[meteorite-list] Largest 'Fall' Meteorite

[Jason Utas]

Right - the report I cited noted a mass about half that weight (1-1.5
tons) and vertical walls; I could be wrong, but I thought that the
determinant had to do with upended strata.  If anyone here has the
criteria for what determines a crater versus an impact pit, I'd be
much obliged - if there is indeed a clear-cut definition.
Regards,
Jason

On Mon, Oct 26, 2009 at 3:25 PM, Matt Morgan <mail at mhmeteorites.com> wrote:

> 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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>>

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