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704 Views 1 Reply Last post: Apr 19, 2013 9:17 PM by MikeHardman RSS
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Apr 19, 2013 7:48 PM

Perfectly spherical rock

Hello!

Found an unusual stone nr Little Hereford far away from a river or stream which is perfectly spherical and smooth. Also has a strange question marked mark on it. Probably nothing, however was just wondering if anyone knows anything about the stone as it is rather odd and mysterious.

Thanks for any help, Richard.

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    Apr 19, 2013 9:17 PM (in response to hrhaynes)
    Re: Perfectly spherical rock

    Hello Richard,

     

    I see why you find it intruguing, and that question mark just begs for an answer!

     

    As always with these things, there are three basic possibilities:

    - extra-terrestrial (meteorite)

    - terrestrial and natural (probably rock)

    - terrestrial and man-made (canon ball, industrial slag, industrial product, etc.)

     

    The structures and compositions of each of those overlap, so even deciding that first basic category can be tricky. We need to look at lots of characters and build up a body of evidence, hoping that it points clearly to one of those categories, and preferably something more specific.

     

    The things to consider are covered in various web sites, but the ones dealing with potential meteorites cover a lot of useful bases. Have a look at these and work your way through them:

    - http://epswww.unm.edu/iom/ident/index.html (also a useful table of densities)

    - http://www.meteorites.com.au/found.html

    - http://www.nhm.ac.uk/natureplus/community/identification/blog/2012/08/15/rocks-from-space--have-you-found-a-meteorite

     

    If you emerge from that research thinking your specimen may be something old and man-made, consider showing it to a local history museum. They would be the ones to be aware of old industries in the area, and associated artefacts. Even if they don't recognize it, they might be interested in keeping it (assuming you are willing to part with it.)

     

    Oh, that question mark...

    I can't help wondering if it is a remnant of where an iron chain was anchored to the ball...

    But let's see where the actual evidence leads us.

     

    Mike

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