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Showing results for tags 'toarcian'.
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From the album: Gastropods and Bivalves Worldwide
3x3.5cm. Complete with selenizone (Slitband) Late Toarcian From Zaouiat Cheikh Tadla Azilal Province Morocco -
Spent two afternoons in the workshop prepping some ammonites from the Beacon Limestone, a Toarcian deposit exposed in many places around Somerset, UK. Had a fair few disappointments, including several very large ammonites (for this area - about 8 inches) which had no centres. That's common for ammonites from this location, which is a pain because it often takes a lot of prep through sticky, tough rock before you can tell whether or not there's a centre. But there were some nice ones. I had cautiously high hopes for this large harpoceras... Which turned out justified, because this is one of the best examples of this species that I've found. The inner whorls are typically covered in quite sticky rock, and the surviving calcite steinkerns are often a little wibbly-wobbly in their preservation. I was pleased that this one retains the body chamber (or most of it). This one didn't turn out as well as I'd hoped, so I stopped short of making it perfect. It's OK. Not sure what species this is, but I have found a number with this attractive marbled surface. Two rare ammonites from this location. Phylloceras is a deep water ammonite, but these are shallow sea deposits, so they'd have to drift in. Body chambers are typically missing and they are often otherwise incomplete. I don't know what species this is. But it looks a bit unusual. Let me know if you have any ideas!
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Hi all, Some weeks ago, I found a site pretty rich in brachipods from the Late Pliensbachian/Early Toarcian in my area (Pedraforca Zone, SE Pyrennes) So, I made a parenthesis in my Upper Cretaceous usual issues, for a change, and I have been picking & preparing them last weeks. This site is very well studied in this paper (in French), and in fossilworks. I probably i found all the species mentioned from the site: Telothyris pyrenaica Telothyris jauberti Quadratirhynchia vasconcellosi Soaresirhynchia sp. Soaresirhynchia (Alméras, 1994) (former Stolmorhynchia) is a genus of little brachiopods first described by Alméras in a study about Portugueses Toarcian specimens, but are common in all the Iberian-Pyrenean Toarcian basin, from Portugal to South France. Unfortunately, they show great morphology diversity, and I must confess the I am not be able to distinguish one specie from another (S.bouchardi, S.flamandi, S.rustica). Maybe @ricardo could help. These are some examples: Homoeorhynchia batalleri And finally, the only Liospireferina falloti I found, though in poor condition:
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- brachiopods
- jurassic
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Belongs to the so-called “Koninckella Fauna” from the base of the Dactylioceras semicelatum Subzone.
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Belongs to the so-called “Koninckella Fauna” from the base of the Semicelatum Subzone.
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- cabo carvoeiro fm
- pseudokingena deslongchampsi (davidson)
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Hi, I have found this piece in a well-known jurassic site where brachs abound (Late Pliensbachian/early Toarcian, Tenuicostatum biozone, Iberian-Pyrennes basin) My guess is genus Pleuromya. At species level, Pleuromya rotundata is mentioned in the zone, but I find nothing about it (I fear of an invalid or junior species). It looks like Pleuromya uniformis, of whitch @Ludwigia and @nala have posted some pictures.
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Can anyone please help to ID the structure at the top of this phragmocone? Apologies that the photos aren't better, but hopefully they're good enough. I have seen this structure on other fossils from this location too, but have never been able to work out what it is. The phragmocone is 4 inches long, the unknown fossil is nearly an inch long. It's from the toarcian beacon limestone, in the UK. I'm also unsure what the phragmocone is from. I suspect this is too big for any of the belemnites from this location, so presumably a largeish squiddy thing. Most of the fossils found here are ammonites, with some nautiluses.
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- phragmocone
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From the album: Best of 2018 finds - a year in review
Pseudogrammoceras Sp : An ammonite from Belmont d'Azergues (Rhône) toarcian (Lafarge Quarry) -
From the album: Best of 2018 finds - a year in review
Hammatoceras gr pachu ? : An ammonite from Belmont d'Azergues (Rhône) toarcian (Lafarge Quarry) -
Hammatoceras gr pachu ? 1 - Belmont d'Azergues
elcoincoin posted a gallery image in Member Collections
From the album: Best of 2018 finds - a year in review
Hammatoceras gr pachu ? : An ammonite from Belmont d'Azergues (Rhône) toarcian (Lafarge Quarry) -
Recently you could find "many" bones and teeth in a "Bonebed" in a quarry near Buttenheim in Germany. Too bad I was a bit too late to search in this Bonebed. As I was there it was still possible to find something but the layer was buried under about 1 meter dirt. So I couldn't really find something there. All bones and teeth come from the Toarcian. This thread of @Kasia inspired me to buy some teeth and bones from there too. So thank you for the inspiration Here are my acquirements: I bought three Steneosaurus (crocodile) teeth: The first one is about 1. 3 cm long: Detailed: The next one is a big one with a length of 2 cm. This one was found in Altdorf: The last one is damaged and small (0.8 cm long) Beside of these Croc teeth I also bought some Ichthyosaur material from there: A 1.1 cm long tooth which could be quite nice if someone didn't glued it that bad... I am not sure what I will do with this one because there seems to be another tooth in the matrix and I will maybe try to break it and glue it a bit better. Too bad the teeth are extremely fragile so I am not sure what I will do... And another small Ichthyosaur tooth with a length of 0.6 cm: And last but not least three small Ichthyosaur vertebrae: All three are a bit bigger than 2 cm. All in all I have to say that I am quite satisfied with my purchase expecially because I didn't had to pay too much money for them. Thanks for viewing
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- buttenheim
- crocodile
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Reference here. Comas-Rengifo, María & Duarte, Luís & García Joral, Fernando & Goy, A. (2013). The brachiopod record in the Lower Toarcian (jurassic) of the Rabaçal-Condeixa region (Portugal): Stratigraphic distribution and palaeobiogeography [Los braquiópodos del Toarciense Inferior (Jurásico) en el área de Rabaçal-Condeixa (Portugal): Distribución estratigráfica y paleobiogeografía]. Comunicacoes Geologicas. 100. 37-42.
