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Showing results for tags 'Frasnian'.
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A juvenile lungfish (11cm) from the famous Miguasha fossil site, now a UNESCO World Heritage Centre. Taxonomy from Fossilworks.org. Emended genus diagnosis from Cloutier 1996, p. 199: " Maximum depth of body one-sixth of its total length. First dorsal fin low, with maximum height from one-eighth to one-seventh its length, originating at the level of the fourth supraneural. First dorsal fin 16% of total length without ossified radials; second dorsal fin 30% of total length, and higher than first dorsal fin, itsmaximum height amounting to two-thirds of maximum body depth. Traquair (1893) erected the genus Scaumenacia based on the presence of a "double dorsal fin"; however, the presence of two dorsal fins is plesio- morphic and therefore non-distinctive for the genus. Hussakof (1912, p. 136) provided a series of distinctive features for Scaumenacia, some of which are used in the amended diagnosis." Diagnosis for the spcies is identical. Line drawing from Cloutier 1996, p. 207: Identified by oilshale. References: J. F. Whiteaves (1881) On some remarkable fossil fishes from the Devonian rocks of Scaumenac Bay, in the Province of Quebec. Journal of Natural History 8(44):159-162. O. P. Hay (1902) Bibliography and Catalogue of the Fossil Vertebrata of North America. Bulletin of the United States Geological Survey 179:1-868. R. Cloutier (1996) Chapter 18 Dipnoi (Akinetia: Sarcopterygii) in: Devonian Fishes and Plants of Miguasha, Quebec, Canada. Publisher: Verlag Dr. Friedrich Pfeil, München, Editors: Hans-Peter Schultze, Richard Cloutier.
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This “fossil?” Confuses me. Is it even a fossil? The shape throws me off makes me think its artificial but i found it in the middle of nowhere on rocky river shore. Geological?
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Another driveway find. Is this a sponge of some kind or possibly and bone from dorsal fin? Kind of looks in the shape of the ulna i cant find any reference on what an isolated one looks like. Can bones be calcified like this? i have no idea.
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This weekend we finaly got out after those long months of lockdown. This time I am prepping a gephuroceratid that Natalie found. They are often found on top of the limestone banks, but this time she found one peeking out the center of the limestone bank. The position of the fossil didn’t make the prep any easier, since I had to grind away as much as possible of the matrix with a powertool without cutting in the fossil. Luckily I just missed a 2d goniatite hidden in the matrix with the grinder. After 4 to 5 hours of prepping with grinder, chisels, with air scribe and a finishing touch of color deepener for marble, this is the result: 2 Manticoceras sp. Late Devonian ( Frasnian ) Lompret ( Belgium ) As found: Step by step:
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Finally time to go back in the field after that long period of confinement . So this Saturday we went back to the Ardennes to prospect Frasnian ( Late Devonian ) deposits. Not a lot of finds, but it was good to be in the field again, and Natalie did find some nice quality fossils. Enjoy the pictures : A placoderm fragment: Bryozoa: not a fossil coral nodule with a few Tornoceras: same piece after a little work:
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It has been a while since I've posted on the forum, so here is a prepwork from this weekend It is a late devonian orthocone, it was quite a hustle to get this out of the rock, it broke in 3 pieces during the extraction in the field. Only a part of the shell was exposed, so I took a whole lenght of matrix back hoping that it contained a whole specimen, and it did The prepwork went realy well, and even the tip of the orthocone was preserved. The 3 parts glued back together, showing only a glimps of the orthocone: clearing out the fossil: a bit of marble treatment on the shell and done
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I have acces to a more powerfull compressor since last week, so the past few days we have been quite bussy prepping lots of fossils. Those are some of my late devonian fossils I have prepped, this is my favorite one to start with, not only does it have 2 cinds of goniatites but I found it at adifferent location than the one I usualy prospect. Manticoseras sp and Tornoceras sp. Late Devonian ( Frasnian ) Nismes ( Belgium The next pictures ar all from my usual location near Chimay ( Belgium) (can you spot the intruder in the next few pictures? )
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I finaly got around putting all my best cephalopods specimens that I collected over the past 4 years in the frasnian of southern Belgium on there place in the cabinets. They all come from the same location. (except an orthocone and a receptaculites from the same age but from a different spot ) most of it has already been posted in individual posts, but this gives an overal vieuw of the part of the collection on display. Enjoy al the Manticoceras, Crickites, Tornoceras, Bactrites, Orthocones and more
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Quick fieldwork in the devonian before the storm
Manticocerasman posted a topic in Fossil Hunting Trips
