[meteorite-list] Missouri "Round Rocks" are tektites?

From: bill kies <parkforestmet_at_meteoritecentral.com>
Date: Wed, 8 Sep 2010 22:45:25 -0500
Message-ID: <SNT102-W64E7FFE92C5BAAB3D6FA91A2730_at_phx.gbl>

Jason,
 
Before I sent that link, I spent several hours using the amazing internet and found quite a bit of info. Enough to convince me this stuff is not what it's represented to be. Hard to believe isn't it? The only point of my post was to point out another ridiculous ebay sale that's been pretty successful selling concretions as tektites.
 
I was hoping the community might address the issue or at least alert those that might not be aware of the fact that these rocks are probably not tektites.
 
Best Wishes,
Bill
 


----------------------------------------
> Date: Wed, 8 Sep 2010 20:23:36 -0700
> Subject: Re: [meteorite-list] Missouri "Round Rocks" are tektites?
> From: meteoritekid at gmail.com
> To: parkforestmet at hotmail.com; meteorite-list at meteoritecentral.com
>
> Hello Bill, All,
> Google-ing "Osceola round rocks" turned up the following:
>
> http://en.wikipedia.org/wiki/Weaubleau-Osceola_structure
>
> Excerpt:
>
> Round rocks of Osceola
>
> Long thought to be a glacial remnant, these conglomerate rocks are
> found in the area of Osceola. They are nearly perfectly round, and are
> referred to locally simply as "round rocks" or "Missouri rock balls".
> Current theory suggests that these rocks are chert concretions,
> created when the impact threw pieces of shale away from the center of
> the crater, and later silica-rich materials formed around the shale
> seeds.
>
> The following reference mentioned the round rocks, but gave no
> explanation for their formation:
>
> http://courses.missouristate.edu/KevinEvans/RI-75(2003AMGguidebook).pdf
>
> The next reference noted 'angular' chert clasts with siltstone
> interiors, but made no mention of the rounded cobbles:
>
> http://www.lpi.usra.edu/meetings/largeimpacts2003/pdf/4111.pdf
>
> The amount of information you can find in only a few minutes with a
> simple search...that internet's an amazing thing.
> Best,
> Jason
>
> On Tue, Sep 7, 2010 at 4:10 PM, bill kies wrote:
> >
> > http://cgi.ebay.com/FOSSIL-MATRIX-TEKTITE-ANCIENT-MO-METEORITE-CRATER-/140449841609?
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Received on Wed 08 Sep 2010 11:45:25 PM PDT