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- levisoni zone
- telothyris pyrenaica dubar 1931
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From the album: Trace Fossils
21x11cm. Formerly C.bollensis. Burrows (Agrichnia), thought to have been used to cultivate microorganisms for feeding. The white colored substance is caused by sulfates. Posidonienschiefer Formation Early Toarcian Early Jurassic Site: Oehmden near Holzmaden, Germany. -
Went out on a hunting trip at the weekend, and came away with quite a few decent finds. These are all in-land finds from locations near Ilminster, and the finds are all from the Toarcian pediod (182-174m years ago). Please forgive me having forgotten most of the names of the ammonites, I'm not great at remembering them. This ammonite, a Dactylioceras of some kind, is covered in clay which is absolutely full of what appear to be trace fossils from worm activity. This isn't uncommon, but I've rarely seen such a vivid example. Close up: The rear of this large, crushed harpoceras is a jumble of mixed up fossil bits, which you often find in the various layers of the beacon limestone. Top left there is quite an interesting bit of shell, which looks as if it might perhaps be part of a crushed teuthid phragmocone. A nice little double-dac. This is one of the scarcer ammonites from this location (I've forgotten the name), especially at this large size. I have one or two locations I can go to and stand a chance of finding these. They are often heavily re-worked, and this specimen was obviously exposed after fossilisation and heavily rolled on the seabed. It's structurally sound, but the shell - which seems to have been originally preserved - has been almost completely worn away. Such a shame!
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Please could anyone suggest what this is? I'm assuming fish, with little (less than 1mm) white spherules that might be teeth or denticles. From the Jet Rock (Mulgrave Shale Member) - a Lower Jurassic, Toarcian shale at least partly deposited in anoxic waters. Near Whitby, Yorkshire, UK. (Acquired in an auction as an extra with another fossil that I really wanted so I'm just curious really, I know little about fish!)
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At over 4" across, this is the last few chambers of by far the largest diameter belemnite phragmocone I've ever seen. (If anyone has one from a Megateuthis, I'd love to see it! - they don't seem ever to be preserved.) Given to me by a friend, it is in a nodule from the Jet Rock (Upper Lias, Lower Jurassic) of Port Mulgrave, north Yorkshire coast. It must have belonged to an exceptionally large Acrocoelites trisulculosus which is probably the only belemnite to occur in this bed. It's a large species anyway - typical rostra of it are 5 - 7" long but about 9" has very rarely been recorded so a bit longer may be possible. Photo 6: Not having such a large Acrocoelites in my collection, I've done a conservative mock-up of it with a smallish (9") Megateuthis and another piece of phragmocone which is my second largest... A total length of 20 - 24" seems about right. Photo 7: For comparison , I have a complete but crushed example of A. trisulculosus about 12" long, the rostrum being 6.5". 1) 2) 3) 4) 5) 6) This should probably be stretched more... 7) A normal size Acrocoelites trisulculosus with crushed phragmocone (the strange ridged structure on top of it is a crushed on-edge Harpoceras shell mouth)
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- acrocoelites
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Chitinobelus, a strange and rare belemnite? from the Posidonienschiefer
TqB posted a topic in Member Collections
Extremely rare, I never thought I'd get the chance to acquire one of these so I was very pleased when one came up for sale. Chitinobelus acifer Fischer 1981, a belemnite (or possibly belemnotheutid) whose rostrum was originally composed of aragonite with organic material. As a result, it's preserved as a compressed organic film with the aragonite lost to diagenesis. Belemnites are nearly always mostly calcite (largely thought to be primary) and preserve 3D in all sorts of rock. There is argument (quite complex) over whether this is an unusual aragonitic belemnite or something a bit different. There are prominent striations which are similar to those in the "normal" belemnite, Salpingoteuthis. From the Jurassic, Lower Toarcian Posidonienschiefer of Zell (not far from Holzmaden, Germany). As far as I know, this is the only locality it's been found. Phragmocone chambers just visible.
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From the album: Cephalopods Worldwide
2cm. From the early Jurassic Toarcian bifrons zone at Ravenscar, Yorkshire, GB.-
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- catacoeloceras
- ravenscar
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From the album: Cephalopods Worldwide
4cm. Pyritized shell. From the early Toarcian bifrons zone at Ravenscar, Yorkshire, GB. -
From the album: Cephalopods Worldwide
4cm. Found in a concretion at Ravenscar, Yorkshire, GB. Early Toarcian bifrons zone.- 1 comment
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- pseudolioceras
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Pyritized
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Shell preservation
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Hi all, Anyone know what species/genus this gastropod is? Never seen anything like this one before... It's from Rivière-sur-Tarn, a location in France that yields fossils from the Toarcian stage of the early Jurassic (approx 180 mya). Best regards, Max
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Hi all, Anyone know what species/genus this bivalve steinkern is? It's from Rivière-sur-Tarn, a location in France that yields fossils from the Toarcian stage of the early Jurassic (approx 180 mya). Best regards, Max
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Hi all, Anyone know what species/genus this gastropod is? It's from Rivière-sur-Tarn, a location in France that yields fossils from the Toarcian stage of the early Jurassic (approx 180 mya). Best regards, Max
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