[meteorite-list] Fw: [Geology2] Meteorite fragments discovered 20 years after bolide event in Czech Republic

Wed Oct 15 20:51:33 EDT 2014

Regardless, it would take far more evidence to suggest such a thing, not desert varnished ancient meteorites supposedly found only 20 years after a fall. No one in their right mind would think these are only 20 years old. 
Michael Farmer

Sent from my iPad

> On Oct 15, 2014, at 5:49 PM, Galactic Stone & Ironworks <meteoritemike at gmail.com> wrote:
> 
> True, but it is quite rare.  I cannot think of another example right
> off-hand.  Are there any others?
> 
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> 
>> On 10/15/14, Anne Black <impactika at aol.com> wrote:
>> Not necessarily.
>> For instance:  All kinds of different lithologies in Almahata Sitta.
>> 
>> 
>> Anne M. Black
>> www.IMPACTIKA.com
>> IMPACTIKA at aol.com
>> 
>> 
>> -----Original Message-----
>> From: Galactic Stone & Ironworks <meteoritemike at gmail.com>
>> To: Anne Black <impactika at aol.com>
>> Cc: mike <mike at meteoriteguy.com>; mstreman53 <mstreman53 at yahoo.com>;
>> meteorite-list <meteorite-list at meteoritecentral.com>
>> Sent: Wed, Oct 15, 2014 6:30 pm
>> Subject: Re: [meteorite-list] Fw: [Geology2] Meteorite fragments
>> discovered 20 years after bolide event in Czech Republic
>> 
>> 
>> Another red flag - two different types in the same fall.  An H5 and an
>> LL3.5 would suggest two different parent bodies.
>> 
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>> 
>> On 10/15/14, Anne Black via Meteorite-list
>> <meteorite-list at meteoritecentral.com> wrote:
>>> You could also compare them to Holbrooks, still found 100+ years after
>>> the fall.
>>> And No, they don't look right.
>>> Not buying either.
>>> 
>>> 
>>> Anne M. Black
>>> www.IMPACTIKA.com
>>> IMPACTIKA at aol.com
>>> 
>>> 
>>> -----Original Message-----
>>> From: Michael Farmer via Meteorite-list
>>> <meteorite-list at meteoritecentral.com>
>>> To: MEM <mstreman53 at yahoo.com>
>>> Cc: Meteorite Mailing List <meteorite-list at meteoritecentral.com>
>>> Sent: Wed, Oct 15, 2014 5:55 pm
>>> Subject: Re: [meteorite-list] Fw: [Geology2] Meteorite fragments
>>> discovered 20 years after bolide event in Czech Republic
>>> 
>>> 
>>> Sorry but fake as crap, clearly ancient NWA meteorite. Pultusk stones
>>> are still
>>> being 150 years after the fall and they don't even look hardly
>> weathers
>>> at all,
>>> same wet climate.
>>> Sorry but I call a scam,
>>> Michael Farmer
>>> 
>>> Sent from my iPad
>>> 
>>>> On Oct 15, 2014, at 4:53 PM, MEM via Meteorite-list
>>> <meteorite-list at meteoritecentral.com>
>>> wrote:
>>>> 
>>>> 
>>>> <www.sciencedaily.com/releases/2014/10/141014142736.htm>
>>>> 
>>>> Meteorite fragments discovered 20 years after bolide event in Czech
>>> Republic
>>>> Date: October 14, 2014
>>>> Source: Astronomy & Astrophysics
>>>> Summary: Scientists have discovered meteorite fragments 20 years
>>> after the
>>> corresponding bolide
>>>> was seen in the skies of the Czech Republic. This discovery was made
>>> possible
>>> by reanalyzing the trajectory, which moved the impact line by 330
>>> meters.
>>> Interestingly, the meteorites found on the ground are of
>>>> different types, pointing to a parent asteroid of heterogeneous
>>> composition.
>>>> 
>>>> 
>>>> 
>>>> ________________________________
>>>> 
>>>> 
>>>> First three Benešov meteorites found in April 2011, with metal
>>> detectors. From
>>> left to
>>>> right: H5 chondrite of 1.56 g, LL3.5 chondrite of 7.72 g with
>>> achondrite
>>> clast, and LL3.5 chondrite of 1.99 g [2].
>>>> Credit: Image courtesy of Astronomy & Astrophysics
>>>> 
>>>> 
>>>> Astronomy & Astrophysics is publishing the spectacular discovery of
>>> meteorite
>>> fragments 20 years after the corresponding bolide was seen in the
>> skies
>>> of the
>>> Czech
>>>> Republic. This discovery was made possible by reanalyzing the
>>>> trajectory, which moved the impact line by 330 meters. Interestingly,
>>>> the meteorites found on the ground are of different types, pointing
>>> to a
>>> parent asteroid of heterogeneous composition.
>>>> Collisions of meter-sized meteoroids with Earth's atmosphere are
>>>> relatively rare, occurring about 40 times a year. They cause very
>>>> spectacular events, known as superbolides. One of the best known such
>>>> events, the Benešov bolide, occurred on 7 May 1991 at 23h 03m 46s UT
>>>> over the Czech Republic. It was recorded during systematic
>>> photographic
>>>> observations by the European Fireball Network and certainly ended in
>>> a
>>>> multiple meteorite fall, but no meteorite was found in the weeks and
>>>> years after the fall, despite many attempts.
>>>> In February 2011, nearly 20 years after the event, P. Spurný and his
>>>> colleagues [1] measured the records again and analyzed the data with
>>>> improved methods. This led to a new picture of the whole event with a
>>>> revised atmospheric trajectory and a new impact location. This
>>> allowed
>>>> the team to recover the Benešov meteorites, 20 years after the fall,
>>>> exactly in the newly predicted area. It is the first time a meteorite
>>> is found
>>> so long after the bolide observation.
>>>> The team found four small, highly-weathered meteorites with a total
>>>> mass of 12 g. The probability that these four fragments come from
>>>> different meteoroids and were found by chance at the same place is
>>>> estimated to be 1 in 100,000 or less. Even more interestingly, these
>>>> four meteorites are of three different mineralogical types. This
>>> means
>>>> that the Benešov meteoroid was heterogeneous and contained at least
>>>> three different types of material. After the Almahata Sitta fall,
>>> this
>>>> is the second time that such a heterogeneous composition has been
>>> found. It
>>> raises the possibility that a significant fraction of all asteroids
>>>> are heterogeneous and that they were strongly reprocessed by
>>> collisions
>>>> with other asteroids in the main belt.
>>>> ________________________________
>>>> 
>>>> Story Source:
>>>> The above story is based on materials provided by Astronomy &
>>> Astrophysics.
>>> Note: Materials may be edited for content and length.
>>>> ________________________________
>>>> 
>>>> Journal Reference:
>>>>   1. Pavel Spurný, Jakub Haloda, Jiří Borovička, Lukáš Shrbený,
>>> Patricie
>>> Halodová. Reanalysis of the Benešov bolide and recovery of polymict
>>> breccia
>>> meteorites – old mystery solved after 20 years. Astronomy &
>>> Astrophysics, 2014;
>>> 570: A39 DOI: 10.1051/0004-6361/201424308
>>>> ________________________________
>>>> 
>>>> 
>>>> Astronomy & Astrophysics. "Meteorite fragments discovered 20 years
>>> after
>>>> bolide event in Czech Republic." ScienceDaily. ScienceDaily, 14
>>> October
>>>> 2014. <www.sciencedaily.com/releases/2014/10/141014142736.htm>.
>>>> 
>>>> 
>>>> 
>>>> .
>>>> 
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>> 
>> 
>> 