Found this; Long read and the second word in 'Significance' says it all.
Impasse.
A unifying model for the accretion of chondrules and matrix | PNAS
https://www.pnas.org/doi/full/10.1073/pnas.1907592116.
Best, John L.
__
Meteorite-list mailing
...@yahoo.com; meteorite-list@meteoritecentral.com
Sent: Friday, October 02, 2009 1:51 PM
Subject: Re: [meteorite-list] Chondrule formation
Hello All:
I had a thought:
It seems to me that chondrules are prevalent in meteorites blasted from
asteroidal bodies and not from planetary bodies
Hi all -
We don't know crap... Hey!, who stole my line?
But that's okay, I can come up with another one:
We don't know crap about the impact hazard,
and NASA senior managers know less than that.
E.P. Grondine
Man and Impact in the Americas
To: meteorite-list@meteoritecentral.com
Subject: Re: [meteorite-list] Chondrule formation
Hi all -
We don't know crap... Hey!, who stole my line?
But that's okay, I can come up with another one:
We don't know crap about the impact hazard,
and NASA senior managers know less than that.
E.P
To: epgrond...@yahoo.com=3b meteorite-list@meteoritecentral.com
Date: Fri=2C 2 Oct 2009 13:51:29 -0700
Subject: Re: [meteorite-list] Chondrule formation
Hello All:
I had a thought:
It seems to me that chondrules are prevalent in meteorites blasted from a=
steroidal bodies and not from planetary
-
Von: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Im Auftrag von
[EMAIL PROTECTED]
Gesendet: Freitag, 18. April 2008 06:05
An: meteorite-list@meteoritecentral.com
Betreff: [meteorite-list] Chondrule close up!
Hi chondrule fan list members, I wanted to share some micrographs of a
chondrule
On Fri, 18 Apr 2008 23:11:58 +0200, you wrote:
Folks!
There is only one word to say: WOW This chondrule is so awesome, if
you don't have seen this fantastic chondrule till now, you should write
Tom a short note. It's a truly must see.
Agreed, amazing chondrule-- in fact, it is a chon-drool.
.
Sterling K. Webb
---
- Original Message -
From: Darren Garrison [EMAIL PROTECTED]
To: meteorite-list@meteoritecentral.com
Sent: Friday, April 18, 2008 4:17 PM
Subject: Re: [meteorite-list] Chondrule close up
Hi chondrule fan list members, I wanted to share some micrographs of a
chondrule. The material is no big deal. (It is pending but it looks like it
will be L4/5.)
A chondrule? You have got to see these shots. They were taken in incident
(reflected) cross polarized light which, unlike
I like the way the smaller chondrule sits just outside the 'primary perimeter'
of the larger
chondrule in pic #1. Yet, it lies within the surrounding matrix of melt [is
melt right in this
case?]
Pic #2 is very cool. Where'd that chondrule go anyway??? :)
Gary
First is a chondrule with a
The list is slow so thought I'd throw out a couple of pictures of things I
found in a small chondrite I cut this afternoon.
Of course the pictures aren't even close to the quality shared by some, but
hopefully they are at least mildly interesting.
magnification is something around 40x
First
Phil, the second is my favorite! I looks like an armor with out the
chondrule. Just sitting there in the matrix!
Real cool! Thanks, Tom
In a message dated 2/2/2008 10:02:48 P.M. Central Standard Time,
[EMAIL PROTECTED] writes:
The list is slow so thought I'd throw out a couple of
Hi list, Sorry for this lame post. I recently received an email from a
list member that for some reason went to my spam folder. I accidentally hit
the
delete all button and I can't get it back at all. I never opened it and I
didn't see who it was from.
Please send it again if it was
Hi List, A very interesting post. It seems electrical discharge is being
seen as not likely for chondrule formation.
I have seen chondrules with many types of structures that seem to defy the
conventional view of shock wave formation. Some have intertwined tubular
features that resemble
For the full PDF file:
http://eprintweb.org/S/article/astro-ph/0712.0561
http://eprintweb.org/S/article/astro-ph/0712.0561
arXiv:0712.0561 (December 2007)
Exposing metal and silicate charges to electrical discharges: Did chondrules
form by nebular lightning?
Good morning list.A question that has had me puzzled
for along time has been,what causes chondrules to
become the color's they do.I have seen black,white
grey,and even some multi-color ones like chondrule
conglomerate.What is the scientific principle behind this.
