites.com/images/watson_close.jpg>
> >
> 
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