DPS Ammonite Posted January 1, 2018 Share Posted January 1, 2018 What is the net like pattern that sticks-out on the inside and outside of a silicified Pennsylvanian horn coral from NW of Payson, Arizona? Could it be an epibont-sponge? Could it be silica that filled cracks in part of the coral that was not silicified and eroded away? The coral opening is about 2.5 inches across. My goal is to leave no stone or fossil unturned. See my Arizona Paleontology Guide link The best single resource for Arizona paleontology anywhere. Link to comment Share on other sites More sharing options...
ynot Posted January 1, 2018 Share Posted January 1, 2018 Mineralized cracks. Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
Miocene_Mason Posted January 1, 2018 Share Posted January 1, 2018 Did somebody say Boxwork! no? How about now? Edit: which is basically the same thing Tony said I believe. “...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin Happy hunting, Mason Link to comment Share on other sites More sharing options...
doushantuo Posted January 1, 2018 Share Posted January 1, 2018 It's a phreatic calcite mosaic that extended into void-filling cement. A not unusual diagenetic product ,particularly in Pleistocene corals from the tropics Vide supra Link to comment Share on other sites More sharing options...
Arizona Chris Posted January 1, 2018 Share Posted January 1, 2018 Looks like a calcedony extrusion from the surface of a naco rugose. ---------------------------------------------------------------------------------------------------------------------------- Arizona Chris Paleo Web Site: http://schursastrophotography.com/fossiladventures.html Link to comment Share on other sites More sharing options...
DPS Ammonite Posted January 3, 2018 Author Share Posted January 3, 2018 Thank you everyone and Occam. The simplest answer is the best one. My goal is to leave no stone or fossil unturned. See my Arizona Paleontology Guide link The best single resource for Arizona paleontology anywhere. Link to comment Share on other sites More sharing options...
ynot Posted January 3, 2018 Share Posted January 3, 2018 On 12/31/2017 at 7:22 PM, WhodamanHD said: Did somebody say Boxwork! no? How about now? Edit: which is basically the same thing Tony said I believe. "boxwork" is more of a descriptive term and does apply in this case, but does not necessarily need be made of mineralized cracks. Often boxwork is created by intergrown tabular crystals. Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
bone2stone Posted January 3, 2018 Share Posted January 3, 2018 Now ain't dat cool. No input but I admire the specimen anyway. Jess B. Link to comment Share on other sites More sharing options...
Ludwigia Posted January 3, 2018 Share Posted January 3, 2018 So is it calcite or is it chalcedony? A little vinegar would bring certainty. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
DPS Ammonite Posted January 3, 2018 Author Share Posted January 3, 2018 Silica. I etched the whole thing out of limestone with HCl. My goal is to leave no stone or fossil unturned. See my Arizona Paleontology Guide link The best single resource for Arizona paleontology anywhere. Link to comment Share on other sites More sharing options...
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