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Found 27 results

  1. Ammonoid ID

    hi all, anyone know the specific attribution of this genus type or direct to any science-based paper? Macrocephalites? mid-Jurassic. ?
  2. Dear TFF, I have these two Callovian ammonites for exchange. The first is on matrix and wood wax has been applied to it. I would like paleozoic material (especially devonian invertebrates) for my teaching collection, but I am open to other proposals. Thank you.
  3. Macrocephalites sp. (Zittel 1884)

    From the album Middle Jurassic Ammonites from Southern Germany

    8cm. herveyi zone Rotes Erzlager Early Callovian From the Wutach Valley
  4. Peek-a-Boo

    Yesterday I posted something here from my recent trip to the Callovian and now I've just finished prepping something else worth showing. It's a somewhat compressed Macrocephalites jacquoti ammonite with a diameter of 12cm. You may have noticed, particularly in the second photo, that there's a crack running through it. And this is what happens when you open it up. It had already broken into these two pieces as I was extracting it at the outcrop. Instead of glueing them back together as I usually do, however, I decided to leave it as is after I'd abraded the shell, since the view of the crystallized chambers is quite pretty. It makes a nice sort of "surprise egg", don't you think?
  5. A couple of weeks ago I posted here about the working of chemical erosion on some ammonites which I had found in a furrow between 2 fields. I went back there again this week and continued along, pulling out a few more. The furrow dipped down a bit into a sort of hollow where it became obvious that the water had collected there more profusely than above over the years and the finds became more and more eroded until it reached the point where the digging was hardly worth it any more. There were however a couple of quite interesting finds which I'd like to post here. They derive from Macrocephalites ammonites, but have been eroded away to such a point that the (usually invisible) septal chambers and walls can be seen right into the center.
  6. Macrocephalites jacquoti (Douvillé 1878)

    From the album Slices

    10cm. I decided to cut it because of the damage to the shell and I figured that there must be a few good chamber geodes within. herveyi zone macrocephalen oolite Early Callovian Wutach Formation Found on a field near Blumberg in SW Germany.
  7. Macrocephalites jacquoti (Douvillé 1878)

    From the album Middle Jurassic Ammonites from Southern Germany

    13cm. Phragmocone herveyi zone macrocephalus oolite Wutach Formation Found near Blumberg-Hondingen
  8. Some Callovian finds

    I just sort of hijacked one of Nimravis' topics to show these finds, so I figured it'd be better if I continued the story here. I took off for my first proper hunt in a couple of months this morning in the hopes that the bit of snow we'd had hadn't decked the site in the Wutach valley that I had chosen. As luck would have it, it was still relatively pristine, so I was able to spend about 4 hours digging away in a familiar embankment in the search for some nice Callovian ammonites. This time the Gods were with me, so it looks like I've got a bit of prepping to do. The ammos appear to belong mostly to the Macrocephalites family, but there are some other species and also a couple of echinoids represented. I think I'll start with the one on the left. It's a double, although you can't see the smaller one at the top all that well.
  9. Another pair of ammos

    Yesterday I posted a fossil which I found during a walk over the fields in the Wutach area. Earlier on in the day I had spent some time digging at one of the sites in the Callovian. Here are the best ones I found. First a Choffatia sp. (5cm.) and then a Macrocephalites jacquoti (6cm.)
  10. Foraging expedition 1

    I had the whole day available for a prolonged tour on Saturday, so I decided to spend it exploring the sides of the small mountain in the Wutach valley where I've been making some good finds in the Callovian for the last year or so. Since my usual dig is getting tougher to work, particularly since I'm spending more time removing overburden than I am digging fossils, I figured I'd foray on into the unknown in search of new exposures. I spent a good 4 hours clambering about the slopes at the appropriate height and managed to cover about half of the mountain in that time. I did manage to find a few exposures, but they weren't quite at the horizon I was looking for. Never mind. You can't expect to strike a bonanza every time you do some exploring. I then headed back to my usual spot and managed to dig out a few little ammonites until dusk set in. The day was by no means a loss. It just felt good having a little adventure. If the snow holds back, I may head out again next weekend and check out the other half of the hillside. I'll try to remember to take my camera along with me then in order to let you join in. Sorry I forgot it again, but here are some pics of the little ones at least.
  11. Beat up Macrocephalites sp.

    From the album Middle Jurassic Ammonites from Southern Germany

    20cm. A little squashed in places, but affording a few interesting views upon the septal chambers and walls. Fossilization and preservation are amazing things. Again from the Callovian in Wutach valley.
  12. Macrocephalites verus (Buckman 1922)

    From the album Middle Jurassic Ammonites from Southern Germany

    14cm. From the herveyi zone, Callovian in the Wutach valley.
  13. Macrocephalites sp. (Zittel 1884)

    From the album Middle Jurassic Ammonites from Southern Germany

    12cm. From the Callovian herveyi zone (Rotes Erzlager) in the Wutach valley.
  14. From the album Slices

    9.5cm. From the Middle Jurassic Callovian herveyi zone in the Wutach valley.
  15. From the album Middle Jurassic Ammonites from Southern Germany

    15cm. An indigineous species to the Wutach valley. Originating from the koenigi zone, lower Callovian.
  16. Macrocephalites with Serpula

    From the album Middle Jurassic Ammonites from Southern Germany

    Macrocephalites verus (Buckman 1922) with a colony of Serpula sulcata (Adams 1797) tube worms attached. From the herveyi zone, early Callovian in the Wutach valley. Diameter 12.5cm.
  17. From the album Middle Jurassic Ammonites from Southern Germany

    3.5cm. From the Callovian herveyi zone in the Wutach Valley.
  18. Macrocephalites verus (Buckman 1922)

    From the album Middle Jurassic Ammonites from Southern Germany

    5cm. With a pathology of the ribs on the venter. From the herveyi zone, Callovian in the Wutach valley area.
  19. From the album Middle Jurassic Ammonites from Southern Germany

    20cm. My best specimen of this species to date. Complete calcitized phragmocone. Herveyi Zone, Callovian. From the Wutach valley area.
  20. More Callovian finds.

    I decided yesterday to spend one more afternoon digging in the Callovian in Wutachtal before I set off this coming weekend to Canada for 3 weeks. I dug up a gigantic Macrocephalites ammonite which unfortunately was missing the entire phragmocone, so I left it on display by the outcrop. It's pretty hard work breaking out the hard layers of the socalled Rotes Erz Lager (red ore horizon) and chiseling them down bit by bit in the hopes that something's inside, but every once in a while something pops out which is worth keeping, like the 2 finds below which I finished prepping today. Macrocephalites jacquoti with a Belemnopsis sp. belemnite. Macrocephalites jacquoti with a nice view of the septal wall.
  21. Shell preserved. Complete phragmocone with 4cm. of body chamber.
  22. Inner whorls of the phragmocone with shell. Zone index fossil.
  23. Well-preserved shell.
  24. From the album Middle Jurassic Ammonites from Southern Germany

    5cm. From the Callovian herveyi Zone in the Wutach Valley.
  25. From the album Middle Jurassic Ammonites from Southern Germany

    18cm. Herveyi zone, lower Callovian. Found in the Wutach Valley.
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