[meteorite-list] Rolling Rock, (not the beer)

From: MeteorHntr_at_aol.com <MeteorHntr_at_meteoritecentral.com>
Date: Thu Apr 22 10:25:36 2004
Message-ID: <1d8.919b654.2be93568_at_aol.com>

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Hello List,

I was looking at these two pictures of the Barnes' Park Forest meteorite in
the crater:

 <A HREF="http://members.aol.com/meteorhntr/pfbvent.jpg">http://members.aol.com/meteorhntr/pfbvent.jpg</A>

 <A HREF="http://members.aol.com/meteorhntr/pfbmount.jpg">http://members.aol.com/meteorhntr/pfbmount.jpg</A>

 
The first thing that I noticed was that the embedded sheetrock (on the
specimen) from the ceiling, is located in the top portion of the rock.
Therefore the rock had to have rotated at least 1/2 turn, possibly 1 and 1/2
turns or more between going through the ceiling and then hitting the vent at
floor level 8 feet later.

Then looking at the photos, it first appears that the rock came in from the
right at possibly around a 60 degree angle.

However, since the hole in the roof is directly above the impact pit, and
there is a glass sliding door a couple inches to the right of where the vent
was located, indicates that the rock may have been tumbling quite fast,
digging itself in towards the left, clockwise, as it hit the vent cover.

I know during the free fall, the rocks come pretty much strait down, but
since this was coming from the Southeast (or from the right of where the vent
is located) and if it was rotaing clockwise, that would mean it was doing,
what we used to call in my old swimmming pool days a "gainer."

Not that all this really matters much. I just thought it was interesting.

On a side note, since the Barnes' rock is the only one recovered from
Matteson, IL, can it be called the "Matteson Main Mass?" ;-)

Steve Arnold
Arkansas

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<HTML><FONT FACE=3Darial,helvetica><FONT SIZE=3D2 FAMILY=3D"SANSSERIF" FACE=
=3D"Arial" LANG=3D"0">Hello List,<BR>
<BR>
I was looking at these two pictures of the Barnes' Park Forest meteorite in=20=
the crater:<BR>
<BR>
 <A HREF=3D"http://members.aol.com/meteorhntr/pfbvent.jpg">http://members.ao=
l.com/meteorhntr/pfbvent.jpg</A> <BR>
<BR>
 <A HREF=3D"http://members.aol.com/meteorhntr/pfbmount.jpg">http://members.a=
ol.com/meteorhntr/pfbmount.jpg</A><BR>
<BR>
 <BR>
The first thing that I noticed was that the embedded sheetrock (on the speci=
men) from the ceiling, is located in the top portion of the rock.&nbsp; Ther=
efore the rock had to have rotated at least 1/2 turn, possibly 1 and 1/2 tur=
ns or more between going through the ceiling and then hitting the vent at fl=
oor level 8 feet later.&nbsp; <BR>
<BR>
Then looking at the photos, it first appears that the rock came in from the=20=
right at possibly around a 60 degree angle. <BR>
<BR>
However, since the hole in the roof is directly above the impact pit, and th=
ere is a glass sliding door a couple inches to the right of where the vent w=
as located, indicates that the rock may have been tumbling quite fast, diggi=
ng itself in towards the left, clockwise, as it hit the vent cover.<BR>
<BR>
I know during the free fall, the rocks come pretty much strait down, but sin=
ce this was coming from the Southeast (or from the right of where the vent i=
s located) and if it was rotaing clockwise, that would mean it was doing, wh=
at we used to call in my old swimmming pool days a "gainer."<BR>
<BR>
Not that all this really matters much.&nbsp;&nbsp; I just thought it was int=
eresting.<BR>
<BR>
On a side note, since the Barnes' rock is the only one recovered from Mattes=
on, IL, can it be called the "Matteson Main Mass?"&nbsp; ;-)<BR>
<BR>
Steve Arnold<BR>
Arkansas<BR>
</FONT></HTML>
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Received on Tue 06 May 2003 11:57:28 AM PDT


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