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need help IDing this?


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Hi guys, newbie here, found this in a swamp with a pitch fork, non-magnetic I believe but it is iron as it's starting to oxidize, weighs 80+ pds, about 15"x14", anyone got any Ideas, some expert looked at somes pics that weren't the sharpest but said it's probably silicified limestone, I don't believe it's limestone, thanks for any help, 2wheeljunkie

post-26869-0-47513200-1376931517_thumb.j

post-26869-0-87536100-1376931705_thumb.j

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Pour a little Muriatic acid on it. Limestone will foam like a shook up coke. We have acres and acres of eroded limestone here. Much of it looks just like that.

Edited by DeeDubya
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Use a file or a grinder in a spot that will be on the "bottom" so it won't be seen if this is to be possibly kept as a specimen if it turns out to be something unusual, thus exposing a "window" into the interior, try to get a good smooth window, take a good focused picture of the window and post it here for further discussion on this specimen.

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My next guess would be volcanic rock or slag. Either could contain just enough iron to rust but not enough to feel with a magnet. How does your metal detector react? I might send your pics to my sis (geologist). She's a petroleum geologist but knows her minerals well.

Edited by DeeDubya
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The second picture looks like the object already has ground off spots on it, on the left side in a few small places and at the top part,

they're not shiny, but look like it was previously ground, possibly to make it sit solidly, without wobbling(?). :idunno:

Greg

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