2wheeljunkie Posted August 19, 2013 Share Posted August 19, 2013 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 Quote Link to comment Share on other sites More sharing options...
DeeDubya Posted August 19, 2013 Share Posted August 19, 2013 (edited) 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 August 19, 2013 by DeeDubya Quote Link to comment Share on other sites More sharing options...
The Found Dutchman Posted August 19, 2013 Share Posted August 19, 2013 If it's non magnetic, it's surely not iron. Quote Link to comment Share on other sites More sharing options...
2wheeljunkie Posted August 19, 2013 Author Share Posted August 19, 2013 Happy to report the acid test was negative, I put enough on for it to sit and run off, absolutely no visible sign of a reaction, thanks for tip! 2wheeljunkie Quote Link to comment Share on other sites More sharing options...
2wheeljunkie Posted August 19, 2013 Author Share Posted August 19, 2013 in regards to The Found Dutchman's reply, it may not be magnetic but it is some kind of dense metal, whatever it is, it is NOT a rock or a stone. thanks, 2wheeljunkie Quote Link to comment Share on other sites More sharing options...
Au Seeker Posted August 19, 2013 Share Posted August 19, 2013 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. Quote Link to comment Share on other sites More sharing options...
DeeDubya Posted August 20, 2013 Share Posted August 20, 2013 (edited) 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 August 20, 2013 by DeeDubya Quote Link to comment Share on other sites More sharing options...
Mikestang Posted August 21, 2013 Share Posted August 21, 2013 Looks like a lava rock (basalt), not a meteorite. Quote Link to comment Share on other sites More sharing options...
AuTSaurus Posted August 21, 2013 Share Posted August 21, 2013 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(?). Greg Quote Link to comment Share on other sites More sharing options...
adam Posted August 22, 2013 Share Posted August 22, 2013 (edited) Looks a lot like Picrite Basalt, and its origin was most likely Kumabongwana, South Africa near the town of Sigidini.You are in South Africa aren't you ? Edited August 22, 2013 by adam Quote Link to comment Share on other sites More sharing options...
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