[meteorite-list] Largest 'Fall' Meteorite

From: Matt Morgan <mail_at_meteoritecentral.com>
Date: Mon, 26 Oct 2009 22:25:10 +0000
Message-ID: <2122443723-1256596003-cardhu_decombobulator_blackberry.rim.net-231275228-_at_bda677.bisx.prod.on.blackberry>

I did some research on Sterlitamak, Russia for a presentation I gave to the Colorado Scientific Society in late 2008 on Non-Terminal Meteorite Impacts: The Case for Studying Small Cratering Events. Here is a summary of what I dug up on Sterlitamak:
-Formed a crater 30 ft wide by 18 ft deep
-Rays of ejecta extended 100 ft from crater
-Blocks of soil and bedrock lined crater walls, 20 in dia. thrown 300 ft.
-Impact breccias at crater floor to depth of 26 ft.
-Impact velocity 2-3 km/sec
-Impactor approx .9 m in dia and weighed 2-3 tons
-Equiv to 1.5-2 tons TNT

Sounds like a crater to me. I do believe it had an overturned flap of debris at the rim as well.

Matt
----------------------
Matt Morgan
Mile High Meteorites
http://www.mhmeteorites.com
P.O. Box 151293
Lakewood, CO 80215 USA

-----Original Message-----
From: Jason Utas <meteoritekid at gmail.com>
Date: Mon, 26 Oct 2009 15:12:22
To: Ted Bunch<tbear1 at cableone.net>; Meteorite-list<meteorite-list at meteoritecentral.com>
Subject: Re: [meteorite-list] Largest 'Fall' Meteorite

Right, but I don't believe that Campo del Cielo is noted as a
witnessed fall. If we're going to start listing every crater
associated with meteorite fragments, we're going to get a much longer
list.
The only accepted witnessed falls that have led to the formation of
legitimate craters are Carancas and Sikhote Alin. Another list member
suggested Sterlitamak; I still believe that, according to the
description of the impact features found:

http://adsabs.harvard.edu/abs/1992Metic..27R.276P

- That this is an impact pit, not a crater. Note the description of
sheer walls, etc.
Regards,
Jason

On Mon, Oct 26, 2009 at 2:51 PM, Ted Bunch <tbear1 at cableone.net> wrote:
> ?Rubin de Celis crater of the Campo del Cielo strewn field is a real crater
> - 0.04 km dia with a raised rim. - see Passc Website.
>
> Ted Bunch
>
>
> On 10/26/09 1:48 PM, "Jason Utas" <meteoritekid at gmail.com> wrote:
>
>> Yo,
>> Sikhote-Alin, the largest crater at 26m in diameter.
>> Only two meteorites are ever known to have created real craters upon
>> falling; Carancas and Sikhote-Alin.
>> Carancas' crater measures in at 13m.
>> I suppose falls like Gao could have been larger in mass than Caracas,
>> but I don't know if we even have a good estimate of the mass of
>> Carancas, so perhaps someone more knowledgeable about the event could
>> comment; the reports I could find online conflicted drastically.
>> Regards,
>> Jason
>>
>> On Mon, Oct 26, 2009 at 1:32 PM, Greg Stanley <stanleygregr at hotmail.com>
>> wrote:
>>>
>>> All:
>>> What is the Largest "Fall" known, and what was the size of the crater made?
>>>
>>> Greg S.
>>>
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Received on Mon 26 Oct 2009 06:25:10 PM PDT