Anne, you a always a welcome wealth of info. Blessed we are!
-Richard M
-----Original Message-----
From: Anne Black via Meteorite-list
Sent: Wednesday, October 15, 2014 5:56 PM
To: meteoritem...@gmail.com
Cc: meteorite-list@meteoritecentral.com ; m...@meteoriteguy.com ;
mstrema...@yahoo.com
Subject: Re: [meteorite-list] Fw: [Geology2] Meteorite fragments discovered
20 years after bolide event in Czech Republic
Eucritic inclusions in Haxtun, an H/L4 ordinary chondrite?
First one that came to mind, but there could be others.
Anne M. Black
www.IMPACTIKA.com
impact...@aol.com
-----Original Message-----
From: Galactic Stone & Ironworks <meteoritem...@gmail.com>
To: Anne Black <impact...@aol.com>
Cc: mike <m...@meteoriteguy.com>; mstreman53 <mstrema...@yahoo.com>;
meteorite-list <meteorite-list@meteoritecentral.com>
Sent: Wed, Oct 15, 2014 6:49 pm
Subject: Re: [meteorite-list] Fw: [Geology2] Meteorite fragments
discovered 20 years after bolide event in Czech Republic
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 <impact...@aol.com> wrote:
Not necessarily.
For instance: All kinds of different lithologies in Almahata Sitta.
Anne M. Black
www.IMPACTIKA.com
impact...@aol.com
-----Original Message-----
From: Galactic Stone & Ironworks <meteoritem...@gmail.com>
To: Anne Black <impact...@aol.com>
Cc: mike <m...@meteoriteguy.com>; mstreman53 <mstrema...@yahoo.com>;
meteorite-list <meteorite-list@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@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
impact...@aol.com
-----Original Message-----
From: Michael Farmer via Meteorite-list
<meteorite-list@meteoritecentral.com>
To: MEM <mstrema...@yahoo.com>
Cc: Meteorite Mailing List <meteorite-list@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@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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