[meteorite-list] Watson Australia image

From: joseph_town_at_att.net <joseph_town_at_meteoritecentral.com>
Date: Tue May 16 00:09:35 2006
Message-ID: <051620060351.25899.44694C480001E8560000652B21604666480299019BA1089F0A9C0106_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 Are there any other published or unpublished theories as to its history?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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Received on Mon 15 May 2006 11:51:37 PM PDT