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Showing results for tags 'sutures'.
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This was found last weekend in the Mounds Reef area and the Ammonite species is Placenticeras pseudoplacenta. The concretion had already been opened by a previous person or less likely weathered out naturally. Anyway this was all there was and I have tuned my eyes for this shape since finding 4-5 partials, one intact inside the concretion and another that had been passed over for looking like a "boring" smooth clamshell to someone else. Is the best way to reveal the sutures the same as polishing rocks or Damascus steel? Start coarse and up the grit until the shine is mirror like? Or use a chemical like muriatic acid? Two different angles of lighting. One pass with 120 grit, skipped to 1,000 grit, then Dremeled some red rouge for a super quick, cheater reveal. They were unseen before hand.
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- ammonite
- partial fossil
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Our local geological society does a small but very nice "Earth Treasures Show" about this time every year. While most of what I picked up were more in the line of mineral specimens, I did score one fossil this year. Nothing spectacular, I realize, but better than anything I've collected on my own. Nice sutures. Incidentally, I just got volunteered to be our program director, which means I'm in charge of finding an interesting speaker every month. With COVID, we've been meeting by Internet the last few months, which has actually expanded our scope for speakers not from our area. If any of y'all know of a paleontology or geology speaker who gives a great talk, who might be interested in doing an online for us, I'd be much obliged. We usually have a pretty appreciative audience -- both professional and amateur earth scientists, many from Los Alamos National Laboratories, though we're a hobbyist club rather than a professional society.
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- baculite
- pierre shale
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From the album: Sketches
Found in the hypselocylum zone, Early Kimmeridgian, Late Jurassic outcrop in the Upper Danube Valley in southwestern Germany. The septal suture lines on this specimen are particularly attractive.-
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- involuticeras
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I chose this Involuticeras involutus from the German Early Kimmeridgian for my next fossil project because of these great suture lines (we call them Lobenlinien in Germany) and spent a lot of time trying to get them right. It's not quite a perfect reproduction, but I think I managed it ok with the help of a bit of artistic licence.
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- involuticeras
- lobenlinien
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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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- cenomanian
- coral
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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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- cephalopod
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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