Saturday we went back to the south of Belgium to check out the quarry where I like to hunt for goniatites. The last 6 months there was litlle activity in the quarry and I was hoping that things had changed by now and the would have dug further, but alas there stil was no change. Still the bad weather and the storms of this winter cleaned out a lot of debris, we did find some nice fossils. At 1 pm we had to give up searching and ran back to the car due to heavy downpour and wind. Start of the day, gray and windy , but still dry: ptospecting the rubble , the first fossils apear: A big goniatite in the mud: Carinoceras sp. some parts of the shell missing. peeking out of the dirt: A little game for the TFF members, find the goniatite: the 2 best finds of the day: From Natalie a cute piece of placoderm: For me, I picked up a crinoid calix, I still have to remove some of the sediment around it: And we brought this one home to show to@Tidgy's Dad a large brachiopod
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This Monday we went on the last fieldtrip for this year, the weather forcast was cold but sunny so a good excuse to get out. We took te dog along and went to the quarry, A lonely excavator was operating in the far end of the pit, I went for a quick chat to let him know we were prospecting in the other side of the quarry and to ask if it was no issue for him. The fossil rich deposits had'nt moved since our last visit, but we still did find a few cephalopods. Natalie found a very promising one, the goniatite looks to be preserved completely in white calcite, I cant wait to get that one out of the matrix. For me the find of the day was a rare Carinoceras sp. goniatite , I have only a handfull of those at home, but this one is very well preserved and not compressed. Enjoy the pictures: Toto the dog prospecting the slates First goniatite of the day credits yo Natalie. a Tornoceras sp. A nice loose orthocone on the scree pile: The wite goniatite from Natalie: A large but wethered one on the scree pile. The Carinoceras sp.
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This saturday Natalie and I went on a fossil hunting trip to my favorite huntingspot in the hope to find a few devonian cephalopods. The weather conditions were cold but sunny to cloudy and the rain of the last week removed the dust from the rocks (although making the place muddy ) Not a lot had changed since our last visit, no expansion in the quarry or new scree piles so it didn't look verry prommising. But with a little perseverence we did get our haul of goniatites and orthocones. most came from the upper parts of the quarry so the were a bit wethered, although Natalie found a few very nice specimen. My best find was a rare nautiloid, but I have to prepp it out to see how it will turn out. after the hunting trip we visited an old marble quarry hidden in the forests in the area: Enjoy the pictures some vieuws of the area when leaving the quarry: some of the finds of the trip:
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Last weekend we went to a fieldtrip with the BVP ( Belgian Associaton for Paleontology ) to my favorite quarry We had the opportunity again to prospect the frasnian deposits around this fossil reef. There hasn’t been a lot of activity in the quarry since last time, so the finds were less frequent than normal, but we still did find a decent haul of fossils, mainly cephalopods. The great weather conditions and the good company made this a very fine fieldtrip and ended with a visit to a local tavern for a few refreshments. (pictures by anthonie Hellemond (c) )
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It has been a while since we went to my favorite hunting spot near Chimay in Belgium, so I was realy eager to go back when we got there we had a little surprise, the whole back of the quarry was transformed in a motor cicle trail, apparantly this sunday there wil be a race and a lot of the bikers were prospecting the trail on foot in preparation of the race. luckily this didnt hinder us on our search, and this opend even opportunities since they dug through some of the stoone piles to make the trail thus revieling new material to go through, although we were careful not to dammage the trail. my first find was a strange large nodule covered in mud, at first vieuw it looked to be a big goniatite, and since it was found near the car I directly put it in the trunk without giving it further ispection. after looking on the sides of the new tracks we went to the big scree where we usually hunt, the heavy rains from the past few weeks cleared a lot out and we did find a few very well preserved goniatites. On the top of the scree pile Natalie found a huge specimen: a goniatite of around 40cm an not far from it I found a 2nd large one . we had a very sccesful field trip today with great wether conditions ( mabey a little to hot ) and excelent finds. my biggest surprise was when I drove home, I stopped at a self carwash to clean of the mud of the big specimens with a high pressure cleaner. The first mud coverd nodule that I put in the car wasn't a goniatite, but a nodule with 3 nautiloids on it, 2 incomplete, but a big one in the center. A vieuw on the race track: A toad hiding in the rubble. Natalie at the spot where she found the big goniatite: the huge specimen she found: and a 2nd one : A lot of life in the pools in the quarry: A realy nice Manticoceras sp waiting for me more shales and limestone to go through: A stop for water and snacks after the hunt, and of course a lot of local beers on sale "Chimay" beer: the large specimens after the high pressure cleaner: the surprise Nautiloids after the mud was removed: I still have alot of unpacking to do and prepp work in the next few days. I'll post updates in this post.
