JoeDINO Posted June 13, 2021 Share Posted June 13, 2021 (edited) Please find attached pictures of an oddly shaped and structured object. It was found while removing a deep rooted tree. This was in Royse City in Hunt County. After having no luck identifying it, somebody suggested this forum for guidance. Thank you for your review. Joe Edited June 13, 2021 by JoeDINO Typos Link to comment Share on other sites More sharing options...
Thomas.Dodson Posted June 13, 2021 Share Posted June 13, 2021 Welcome to the forum. This is a section of an ammonite; the pattern you see are known as suture patterns. 2 Link to comment Share on other sites More sharing options...
Fossildude19 Posted June 13, 2021 Share Posted June 13, 2021 Welcome to the forum. This is a piece of ammonite - the squiggly lines are the sutures. Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "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...
JoeDINO Posted June 13, 2021 Author Share Posted June 13, 2021 Thank you. Link to comment Share on other sites More sharing options...
JoeDINO Posted June 13, 2021 Author Share Posted June 13, 2021 Sutures as in two or more pieces being sewn together? The ammonites I just looked thru mostly appeared to have a shell and made a spiral pattern. I looked at one image with similar markings but the lines appeared mostly cosmetic and transcended acute shell size changes. These appear as individual pieces and some of the line cavitation is 1/8" deep. Does that still fit for "ammonite"? Link to comment Share on other sites More sharing options...
daves64 Posted June 13, 2021 Share Posted June 13, 2021 Yes, this is a section of an ammonite. The depth & width of the spaces would be from weathering. 1 Accomplishing the impossible means only that the boss will add it to your regular duties. Link to comment Share on other sites More sharing options...
Coco Posted June 13, 2021 Share Posted June 13, 2021 51 minutes ago, JoeDINO said: The ammonites I just looked thru mostly appeared to have a shell and made a spiral pattern. Yes. On yours, the shell has been dissolved and what you see is an internal mold. Coco 2 ---------------------- 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...
ChristineR Posted June 13, 2021 Share Posted June 13, 2021 51 minutes ago, JoeDINO said: Sutures as in two or more pieces being sewn together? The ammonites I just looked thru mostly appeared to have a shell and made a spiral pattern. I looked at one image with similar markings but the lines appeared mostly cosmetic and transcended acute shell size changes. These appear as individual pieces and some of the line cavitation is 1/8" deep. Does that still fit for "ammonite"? Here is an interesting article by Inoue and Kondo for Nature, explaining the formation of and variations in suture marks among ammonites. As the ammonite and it’s shell grew the suture patterns became more complex. This arrival does not show extensive examples of the variations, but the CT images illustrate the formation and growth of sutures. I hope you enjoy the article, I found it informative. https://www.nature.com/articles/srep33689#Fig3 1 Link to comment Share on other sites More sharing options...
JoeDINO Posted June 13, 2021 Author Share Posted June 13, 2021 Excellent feedback thank you very much. Link to comment Share on other sites More sharing options...
Ludwigia Posted June 13, 2021 Share Posted June 13, 2021 It is also noteworthy to know that the suture lines are the end extensions of the septal walls which make up the phragmocone, the buoyancy apparatus of ammonites at the center of the spiral. The creature housed itself in the living chamber at the outer end of the spiral where there are no sutures to be seen. This part of the shell is not as often preserved as is the case with the phragmocone, since it is more unstable and susceptible to being crushed. 3 Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
JoeDINO Posted June 13, 2021 Author Share Posted June 13, 2021 Very interesting indeed. There are several of similar look and design in the area which was recently churned for development. Some are dirt clauds when picked up and break easily and all have a similar orange coloring. Link to comment Share on other sites More sharing options...
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