Steve R.Arnold,chicago,Ill,Usa!!
I've copied the chondrule photos to an Angelfire account which, unlike my ISP's
free 20 MB of space, is ad-based, but I can't leave them on my ISP space long
term (because I often use the space for other things) and the Angelfire space
can be left indefinitely. So the annoying ad images aren't my
get a commission.)
Sterling K. Webb
--
- Original Message -
From: Darren Garrison [EMAIL PROTECTED]
To: meteorite-list@meteoritecentral.com
Sent: Saturday, October 20, 2007 12:29 PM
Subject: [meteorite-list] Chondrule photos
, October 20, 2007 12:58 AM
Subject: [meteorite-list] Chondrule photos
I've been making lots of photo with my new USB microscope, and had been
planning
to write up some descriptions of each of the chondrules before putting
them on
the web, but I came to accept that I don't know enough of the
physics
]
To: meteorite-list@meteoritecentral.com
Sent: Saturday, October 20, 2007 12:58 AM
Subject: [meteorite-list] Chondrule photos
I've been making lots of photo with my new USB microscope, and had been
planning
to write up some descriptions of each of the chondrules before putting
them on
the web
On Sat, 20 Oct 2007 22:12:31 -0400, you wrote:
Seriously, barring, breccia all so obvious. And the number of pics allow for
comparison. I really can learn something.
Darren, I know that these will be up for a limited time. About how long will
they be posted?
Well, as I mentioned, the photos
Super. I've got them in my favorites.
Jerry Flaherty
- Original Message -
From: Darren Garrison [EMAIL PROTECTED]
To: meteorite-list@meteoritecentral.com
Sent: Saturday, October 20, 2007 1:29 PM
Subject: [meteorite-list] Chondrule photos update
I've copied the chondrule photos
I've been making lots of photo with my new USB microscope, and had been planning
to write up some descriptions of each of the chondrules before putting them on
the web, but I came to accept that I don't know enough of the physics/chemestry
involved to come up with something new and meaningful
Very nice, Darren. I love chondrules. Chondrules Rule!! Thanks for
sharing them.
Dave
- Original Message -
From: Darren Garrison [EMAIL PROTECTED]
To: meteorite-list@meteoritecentral.com
Sent: Saturday, October 20, 2007 12:58 AM
Subject: [meteorite-list] Chondrule photos
I've
Hello John, Marcin, David and List,
John wrote: I snapped a few pictures to show this meteorite's texture and
variety.
http://www.johnkashuba.com/Pages/Meteorite%20Pages/Pictures/NWA4781CH3.htm
Thank you, John, for these wonderful snapshots!
John also wrote: This IS a fun rock. -- It surely
Hi List:
Thanks for your response to my questions. I never thought there were so many
unique minerals that only occur in outer space. Now I can amaze my friends
when they ask me.
Take a look at some pics of a grey-green rock I found. Could this be a
chondrule in it? Its album
Pete [EMAIL PROTECTED]; meteorite-list@meteoritecentral.com
Sent: Wednesday, October 25, 2006 2:52 PM
Subject: RE: Re : [meteorite-list] Chondrule formation mechanism (Info
Please)
I suppose you are correct. I suspect the iron flecks
in chondrites must be stellar relics.
The iron is formed
PM
Subject: RE: Re : [meteorite-list] Chondrule
formation mechanism (Info
Please)
I suppose you are correct. I suspect the iron
flecks
in chondrites must be stellar relics.
The iron is formed in the cores of all stars.
Nuclearly speaking it is the stablest of all
elements
(lowest
.
