Limestone Posted May 15, 2017 Share Posted May 15, 2017 This one might be a little hard but I think I found a seed shrimp (Ostracoda) in Limestone formations from middle Tertiary - crustaceous in northen Puerto Rico (sorry I don't know specifics yet) Here are the pictures. I came along some images online that show the same shape as the piece in question. Size ~ 3mm - 3.5mm Thanks for any help! Link to comment Share on other sites More sharing options...
JohnBrewer Posted May 15, 2017 Share Posted May 15, 2017 With tiny items you can get much better images with a scanner set to a high resolution. Also an internationally recognised scale, in mm's for your example, is better than a (foreign to me) coin. And welcome to to the forum! John Map of UK fossil sites Link to comment Share on other sites More sharing options...
Limestone Posted May 15, 2017 Author Share Posted May 15, 2017 Thank you John, I have scanned the piece, I try to get the resolution as high as I could. Please let me know if these work. Miguel Link to comment Share on other sites More sharing options...
doushantuo Posted May 15, 2017 Share Posted May 15, 2017 It is very well possible. Link to comment Share on other sites More sharing options...
powelli1 Posted May 15, 2017 Share Posted May 15, 2017 If it is it a very large one, I think it is just a small stone. George 1 Link to comment Share on other sites More sharing options...
fifbrindacier Posted May 15, 2017 Share Posted May 15, 2017 It could as well be a small stone than an ostracode. Only a specialist with a microscope could tell for sure what it is. Maybe should you show it to a local museum. 1 "On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry) "We only well see with the heart, the essential is invisible for the eyes." In memory of Doren Link to comment Share on other sites More sharing options...
Limestone Posted May 16, 2017 Author Share Posted May 16, 2017 Thank you for your replies, I will keep it and If I get a chance to take it to a specialist someday I will try post the results!! 1 Link to comment Share on other sites More sharing options...
Micah Posted May 16, 2017 Share Posted May 16, 2017 It looks like quartzite to me. Link to comment Share on other sites More sharing options...
Rockwood Posted May 16, 2017 Share Posted May 16, 2017 The shape is right, but the texture is off. It could be weathered or poorly preserved, but I'm afraid it may lack diagnostic features to say for sure. Link to comment Share on other sites More sharing options...
FossilDAWG Posted May 16, 2017 Share Posted May 16, 2017 It's very difficult to be sure from the photos, but I'm not seeing anything that has an ostracod gestalt to me. Rather, it resembles either a foraminiferan or (more likely) a calcitic echinoderm ossicle, either way with lots of matrix fused to it. This is typical of many limestones that are largely made of materials such as highly fragmented bryozoans and other organic materials, where partial dissolution and reprecipitation of calcite tends to make everything merge together. Don 2 Link to comment Share on other sites More sharing options...
doushantuo Posted May 16, 2017 Share Posted May 16, 2017 Dunno about you guys,but I think the outline is reminiscent of a myodocope Pore canals,etc can be obliterated by diagenesis 1 Link to comment Share on other sites More sharing options...
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