New Members JorDorf Posted Wednesday at 04:39 PM New Members Share Posted Wednesday at 04:39 PM Very hard and dense. Smaller one has black specks maybe parasites? Link to comment Share on other sites More sharing options...
Brandy Cole Posted Wednesday at 05:05 PM Share Posted Wednesday at 05:05 PM This appears to be a piece of chert to me. I don't see a shape consistent with coprolites, but others more familiar with them may weigh in. 1 Link to comment Share on other sites More sharing options...
Fossildude19 Posted Wednesday at 05:16 PM Share Posted Wednesday at 05:16 PM Is the area known for coprolite fossils? Do you see any inclusions under a microscope? To me, these look like water worn river cobbles. 1 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 IPFOTM -- MAY - 2024 _________________________________________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
DPS Ammonite Posted Wednesday at 05:52 PM Share Posted Wednesday at 05:52 PM All but maybe the upper left rocks are volcanic porphyries worn by a river. Note polygonal crystals of probably feldspar. https://en.m.wikipedia.org/wiki/Porphyry_(geology) 3 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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