Jerry Flaherty
- Original Message -
From: Sterling K. Webb [EMAIL PROTECTED]
To: meteorite-list@meteoritecentral.com
Cc: E.P. Grondine [EMAIL PROTECTED]
Sent: Friday, October 27, 2006 2:30 AM
Subject: Re: Re : [meteorite-list] Chondrule formation mechanism (Info
Please)
Hi, Rob, Pete, Ed
. Grondine [EMAIL PROTECTED]
Subject: Re : [meteorite-list] Chondrule formation mechanism (Info Please)
Date: Tue, 24 Oct 2006 16:15:53 + (GMT)
Hi, all,
I am surprised that nobody evoked the theory following which chondrules were
formed in relatively very few privileged zones of space. They would
On Wed, 25 Oct 2006 11:52:23 -0400, you wrote:
If the heavy elements, such as nickel and iron, are created by a supernova,
and the chondrules are in theory formed much later during the future
dynamics of our solar system's nebula, would it be fair to say that the
metal flecks would be billions
: Re: RE: Re : [meteorite-list] Chondrule formation mechanism (Info
Please)
Date: Wed, 25 Oct 2006 12:55:53 -0400
On Wed, 25 Oct 2006 11:52:23 -0400, you wrote:
If the heavy elements, such as nickel and iron, are created by a
supernova,
and the chondrules are in theory formed much later during
PROTECTED]
CC: meteorite-list@meteoritecentral.com
Subject: Re: RE: Re : [meteorite-list] Chondrule formation mechanism (Info
Please)
Date: Wed, 25 Oct 2006 12:55:53 -0400
On Wed, 25 Oct 2006 11:52:23 -0400, you wrote:
If the heavy elements, such as nickel and iron, are created by a
supernova
. Grondine [EMAIL PROTECTED]
Subject: Re : [meteorite-list] Chondrule formation
mechanism (Info Please)
Date: Tue, 24 Oct 2006 16:15:53 + (GMT)
Hi, all,
I am surprised that nobody evoked the theory
following which chondrules were
formed in relatively very few privileged zones of
space
3:25 PM
Subject: Re: [meteorite-list] Chondrule formation
mechanism (Info Please)
Hi Sterling,
If the dates are right, the problem becomes how
did
that many identical atoms get together in one
place so
that the chondrules could form?
Since this question has
I like this theory very much. (I particularly like it
because it allows the structure to form the way i
described it)
Rob McC
--- Mr EMan [EMAIL PROTECTED] wrote:
I think crystal formation in a fluid preceded the
choundrule formation. Seems standard mineralogy and
crystalography answer
Hi Rob -
molecules of a feather flock together? why?
If they did, then say an initial detonation of our sun
could have been the heat which fused them together. I
think speculation on this kind of blast has been
bandied about much recently.
good hunting,
Ed
--- Rob McCafferty [EMAIL
-
From: Warin Roger
To: Sterling K. Webb ; meteorite-list@meteoritecentral.com
Cc: E.P. Grondine
Sent: Tuesday, October 24, 2006 11:15 AM
Subject: Re : [meteorite-list] Chondrule formation mechanism (Info Please)
Hi, all,
I am surprised that nobody evoked the theory following which
@meteoritecentral.com
Cc: E.P. Grondine
Sent: Tuesday, October 24, 2006 11:15 AM
Subject: Re : [meteorite-list] Chondrule formation mechanism (Info Please)
Hi, all,
I am surprised that nobody evoked the theory following which chondrules
were formed in relatively very few privileged zones of space
--- E.P. Grondine [EMAIL PROTECTED] wrote:
Hi Rob -
molecules of a feather flock together? why?
This is the most blatant speculation on my part and I
have not looked it up to check this (though to be
fair, I didn't make the comment above, I just like it)
but this is what I think and no
[EMAIL PROTECTED]
To: Sterling K. Webb
[EMAIL PROTECTED]
Sent: Monday, October 23, 2006 3:25 PM
Subject: Re: [meteorite-list] Chondrule formation
mechanism (Info Please)
Hi Sterling,
If the dates are right, the problem becomes how
did
that many identical atoms get together in one
--- E.P. Grondine [EMAIL PROTECTED] wrote:
The problem still remains what caused sufficient
number of atoms of the same type to be in the same
place at the same time to produce the crystals and
glasses observed.
I think crystal formation in a fluid preceded the
choundrule formation. Seems
Ed
Thanks for the reply. I'd really like to take a look
at any data but to help be more specific on my
requirements I'll give you an outline on my idea.
The appearance of the unaltered chondrites seems to
show that the outer rim of the chondrules are of a
significantly diferent structure to the
Hi Rob -
You noticed the contradiction in cooling periods as
well.
What I am thinking is that there was at least one
larger parent body which was disrupted about 3.9 Gya
(at time of LPBE). When this larger parent body was
disrupted, then the effervescent foaming that led
to some chondrules
PROTECTED]
To: meteorite-list@meteoritecentral.com
Sent: Sunday, October 22, 2006 10:24 AM
Subject: Re: [meteorite-list] Chondrule formation mechanism (Info Please)
Hi Rob -
You noticed the contradiction in cooling periods as
well.
What I am thinking is that there was at least one
larger parent
Right here on Earth, we have good demonstrations of effervescence in rocks.
