MarXthespot Posted March 7, 2018 Share Posted March 7, 2018 I just came across this very recent academic paper that goes into many different forms of replacement mineralization of petrified wood, beyond the more recognized polymorphs of silica: opal-A, opal-C, chalcedony, and quartz. http://www.mdpi.com/2076-3263/8/3/85/htm Even if the article is too technical and nerdy for most to read, it is cool to look at some pics of alternative finds you might come across in your prospecting. I'd love to come across one of those petrified pine cones! Are those in Fig. 12 (Iron carbonate) similar to the ones mentioned from Alaska? 2 Link to comment Share on other sites More sharing options...
Bob(AK) Posted May 1, 2018 Share Posted May 1, 2018 WOW, just got back to look at this article, will have to spend some hours with it, thanks Marx Link to comment Share on other sites More sharing options...
Sasquatch Posted August 15, 2018 Share Posted August 15, 2018 Very late to the conversation, just joined the forums. That looks almost identical to the petrified wood on the Kenai, AK. Pretty common but younger and less mineralized than that of AZ. While you might not be known for petrified wood in Ohio, Ohio and Pennsylvania have a lot of coal, this type of petrified wood seems to be found near coal seams, often times we find pieces that look half coal/half petrified, rarer to find mineralized stuff up here. Link to comment Share on other sites More sharing options...
SJ Brock Posted October 4, 2019 Share Posted October 4, 2019 These two pieces were found in Eastern Nebraska. I believe this to be petrified wood. Any feedback would be appreciated. Thank you! Link to comment Share on other sites More sharing options...
DDancer Posted October 4, 2019 Share Posted October 4, 2019 Couple of things you can try: Hand polish the flat end with emery paper then soak as Bob pointed out to see if you can find banding. Usually just a hand polish and wetting will work but soaking might work better because its so dark. Second is find a friend with a mason saw and have a slab cut for a fresh look inside, if the cuts to rough a hand polish and wetting should reveal any banding. Link to comment Share on other sites More sharing options...
SJ Brock Posted October 4, 2019 Share Posted October 4, 2019 Thank you, great recommendation - I'm on it! Link to comment Share on other sites More sharing options...
SJ Brock Posted October 4, 2019 Share Posted October 4, 2019 Here is different pic. of larger piece after simply washing. Finger shown for scale. Very fragile, as you can see pieces in lower part of picture are fragments of where i am pointing (fragments approx. 6-8 in in length). Soaking in bleach, will also get a mason blade. Thanks again! 1 Link to comment Share on other sites More sharing options...
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