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Showing results for tags 'callovian'.
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From the album: 2020, a year in review - 3 : cephalopods & gastropods
Gastropod from Saint-Laon (France) - Callovian - collected in october 2020 -
From the album: 2020, a year in review - 3 : cephalopods & gastropods
Ammonite from Saint-Laon (France) - Callovian - collected in october 2020 -
From the album: 2020, a year in review - 3 : cephalopods & gastropods
Ammonite from Saint-Laon (France) - Callovian - collected in october 2020 -
From the album: 2020, a year in review - 3 : cephalopods & gastropods
Ammonite from Saint-Laon (France) - Callovian - collected in october 2020 -
From the album: 2020, a year in review - 3 : cephalopods & gastropods
Ammonite from Saint-Laon (France) - Callovian - collected in october 2020 -
From the album: 2020, a year in review - 3 : cephalopods & gastropods
Ammonite from Saint-Laon (France) - Callovian - collected in october 2020 -
From the album: 2020, a year in review - 3 : cephalopods & gastropods
Ammonite from Saint-Laon (France) - Callovian - collected in october 2020 -
From the album: 2020, a year in review - 3 : cephalopods & gastropods
Ammonite from Saint-Laon (France) - Callovian - collected in october 2020 -
From the album: 2020, a year in review - 3 : cephalopods & gastropods
Ammonite from Saint-Laon (France) - Callovian - collected in october 2020 -
From the album: 2020, a year in review - 3 : cephalopods & gastropods
Ammonite from Saint-Laon (France) - Callovian - collected in october 2020 -
From the album: 2020, a year in review - 3 : cephalopods & gastropods
Ammonite from Saint-Laon (France) - Callovian - collected in october 2020 -
From the album: 2020, a year in review - 3 : cephalopods & gastropods
Ammonite from Saint-Laon (France) - Callovian - collected in october 2020 -
I've been working at this site on and off for several years and decided it was time for another visit. A colleague of mine joined me in my efforts a year or so ago and he's been working diligently at it ever since. He recently informed me that he had opened up an exposure one zone higher up (koenigi) above the one we have generally been working at (herveyi) and had freed up what seems to be a promising row of blocks, judging by the finds he was making. So I figured it was time to have a look. Sure enough, after a couple of hours of hammering and prying, I managed to extricate a good sized Macrocephalites and several Choffatias which were amongst the ever present shell breccia in these turbidites. There was what appeared to be a nice surprise after I removed the next block. I was nevertheless a little wary, since the preservation at this level isn't always optimal, but the only way to find out is to get down to it, right? After about a quarter of an hour, I could see that the outer whorls were pretty rotten and in no condition to be saved. But I figured I might as well remove the overburden and at least try to save the inner whorls. This took about another hour. As you can already see, there are cracks running every whichway through it. No good sign. And once I had extracted it, it became obvious that it wasn't worth saving, particularly since the innermost whorls were nonexistent. Normally if they were there I would have tried to glue it all back together, but like I said, it just wasn't worth it to me. Well, that's the luck of the draw, isn't it? You'll never know until you've tried. I decided then and there that I'd leave that row of blocks for another day and began to hack down through the soft marl below to the row of blocks in the herveyi zone where I managed to dig out a few nice little ones. I found a few more later on, but didn't think to photograph them, since darkness was beginning to set in and I was starting to think about the can of Red Bull waiting for me in the car. Despite the disappointing giant ammo, I must say that this was one of the more successful digs I've done recently. I'll start posting more here once prep is under way.
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Aromasithyris subcanaliculata & Cererithyris fleischeri
Ludwigia posted a gallery image in Member Collections
From the album: Brachiopoda
All are 2cm. long 2x Aromasithyris at the top koenigi zone Early Callovian Middle Jurassic Found in the Wutach area of southern Germany -
Kepplerites (Toricellites) cf. lahuseni (Parona & Bonarelli 1895)
Ludwigia posted a gallery image in Member Collections
From the album: Middle Jurassic Ammonites from Southern Germany
3.5cm. koenigi zone Callovian From the Wutach area. -
I just couldn't resist revisiting the Callovian site again which I recently reported about here. I was figuring on removing some more overburden to get back in at the productive layer. To this purpose I brought along my heavy pickaxe this time. That saved a lot of wear and tear on the wrist, although my elbows were beginning to ache a bit later on in the day, but that was no worse than playing a couple of sets of tennis As usual, my first finds were little stuff. But then the hope-for big one appeared. It also wasn't quite complete in the end, but I'm pretty sure I'll be able to restore the missing parts once I get down to it. I had already begun to hear thunder in the distance as I began working on this and it was starting to get closer. So at this point I figured that my collecting day was soon to come to an end and started packing things away. But as luck would have it, it was just a bunch of noise and nary a drop of rain fell for the rest of the day. I managed to dig out another large ammonite which looked quite promising even after I had removed most of the overburden.