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I recently got a new job, and to make things even better, my job is at a company who processes and places floors and walls in stone, mostly marble. This opened a few opportunities for me , having access to a huge amount of polishing and cutting tools, so this week I gave it a try: I took 2 of my Goniatites that weren't of top quality, or to hard to prep. and today the helped me to cut the fossils and polish them. The fossils turned out really well here are my first 2 polished Manticoceras sp. from the Frasnian layers of Lompret in Belgium: before polishing them: after cutting and polishing: top goniatite: Bottom Goniatite: both of them: And a question for the moderators: the fossils have been cut and polished today, but were found earlier this year, are they valid entries for FOTM since al the cleaning , cutting and polishing was done now? Thx Kevin
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Back to the late Devonian with a touch of Cretaceous.
Manticocerasman posted a topic in Fossil Hunting Trips
Last weekend we made a trip to my favorite Devonian hunting spot. As usual we found a few goniatites, but apart from this we found a lot of smaller fossils like brachiopods, crinoids and even a bivalve. and a few other nice surprises. The small bivalve: glyptohallicardia sp. 2 valves and pyritised, only a few mm wide with bot halves preserved. a very nice crinoid calyx a tiny brachiopod ( Lingula ) One of the best finds of the day was a fish tooth, I’m still unsure on the species, but I think something in the area of a Euchondrocephalid like Helodus. It the my oldest tooth in my collection Still, I did find an even better fossil , I’ll let you speculate on what this might be, but for now it is packed in the trunk of my car and I’m going to drop it off to the local institute Halfway on the way back home we spotted a construction site with a little bit of chalk coming out of the ground, we stopped for a prospection and came back with a few incomplete echinoids and 2 belemnites . So it is always worth to stop at an interesting looking spot.thumb.jpg.d5c535aed37d487665a3287dbc430d61.jpg)
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Today we had a field trip with the "Lithos" geology club at my favorite hunting spot. Although the day started with freezing temperatures, the sun quickly rose the temperatures during t morning and gave us a beautiful day. the last time I visited the quarry the finds were disapointing due to the lack of activity in the quarry, but today we were lucky and the past week a new acces road was being dug to the side of the quarry, straight through the Matagne slate. It didnt take long before I found my first fossils, at first a few halve goniatites, but after a while a complete large specimen and a nautiloid that I had never seen before at this locaton. we searched further in the quarry where we found the spot where the rest of the slate was dumped, resulting in a couple extra goniatites, one of them was an exquisite specimen and a 2nd nautiloid. Note that al the goniatites this time weren't Manticoceras specimens, but an other Gephuroceratinae: Crickites sp. they differ from the former with a more bulbous shape and large size ( up to 30cm in diameter ) In the afternoon we prospected the usual scree piles at the back of the quarry where we found a multitude of small pyritised cephalopods and I even found a broken nodule with very rare placoderm remains. Natalie also found a large and complete Crickites sp. at this spot This day turned out to be one of my most productive days at this location.
