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Showing results for tags 'sutures'.
Found 5 results
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Is this a chain coral between the sutures of the ammonite Metoicoceras? About 4mm long (photo taken thru microscope). From the Cretaceous (Cenomanian) Tropic Shale in Utah.
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I can't seem to find an ID for this find. I believe this may be a siphuncle. What do you guys think? The "V" shaped sutures are really throwing me off. Has anyone seen a straight shelled cephalopod with this "V" pattern? Kinda neat how you can see how this was buried, preserving one side as it weathered the other. Then along came a dozen crinoids or so a used it as a nice base.
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Hi all, Here is one of the Aconoceras nisus ammonites I found in Carniol, prepped. Now unfortunately the center is gone Luckily... it has some incredible sutures! They are very nicely visible, and give the ammonite a really cool look IMO. The real reason for the sutures to be so clear is actually because there is still a bit of clay in between the suture lines. So to be perfectly honest, that means that the prep isn't 100% complete. But I'm purposefully gonna leave it as it is, because this way the wonderful really stand out. Pyrite ammonite Aconoceras nisus Carniol, France "Gargasian", Aptian, Cretaceous (120 my) Found 22/7/2018
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I dug up this relatively large (19cm. diameter) phragmocone of a Choffatia sp. ammonite on my last visit to the Wutach valley. It was obvious to me at the time of extraction that parts of the outer whorls were missing, but I decided to take it home anyway, thinking that although it was worth a closer look, I'd probably end up disposing of it. Well, in the end I didn't , since I found that the calcitic steinkern preservation of the outer whorls with the nicely pronounced sutures and the shell preservation on the inner whorls on one side warranted that I keep it in the collection for the time being.
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large file Might be gone soon http://rstb.royalsocietypublishing.org/content/royptb/250/763/79.full.pdf
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