nicholasakl Posted May 19, 2023 Share Posted May 19, 2023 Hello, I have this piece of rock found in the Motagua Valley of Guatemala. I was wondering if it might be some type of fossilized wood. Thanks, Nicholas VID-20230515-WA0014.mp4 Link to comment Share on other sites More sharing options...
FranzBernhard Posted May 20, 2023 Share Posted May 20, 2023 Welcome to TFF from Austria! I don´t think that this is fossil wood. From the outside, I thought some sort of gneiss, but from the polished surface, it looks more like travertine, sinter or even some kind of stromatolite or "layered sponge". What is it composed of? Quartz-based, Calcium-carbonate based or even a mixture of both? Would you like to provide some detailed still pics of the polished surface? Thank you! Franz Bernhard Link to comment Share on other sites More sharing options...
Rockwood Posted May 20, 2023 Share Posted May 20, 2023 A few still photos of the dry specimen are much easier for me to identify, but I agree that it does not look like wood. Link to comment Share on other sites More sharing options...
nicholasakl Posted May 20, 2023 Author Share Posted May 20, 2023 I believe it is quartz what we see in the outside picture. I don't know rocks that mucho so that is about as much as I can tell. 1 Link to comment Share on other sites More sharing options...
Rockwood Posted May 20, 2023 Share Posted May 20, 2023 I can see a suggestion of wood grain, but I think this is highly metamorphosed rock. 2 Link to comment Share on other sites More sharing options...
FranzBernhard Posted May 20, 2023 Share Posted May 20, 2023 Thank you very much for the additional pics! Last pic makes it clear for me: Gneiss! Fits with the general occurrence of metamorphic rocks there. Btw, did you find any jade in that area? Motagua Valley, Guatemala (mindat.org) Franz Bernhard Link to comment Share on other sites More sharing options...
nicholasakl Posted May 20, 2023 Author Share Posted May 20, 2023 Than you for your input. I did find some nephrite-like rocks and other interesting stuff. WARNING. rock spam, no fossils here VID-20230516-WA0034.mp4 VID-20230510-WA0048.mp4 VID-20230509-WA0032.mp4 20230507_082400.mp4 2 Link to comment Share on other sites More sharing options...
nicholasakl Posted May 20, 2023 Author Share Posted May 20, 2023 From that same tripp I brought this piece which I tought kind-of looked like the pattern in ammonites. Interesting none the least. 20230520_113437.mp4 1 Link to comment Share on other sites More sharing options...
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