[meteorite-list] World's Smallest Witnessed Fall? - Revelstoke

From: MexicoDoug <mexicodoug_at_meteoritecentral.com>
Date: Thu, 2 Feb 2012 22:00:51 -0500 (EST)
Message-ID: <8CEB0372C48530D-1264-15F2A_at_webmail-m150.sysops.aol.com>

"That does seem very inconsistent. How is there several craters and no
rocks?"

Not inconsistent in the slightest - exactly what is expected for type
one carbonaceous chondrites as observed in other C1 accounts. Au
contraire, exactly what would be expected for such an aqueously altered
carbonaceous chondrite (C1).

When we are told chondrites are aqueously altered, it is aqeously
because water has permeated the entire structure of the meteoroid. As
long as there is no liquid water around and you are around the freezing
temperature in space (or below) of the water including the freezing
point depression caused by the mix, on the exterior of the meteoroid,
there is no problem being a solid structure. However, heat this up and
you get a Comet which leaves principally microparticles in space on the
order of the size that was found "disaggregated" - that's why we have
meteor showers as the leading theory goes.

Furthermore, just let this material come into contact with liquid water
and it will melt into dust as quickly as it is contacted, just like
cotton candy on your tongue. The classification of carbonaceous type 1
includes the idea that the entire thing has been cemented together with
water. Plus there are other solvents in there that are even more
volatile. Think also Tagish Lake also, besides Chris' example.

Even though craters could form from the still frozen watery particulate
suspension, there is no mention of craters vs. the impact hole
clarification in this account. Have you ever dropped a tiny pebble on
ice or snow? It serves in the Sun as a radiative source and it can
theoretically nucleate the a chain melting of a huge hole if the system
is otherwise right at the freezing point of the water.

Kindest wishes
Doug


-----Original Message-----
From: Stuart McDaniel <actionshooting at carolina.rr.com>
To: Galactic Stone & Ironworks <meteoritemike at gmail.com>;
Meteorite-list <Meteorite-list at meteoritecentral.com>
Sent: Thu, Feb 2, 2012 8:16 pm
Subject: Re: [meteorite-list] World's Smallest Witnessed Fall? -
Revelstoke


That does seem very inconsistent. How is there several craters and no
rocks?



Stuart McDaniel
Lawndale, NC
Secr.,
Cleve. Co. Astronomical Society
IMCA #9052

http://spacerocks.weebly.com
-----Original Message-----
From: Galactic Stone & Ironworks
Sent: Thursday, February 02, 2012 5:49 PM
To: Meteorite-list at meteoritecentral.com
Subject: [meteorite-list] World's Smallest Witnessed Fall? - Revelstoke

Hi List,

While nosing through the Met Bulletin today, I noticed a witnessed
fall with a TKW of only one gram! Is this correct, or is it a
mistake? What are the chances of someone finding 4 small fragments
that add up to one gram?

What makes it more interesting is that the fall was a rare carboncaeous
type.

Does anyone have any more info on this meteorite?

Revelstoke - http://www.lpi.usra.edu/meteor/metbull.php?code=22592

Best regards,

MikeG

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Received on Thu 02 Feb 2012 10:00:51 PM PST