[meteorite-list] Czech meteorite fragments 20 years

From: Michael Farmer <mike_at_meteoritecentral.com>
Date: Wed, 15 Oct 2014 17:13:38 -0700
Message-ID: <C455D53D-53B8-42AA-9214-7EF79804B1E9_at_meteoriteguy.com>

Not to mention they are highly desert varnished, something never seen in a wet place, and different types.
Whoever pulled this scam is pretty foolish.
Michael Farmer

Michael Farmer

> On Oct 15, 2014, at 5:02 PM, Paul Gessler via Meteorite-list <meteorite-list at meteoritecentral.com> wrote:
>
> Looks like something that was found sitting in a Moroccan sale bin for the last 20 years.
> They look a lot older than 20 years to me.
>
> Paul G
>
>
> -----Original Message----- From: MEM via Meteorite-list
> Sent: Wednesday, October 15, 2014 4:53 PM
> To: Meteorite Mailing List
> Subject: [meteorite-list] Fw: [Geology2] Meteorite fragments discovered 20years after bolide event in Czech Republic
>
>
> <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 Bene?ov 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 Bene?ov 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. Spurn? 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 Bene?ov 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 Bene?ov 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 Spurn?, Jakub Haloda, Ji?? Borovi?ka, Luk?? Shrben?, Patricie Halodov?. Reanalysis of the Bene?ov 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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Received on Wed 15 Oct 2014 08:13:38 PM PDT