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Yet again a Manticoceras prepp my last few preppjobs were very succesful, and inspired by what @Ludwigia did on a larger one that I sent him, I tried to prepp one of my larger Manticoceras specimens. I tried a few new tricks to prepp this one, although the living chamber got dammaged, I decided to remove even more of the living chamber to show more of the inner shell with suture lines. It turned out quite well: Manticoceras sp. diameter 16 cm Frasnian ( late devonian ) Chimay area ( Belgium ) as found: ( top left specimen ) removed from the large chunk of matix: ( and glued back together, not everything went acording to plan ) during prepp: the end result:
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This week I've been prepping a few goniatites that I had lying around. This one didn't look very promising, but what a surprise I got when I tried to remove it from the matrix. a few hits with the chissle and it came out perfectly. I just had to remove the extremities and clean out the center with an airscribe. It turned out to be one of my best specimens Yet an other Manticoceras sp. for display
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I've always wanted one of these and it's just arrived! I spotted it on the usual auction site where it was being sold by an antique seller as a possible fish in slate . It is true slate but is a legendary Delabole Butterfly, a metamorphosed Cyrtospirifer extensus, almost certainly from the Delabole slate quarry in Cornwall, UK. Although quite famous and widely referred to, there's not that much solid information. They appear to have been sold to tourists, largely in the 19th century and this split specimen seems typical. I think they're quite rare though - most photographed specimens seem to be in museums. Many years ago, I wandered around the edge of the quarry and managed to find one small fragment in the waste. Devonian, Frasnian, about 4" across. ,
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Although the most pieces of my collection are goniatites, I am more than happy to add other Devonian cephalopods to my collection from time to time. On my last field trip for devonian cephalopods I splitted a few nodules and some of them had a few uncommon fossils in them: Bactrites I rarely find decent fragments of them, but those few were looking promising. Bactrites, although they look like an orthocone are in fact straight Ammonoids and not a Nautiloid. the septas start to be slightly ondulated, but most important they have a ventral siphuncle, a typical trait of an Ammonoid. the first nodule had a fragment sticking out, and when I split the nodule another one was found inside. I kept both parts of the nodule and prepped the one inside and on top After prepping them I found out that neither of those were complete, but the were decent in size and well preserved. The second nodule on the other hand hand was much better, a piece of the Bactrites was sticking out from both ends of the nodule, so I new I had a complete specimen. The prepping was relatively hard as different parts of the cone had different forms of preservation, but in the end I got the whole specimen out of the matrix and is my best Bactrites until now. enjoythe pictures: 1st nodule with the specimen inside: after prepp: After prep with the top of the nodule containing an other fragment. prepp on the 2nd nodule: after prepp, with the different kinds of preservation visible: and the whole lot:
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Yesterday I visited my favoriet hunting spot with a few friends. Since the weather forcast was realy good we made sure to bring a portable bbq, meat and drinks. Me and my girlfriend were the first at the location, we made a quick prospect for devonian cephalopods, but there hasn't been a lot of activity in the quarry since our last visit. Once the group was complete we tried our luck in older parts of the quarry, but only a few cephalopods were found. At lunchtime we set up our little bbq and equipment and enjoyed our lunch ( this was fossil hunting in style ) the afternoon we continued our search for fossils. only one extra large goniatite was found by a friend, on the other hand, my girfriend made an exellent discovery, she found a large piece of placoderm that is likely to belong of the same specimen we found last year, it wil soon join the rest of the pieces that are being preped at the museum now. On the way home we made a quick stop for prospection in an other quarry, but appart from a few nice calcite cristals we had no luck here. Still, we had a realy fun day one of the 2 goniatites I found that day: Lunchtime Hexagonaria next to the BBQ: the placoderm fragment found by my girlfriend ( Natalie81 ) The large goniatite of my friend calcite crystals from the next spot:
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Volcanic Eruptions Led to Mass Extinction 370 Million Years Ago ??