Every time we get fire fountaining from one of our volcanoes, it is caused
by a large amount of gas dissolved under pressure at depth in the magma.
When the pressurized magma (now lava) reaches sufficiently shallow
Hi all -
I think I would be right in saying that the usual
mechanism proposed for chondrule formation is
precipitation at low temperatures over time.
But I am wondering: could chondrule formation be
linked to the release of pressure? Could it be like a
soda-pop, where when you take the cap off
On Sat, 21 Oct 2006 10:12:56 -0700 (PDT), you wrote:
I think I would be right in saying that the usual
mechanism proposed for chondrule formation is
precipitation at low temperatures over time.
No, actually it isn't. Chondrules are usually proposed to be products of rapid
melting.
Hi Darren -
Thanks - much has been lost in the stroke. I also seem
to remember a long slow cooling involved in
chondrule formation -
I am thinking that effervescence following a sudden
release of pressure might be a better process
description -
good hunting,
Ed
--- Darren Garrison [EMAIL
On Sat, 21 Oct 2006 14:58:23 -0700 (PDT), you wrote:
Hi Darren -
Thanks - much has been lost in the stroke. I also seem
to remember a long slow cooling involved in
chondrule formation -
Googling chondrule formation comes up with lots of stuff, much of it pretty
densly technical. Here's
Thanks Darren -
now this is more like it - h
--- Darren Garrison [EMAIL PROTECTED] wrote:
http://www.aspbooks.org/custom/publications/paper/index.phtml?paper_id=2447
Chondrule textures depend on the extent of melting
of the chondrule precursor- material when cooling
starts.
Kind of
On Sat, 21 Oct 2006 16:41:48 -0700 (PDT), you wrote:
Chondrule textures depend on the extent of melting
of the chondrule precursor- material when cooling
starts.
Kind of begs the question - chodrules formed by
collision, which causes melt - consider if one started
from a steady molten state
Hi list
What I have ben able to find personally on chondrule
formation is rather sketchy.
Even the otherwise comprehensive Encyclopedia of
Meteorites by O. Richard Norton seems to skim over the
mechanism in a paragraph. It's almost as if there is
something which defies explanation and
jeez Bob,
and all I was trying to do was to come up with a good
excuse to personally examine that Krasnojarsk RSPOD
Oct 15.
You're just about ready to handle some of my asteroid
and comet impact correspondence.
Ed
--- Rob McCafferty [EMAIL PROTECTED] wrote:
Hi list
What I have ben able
D]
To: New List Member
Sent: Friday, September 08, 2006 8:08 PM
Subject: Re: [meteorite-list] Chondrule NOT wasAD - New Rare
EL3Paleo-Meteorite - NWA 2828
Dear New List Member
A few years ago I would be more "touchy feely" in
addressing newbie
ead1
96632/pg1+sdunklee72520hl=enct=clnkcd=6
Those are my comments worth one cents. Sorry, Doug
- Original Message -
From: "Mr EMan" [EMAIL PROTECTED]
To: New List Member
Sent: Friday, September 08, 2006 8:08 PM
Subject: Re: [meteorite-list] Chondrule NOT wasAD - New Rare
EL3P
PROTECTED]
To: New List Member
Sent: Friday, September 08, 2006 8:08 PM
Subject: Re: [meteorite-list] Chondrule NOT wasAD - New Rare
EL3Paleo-Meteorite - NWA 2828
Dear New List Member
A few years ago I would be more touchy feely in
addressing newbie questions but tonight I am out of
any supportive way
Dear Steve Dunklee
A few years ago I would be more touchy feely in
addressing newbie questions but tonight I am out of
any supportive way to tell you that you may have the
lexicon right but, I can see you haven't taken the
Level 1 Sky Cadet Meteoritical Exam Module that
we all must pass to learn
Hello everyone,
I recently cut a little NWA and am interested in any opinions on some things
I found in it. This is my first attempt at taking pictures through my
rather inexpensive microscope but hopefully you'll get the idea.
Does this look like one of those bleached chondrules that Jeff
Tom K wrote:
I have seen pics of other meteorites with one large
chondrule, but never heard an explanation of why.
Hola Tom, I read your question before going to dinner. It was supposed to
be a celebration of the first day I have permission to go out since a little
surgery I had last week.
