[meteorite-list] CAI and chondrules

From: Sterling K. Webb <sterling_k_webb_at_meteoritecentral.com>
Date: Thu, 1 Oct 2009 14:21:46 -0500
Message-ID: <7C58080F131B494096605F878862B991_at_ATARIENGINE2>

All I mean bu "we don't know, er, stuff..."
was that there is no definitive answer to
the puzzle. Proof of double supernovae,
T Tauri firestorms, system-wide lightning
bolts, or demons that like torment human
geophysicists is still unavailable.

Sterling K. Webb
-----------------------------------------------------
----- Original Message -----
From: "Jeff Grossman" <jgrossman at usgs.gov>
To: <meteorite-list at meteoritecentral.com>
Sent: Thursday, October 01, 2009 1:52 PM
Subject: Re: [meteorite-list] CAI and chondrules


I didn't say "we don't know cr*p"... I said there
was not a definitive answer. We know a lot about
the timing, materials, and physical conditions
needed to make chondrules and CAIs, and people
have used these to make models for their
formation. But many of these constraints are
under scrutiny right now, and some pretty basic
things are still controversial. What this means
is... ok, we don't know cr*p. But progress is being made.

Jeff


At 02:39 PM 10/1/2009, Sterling K. Webb wrote:
>Hi, Carl, Francesco, Jeff, List,
>
>Wrong, Carl. A good solid "We don't know
>crap about this yet; it's all up in the air"
>is the best kind of definitive answer.
>
>There are probably a half-dozen scenarios
>for how this data came about and there's few
>reasons to choose any one over the others.
>
>I was glad to hear Jeff confirm it.
>
>
>Sterling K. Webb
>-----------------------------------------------------------
>----- Original Message ----- From: "Carl 's"
><carloselguapo1 at hotmail.com>
>To: <meteorite-list at meteoritecentral.com>
>Sent: Wednesday, September 30, 2009 5:49 PM
>Subject: Re: [meteorite-list] CAI and chondrules
>
>
>
>Ahhh! Good questions, Francesco. I had been wondering about CAIs and
>chondrules myself. None of the books I've read explains,how?
>
>Thanks also for your answer, Jeff. While not definitive, it seems to be
>the only answer at this time. Thank you.
>
>Carl
>
>
>Jeff Grossman wrote:
>>...
>
>Definitive answers to what caused the formation of CAIs and chondrules
>are not known.
>
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Dr. Jeffrey N. Grossman phone: (703) 648-6184
US Geological Survey fax: (703) 648-6383
954 National Center
Reston, VA 20192, USA


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Received on Thu 01 Oct 2009 03:21:46 PM PDT