jackdangers Posted December 22, 2014 Share Posted December 22, 2014 I found this in a septarian nodule in Texas. Link to comment Share on other sites More sharing options...
Doctor Mud Posted December 22, 2014 Share Posted December 22, 2014 Hi there, Welcome to the forum. This looks like a suggestively shaped concretion to me. I don't see any evidence for bone. Looks like it is coated with some sort of carbonate, probably calcite. Link to comment Share on other sites More sharing options...
jackdangers Posted December 22, 2014 Author Share Posted December 22, 2014 Can I post more pictures? It has a very distinct "spine". Link to comment Share on other sites More sharing options...
jackdangers Posted December 22, 2014 Author Share Posted December 22, 2014 I found it in a septarian nodule. Link to comment Share on other sites More sharing options...
Doctor Mud Posted December 22, 2014 Share Posted December 22, 2014 (edited) Hi again, This was found in a nodule you say. Where about? The second image is more suggestive of some sort of central element (i.e. from a spine or vertebra). The second shot gives the impression of symmetry. Can you take closer shots (if you have a macro function on your camera) with a brighter light. I'm not seeing anything that is definitely bone yet. Edited December 22, 2014 by Doctor Mud Link to comment Share on other sites More sharing options...
Doctor Mud Posted December 22, 2014 Share Posted December 22, 2014 I would for future posts just keep posting new images on the same thread so that they are all together. This will make it easier for people to see everything in one go and have a better chance at iding your piece. Link to comment Share on other sites More sharing options...
Brett Breakin' Rocks Posted December 22, 2014 Share Posted December 22, 2014 Hi there, Welcome to the forum. This looks like a suggestively shaped concretion to me. I don't see any evidence for bone. Looks like it is coated with some sort of carbonate, probably calcite. I wonder if it could be a partial ammonite piece ... its heavily calcified ... but it has the right shape I think. These are from Texas, North Texas Link to comment Share on other sites More sharing options...
Brett Breakin' Rocks Posted December 22, 2014 Share Posted December 22, 2014 Yeah, looking more at the images it definitely has all of the landmarks of a ammonite partial. I'm no expert but it might be a nice place for you to start for some visual research at least .... Cheers, Brett Link to comment Share on other sites More sharing options...
Doctor Mud Posted December 22, 2014 Share Posted December 22, 2014 Yeah, looking more at the images it definitely has all of the landmarks of a ammonite partial. I'm no expert but it might be a nice place for you to start for some visual research at least .... Cheers, Brett I think you are onto something there Brett.... Link to comment Share on other sites More sharing options...
BobWill Posted December 22, 2014 Share Posted December 22, 2014 (edited) Yes, the second picture is of a septum where the ammonite section broke away from the rest. Flatter in the center, it is folded more as it nears the outer edges where it would form the sutures if present. Round whorl profile, prominent, widely space tubercles at the umbilical and ventral margins, low ventral keel...these may be diagnostic enough if we knew the formation it was found in. Edited December 22, 2014 by BobWill Link to comment Share on other sites More sharing options...
Ptychodus04 Posted December 22, 2014 Share Posted December 22, 2014 I fine a lot of septarian nodules in the Eagle Ford (Upper Britton Formation and Arcadia Park Formation). If that's the case, this is probably Metoicoceras sp. or a large Prionocyclus sp. IMHO Regards, Kris Global Paleo Services, LLC https://globalpaleoservices.com http://instagram.com/globalpaleoservices http://instagram.com/kris.howe Link to comment Share on other sites More sharing options...
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