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I guess as you get older, you get a little more crazy. I had sworn to slow down a bit, particularly after my exhausting hike down the mountain recently, so I'd been visiting easy-to-work sites like the ditch and the shark tooth exposure the last few weeks. But then my colleague told me that he'd opened up another section at the Callovian site in the Wutach Valley and that I should have a look at it. Maybe you can make some good finds. Well, why not? So off I went today. At this site you have to remove a lot of overburden to get at the good horizons and then you're whacking away at a hard concretionary sandy limestone in search of fossils. I use a pick hammer and club hammer for those purposes, which makes for a bit of wear and tear on the old tendons. The first 3 hours were not all that productive for my liking. Here's what my efforts had produced up to that point. But then I finally stumbled on something interesting and quite large to boot. The photos above were taken after about an hour of overburden removal. I needed yet another hour to remove the rest, which was absolutely necessary, since the ammonite was resting in the middle of an extremely hard concretionary lager and the chances of breakage were high. I was also already pretty sure at this point that the outer whorls would not survive the treatment, since they appeared to be unstable. Here's how things looked towards the end. You can see where the outer whorls have broken off and after I was able to pry out the inner whorls, I could see that the outer whorls didn't continue around to the back, since those parts were already eroded away. So that wasn't too bad after all and the inner whorls appear to be well-preserved as you may be able to discern below. ø is 16cm. So after this action, my heart was happy, but my wrist was aching like crazy and my legs were about to collapse because of crouching and bending the whole time. So I took a break, emptied my water bottle, and packed the things up for the return trek to the car, which in this case is happily only about 500 meters. I stopped in for roast beef with onions and french fries on the way home, so that pepped me up a bit I've also just discovered that Kytta ointment is good for aching wrists.
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This specimen was found in the Harrison Lake area of southwestern British Columbia, in beds reliably dated late middle Jurassic (Callovian). It appears to be a bivalve shell with two large protuberances emerging from it. The wood-boring bivalves Pholadacea come to mind, but, since I have no record of anything like this from the area, and no experience with these forms, I welcome your comments and suggestions.
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Calcite steinkern. Phragmocone.
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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.
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From the album: Middle Jurassic Ammonites from Southern Germany
8cm. herveyi zone Rotes Erzlager Early Callovian From the Wutach Valley -
I went for my first proper collecting excursion in about a month yesterday (I don't count the bike trips to the shark tooth site, since that's more of a light snack). I'd decided to take another look at one of my old sites in the Callovian in the Wutach Valley. As is sometimes the case, I forgot my camera (sorry), so there won't be any on the site photos, but I thought I could at least show you the best finds which I just finished prepping. First a Pyrgotrochus macrocephali gastropod and then a Kepplerites sp. ammonite. Both are relatively seldom, so I was happy to add them to the collection. The last two are well-preserved Choffatia sp. and Macrocephalites sp. ammonites.
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- callovian
- kepplerites
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Inside of a Terebratula (Glossothyris) Callovian Normandy France
nala posted a gallery image in Member Collections
From the album: Brachiopodes, Shells, corals, sponges......
Inside of a Terebratula (Glossothyris) Callovian Normandy France -
Rugitela biappendiculata lower Callovian Marnes de Donfront Degré France
nala posted a gallery image in Member Collections
From the album: Brachiopodes, Shells, corals, sponges......
Rugitela biappendiculata lower Callovian Marnes de Donfront Degré France -
Torquirhynchia torquata Callovien inférieur Normandy
nala posted a gallery image in Member Collections
From the album: Brachiopodes, Shells, corals, sponges......
Torquirhynchia torquata lower Callovian Normandy
