[meteorite-list] xenolithic breccia's?

From: Dawn & Gerald Flaherty <grf2_at_meteoritecentral.com>
Date: Mon Jul 11 22:02:19 2005
Message-ID: <049401c58683$833232b0$6502a8c0_at_GerryLaptop>

Thank you Jeff, not your average light reading but definitely appreciated.
Jerry Flaherty
----- Original Message -----
From: "Jeff Grossman" <jgrossman_at_usgs.gov>
To: <meteorite-list_at_meteoritecentral.com>
Sent: Monday, July 11, 2005 8:19 AM
Subject: Re: [meteorite-list] xenolithic breccia's?


> Some of you may enjoy reading this document on the subject of nomenclature
> of impactites:
>
> http://www.bgs.ac.uk/scmr/docs/paper_12/scmr_paper_12_1.pdf
>
> jeff
>
> At 04:42 AM 7/11/2005, Jeff Kuyken wrote:
> >Maybe this will help but I'm not sure that it works for all examples. I
> >think this is something that came from the list a few years back back I
> >can't remember who posted it. If you're out there... speak up! ;-)
> >
> >
> >Genomict - A mixing of different petrologic stages of same composition
(Eg.
> >L3.8 and L6)
> >
> >Monomict - A mixing of the same textures and compositions. (Eg. L6 with
L6)
> >
> >Polymict - A mixing of different textures but the same compositions (Eg.
L5
> >light with L6 dark)
> >
> >Regolith - Mixing of different compositions and/or petrologic stages with
a
> >fine matrix at the surface of an asteroid, or moon, etc. Measurement of
> >solar radiation is involved to show surface exposure implying multiple
> >events at surface. (Eg. H3-6)
> >
> >
> >All here: http://www.meteorites.com.au/glossary.html
> >
> >And I guess Xenoliths would be something like "clasts or inclusions which
> >are unrelated to the host matrix/material".
> >
> >Cheers,
> >
> >Jeff Kuyken
> >I.M.C.A. #3085
> >www.meteorites.com.au
> >
> >
> >
> >----- Original Message -----
> >From: Norm Lehrman
> >To: Walter Branch ; met list
> >Sent: Monday, July 11, 2005 12:04 PM
> >Subject: Re: [meteorite-list] xenolithic breccia's?
> >
> >
> >All,
> >
> >Maybe someone can elucidate on the terms specifically
> >as they are used in meteorites, but in geology
> >"polymict" implies varied clast composition ("poly" =
> >many), while "xenolith" (= foreign rock), implies
> >clasts from an external source.
> >
> >Cheers,
> >Norm
> >(http://tektitesource.com)
> >
> >--- Walter Branch <branchw_at_bellsouth.net> wrote:
> >
> > > What is the difference between a polymict breccia
> > > and xenolithic breccia?
> > >
> > > -Walter Branch
> > >
> > >
> > > ---------------------------------------------
> > > ----- Original Message -----
> > > From: "Darren Garrison" <cynapse_at_charter.net>
> > > To: "met list" <meteorite-list_at_meteoritecentral.com>
> > > Sent: Sunday, July 10, 2005 9:06 PM
> > > Subject: Re: [meteorite-list] xenolithic breccia's?
> > >
> > >
> > > On Sun, 10 Jul 2005 17:28:34 -0700, "Tom Knudson"
> > > <peregrineflier_at_npgcable.com> wrote:
> > >
> > > >Hello good people of the list!!! Sure is slow
> > > today!!! So, what is a
> > > >xenolithic breccia? What meteorites are considered
> > > a xenolithic breccia?
> > >
> > > http://en.wikipedia.org/wiki/Xenolith
> > >
> > > http://en.wikipedia.org/wiki/Breccia
> > >
> > >
> > > >On Google, I only find Ghubara, but that can't be
> > > the only one.
> > >
> > > One of my favorites was just mentioned a few days
> > > back-- NWA 3119
> > >
> > > http://www.meteorites.com.au/features/nwa3119.html
> > >
> > > and my much more modest piece
> > >
> > >
> >http://webpages.charter.net/garrison6328/nwa3119_both.jpg
> > > ______________________________________________
> > > Meteorite-list mailing list
> > > Meteorite-list_at_meteoritecentral.com
> > >
> >http://six.pairlist.net/mailman/listinfo/meteorite-list
> > >
> > > ______________________________________________
> > > Meteorite-list mailing list
> > > Meteorite-list_at_meteoritecentral.com
> > >
> >http://six.pairlist.net/mailman/listinfo/meteorite-list
> > >
> >
> >______________________________________________
> >Meteorite-list mailing list
> >Meteorite-list_at_meteoritecentral.com
> >http://six.pairlist.net/mailman/listinfo/meteorite-list
> >
> >______________________________________________
> >Meteorite-list mailing list
> >Meteorite-list_at_meteoritecentral.com
> >http://six.pairlist.net/mailman/listinfo/meteorite-list
>
> Dr. Jeffrey N. Grossman phone: (703) 648-6184
> US Geological Survey fax: (703) 648-6383
> 954 National Center
> Reston, VA 20192, USA
>
>
> ______________________________________________
> Meteorite-list mailing list
> Meteorite-list_at_meteoritecentral.com
> http://six.pairlist.net/mailman/listinfo/meteorite-list
>
Received on Mon 11 Jul 2005 09:46:23 PM PDT