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 <parkforest...@hotmail.com> wrote: > > http://cgi.ebay.com/FOSSIL-MATRIX-TEKTITE-ANCIENT-MO-METEORITE-CRATER-/140449841609? > ______________________________________________ > Visit the Archives at > http://www.meteoritecentral.com/mailing-list-archives.html > Meteorite-list mailing list > Meteorite-list@meteoritecentral.com > http://six.pairlist.net/mailman/listinfo/meteorite-list ______________________________________________ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
