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Found 5 results

  1. 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.
  2. 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.
  3. Ludwigia

    Nice Septal Suture Lines

    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.
  4. Ludwigia

    Involuticeras involuta

    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.
  5. Ammonoid

    Cretaceous Halysites?

    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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