[meteorite-list] xenolithic breccia's?

From: Jeff Kuyken <info_at_meteoritecentral.com>
Date: Mon Jul 11 04:42:13 2005
Message-ID: <005e01c585f4$6ca982d0$cb558b90_at_mandin4f89ypwu>

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
Received on Mon 11 Jul 2005 04:42:04 AM PDT