jameswhitt Posted September 27, 2021 Share Posted September 27, 2021 I found this while backpacking in Arkansas. I thought it may be a tortoise shell? Link to comment Share on other sites More sharing options...
Rockwood Posted September 27, 2021 Share Posted September 27, 2021 Sorry. No tort. Septarian concretion. 3 Link to comment Share on other sites More sharing options...
Coco Posted September 27, 2021 Share Posted September 27, 2021 Agree with what was just said, but keep looking. For your future photos, do not take your samples in your hands because they are not a good indication of measurements (there are all sizes!) and it promotes blur. On the other hand, read my last link in my signature. If you don’t have a ruler, print out my handout and put your fossils on it before taking your photo, making sure to leave one of the size boxes visible Coco 1 ---------------------- OUTIL POUR MESURER VOS FOSSILES : ici Ma bibliothèque PDF 1 (Poissons et sélaciens récents & fossiles) : ici Ma bibliothèque PDF 2 (Animaux vivants - sans poissons ni sélaciens) : ici Mâchoires sélaciennes récentes : ici Hétérodontiques et sélaciens : ici Oeufs sélaciens récents : ici Otolithes de poissons récents ! ici Un Greg... Link to comment Share on other sites More sharing options...
ClearLake Posted October 9, 2021 Share Posted October 9, 2021 Looks flatish to me and maybe on a bedding plane. Could be preserved mud cracks. Any idea on age or formation? 1 Link to comment Share on other sites More sharing options...
Rockwood Posted October 9, 2021 Share Posted October 9, 2021 3 hours ago, ClearLake said: Looks flatish to me and maybe on a bedding plane. Could be preserved mud cracks. Any idea on age or formation? I see. What the firs photo giveth the second taketh away. 1 Link to comment Share on other sites More sharing options...
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