Oxytropidoceras posted a topic in Fossil News
Mercury Rising: New evidence that volcanism triggered the late Devonian extinction, Geological Society of America, May 1, 2018 https://www.sciencedaily.com/releases/2018/05/180501161805.htm Volcanic Eruptions Led to Mass Extinction 370 Million Years Ago http://www.sci-news.com/geology/volcanic-eruptions-late-devonian-mass-extinction-05967.html The abstract is: Grzegorz Racki, Michał Rakociński, Leszek Marynowski, Paul B. Wignall. Mercury enrichments and the Frasnian- Famennian biotic crisis: A volcanic trigger proved? Geology, 2018; DOI: 10.1130/G40233.1 https://pubs.geoscienceworld.org/gsa/geology/article-abstract/530692/mercury-enrichments-and-the-frasnian-famennian Related papers are: Courtillot, V., Kravchinsky, V.A., Quidelleur, X., Renne, P.R. and Gladkochub, D.P., 2010. Preliminary dating of the Viluy traps (Eastern Siberia): Eruption at the time of Late Devonian extinction events?. Earth and Planetary Science Letters, 300(3-4), pp. 239-245. https://sites.ualberta.ca/~vadim/Publications-Kravchinsky.htm https://sites.ualberta.ca/~vadim/Publications-Kravchinsky_files/2010-Courtillot et al - Preliminary dating of the Viluy traps.pdf Kravchinsky, V.A., 2012. Paleozoic large igneous provinces of Northern Eurasia: correlation with mass extinction events. Global and Planetary Change, 86, pp. 31-36. https://sites.ualberta.ca/~vadim/Publications-Kravchinsky.htm https://sites.ualberta.ca/~vadim/Publications-Kravchinsky_files/2012-Kravchinsky - Paleozoic large igneous provinces of Northern Eurasia- Correlation with mass extinction events.pdf Ricci, J., Quidelleur, X., Pavlov, V., Orlov, S., Shatsillo, A. and Courtillot, V., 2013. New 40Ar/39Ar and K–Ar ages of the Viluy traps (Eastern Siberia): further evidence for a relationship with the Frasnian–Famennian mass extinction. Palaeogeography, Palaeoclimatology, Palaeoecology, 386, pp. 531-540. http://paleomag-ifz.ru/en/articles?page=1 http://www.paleomag-ifz.ru/sites/default/files/articles/ricci_et_al.pdf Carmichael, S.K., Waters, J.A., Batchelor, C.J., Coleman, D.M., Suttner, T.J., Kido, E., Moore, L.M. and Chadimová, L., 2016. Climate instability and tipping points in the Late Devonian: detection of the Hangenberg Event in an open oceanic island arc in the Central Asian Orogenic Belt. Gondwana Research, 32, pp. 213-231. https://pdfs.semanticscholar.org/270e/8f86bcc9677b802e049640d2dc8f8ab01652.pdf Yours, Paul H. -
Last saturday my girlfriend and I went back to the south of Belgium to go hunt for my favorite fossils. On the way there we saw a new road under construction where cretaceous chalk was visible. We made a quick stop to chek it out, but we only found 2 bellemnite fragments. So we hit the road again to the devonian rocks. The weather was quite good for this time of the year, so it was no suprise to see some fellow fossil and mineral hunters on the site. Some new heaps on the side of the field got my attention. Here I made my first good find of the day. A goniatite anaptychus. I was missing this in my collection. So I was verry pleased with it. The rest of the morning most of the finds were made in situ by Natalie, 2 decent sized Manticoceras and 2 Carinoceras specimens. She also managed to find a trilobite fragment. Also the first trillo adition from this quarry to our collection. At noon we were joined on our hunt by a friend. We then got to the large dirt pile at the end of the quarry whera a few other people were looking for smal pyritised cephalopods. After a few chats with the other fossil hunters about the cephalopod fauna the showed me a huge Goniatite they found earlyer that day. I had rarely seen a specimen like this. My surprise was even greater when they offerd this specimen for my collection since I specialise in this kind of fossils. Again lots of thanks if that person reads this thread, it wil get well deserved attention and preparation. The rest of the day we spent on the large mound picking up various fossils but my find of the day here was a incredible crinoid calyx. The trip turned out to be one of my best on this location. Cheers. Manticocerasman I'll upload the photos in the next post
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Old time Devonian coral specimen from Devonshire, UK. Frechastraea
TqB posted a topic in Member Collections
Specimens of corals from the Devonian limestones of Devonshire in England are hard to come by nowadays - this is one I've just bought and repolished. It's likely to be a 19th century sample from when the quarries and marble trade were flourishing - many such pieces were sold then as scientific specimens, and many more were used decoratively. Frechastraea sp. , Givetian/lower Frasnian, Torquay area. The brass scale bar is 1cm long.
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Dear Guys, I noticed many different forms of Lungfish dental plates in my collection, especially from Late Famennian dolomites from the Zagare quarry. Please help to identify genera of these teeth, if you cannot do it then please help to find a specialist on this type and age of remains if you could. Best Regards Domas
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