On Tue, 24 May 2005 03:30:27 EDT, [EMAIL PROTECTED] wrote:
of my ears like hot plasma. Le grit al mesero, MESERO! Hay un
grandsimo
grano de sal en este salero tan chiquillo. Y como pensaba que l era
experto en esos asuntos, y yo, andaba tan mortificado, le suplicaba que me
diera
Darren commented:
of my ears like hot plasma. Le grité al mesero, MESERO! Hay un
grandísimo
grano de sal en este salero tan chiquillo. Y como pensaba que él era
experto en esos asuntos, y yo, andaba tan mortificado, le suplicaba que
me diera
respuesta a qué se debía ese enorme
Tom wrote:
This meteorite was packed with chondrules but one chondrule stood out,
nothing special as far as chondrules go, but it is huge, not huge for
a chondrule, but huge for this meteorite! I am wondering how one big
chondrule could end up in a meteorite. I have seen pics of other meteo-
Hello List, I have a meteorite you probably seen before that is in getting
classified. It was 205 grams and I have sliced 3/4's of it up. This
meteorite was packed with chondrules but one chondrule stood out, nothing
special as far as chondrules go, but it is huge, not huge for a chondrule,
but
Howdy
My impression upon seeing this meteorite isn't that it necessarily
accreted quickly, but that it accreted in an environment that lacked
smaller particles. With no small bits scattered about, there was no
material to make up the typical matrix. Alternatively, even if it
accreted quickly
G'day List,
I was just reading through a section of 'Planetary Materials - Reviews in
Mineralogy, Volume 36' regarding Chondrules when one particular sentence
stuck out. It says:
A transient heating event melted the dustballs, and they were subsequently
cooled, initially at rates around hundreds
Well it came today.NWA 2892/CHONDRULE CONGLOMERATE.What a piece!Also my
new loupe came as well.And I have already started to get lost in the
chondrule sea.WOW!Thanks so much stefan.Also I got a post yesterday from
someone on this list who said,how come I am not more DIGNIFIED like
everyone else on
Hi Maria, Hello Mark and List,
Maria wrote:
I am wondering why this particular chondrule
weathered to a pinkish color.
Mark responded:
Just the right weathering conditions for the rusting
iron to permeate the chondrule and discolor it.
Maybe it is a porphyritic pyroxene chondrule where
On Friday, January 21, 2005 2:25 PM, Maria Haas [EMAIL PROTECTED]
wrote:
I have a lot of OC's with varying degrees of
weathering and chondrules poking through the desert varnish that are
not weathered like this one. I am wondering why this particular
chondrule weathered to a pinkish color.
Hello List,
The following pictures are of an unclassified NWA with what I am assuming is
a weathered armored chondrule. I have a lot of OC's with varying degrees of
weathering and chondrules poking through the desert varnish that are not
weathered like this one. I am wondering why this
Hi Steven and list,
if you are interested in chondrules - who is not;-)! - please have a
look at my
new PMMC page called: Chondrule Festival:
http://www.marmet-meteorites.com/id12.html
Comments and corrections welcome!
Thanks!
Peter Marmet
Steven Drummond wrote:
...I tried to continue
To: list
Subject: [meteorite-list] Chondrule Festival
Hi Steven and list,
if you are interested in chondrules - who is not;-)! - please have a
look at my
new PMMC page called: Chondrule Festival:
http://www.marmet-meteorites.com/id12.html
Comments and corrections welcome!
Thanks!
Peter Marmet
HUTCHISON R. (2004) Meteorites: A Petrologic, Chemical, and
Isotopic Synthesis (Cambridge Planetary Science Series, pp. 506).
p. 56: Chondrules are objects that were wholly or partly molten before
or during the accretion period(s) that led to the formation of chondrites.
NORTON O.Richard. (2002)
Bernd and List,
Hi John and List,
Aside from the origin of ureilites, it appears that traces of chondrules
are found in polymict ureilites and are probably from impactors - like
the chondrules sometimes found in howardites. See Mr. Weir's page
on DaG 319.
I might be lucky enough to have
Hi All
I came across this website.
http://www.ciw.edu/desch/SLIDES/gordon/index.html
I find it very informative, and
interesting.
Have a look, and think some big thoughts
:-)
Best
Lars
Hello Everyone,
Nice collection of papers dealing with the
formation of
chondrules in meteorites:
http://ads.harvard.edu/books/chto/
BTW, I am now selling smaller slices of NWA
482
(lunar meteorite) for half their usual asking
price.
http://branchmeteorites.com/sale/salenwa482.html
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