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Showing results for tags 'brigantian'.
Found 13 results
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Mississippian mystery ?shell, UK. SOLVED: Isogramma, an unusual brachiopod
TqB posted a topic in Fossil ID
I have seven specimens of these, all with the same appearance and strange internal structure. They have perplexed me for years though I'm familiar with most fossils from the area. (I originally had three and have recently collected four more which enables them to be characterised more reliably. Altogether, five individuals are fairly complete). One small exposure of marine shale, Mississippian, Brigantian Stage, northern England, Co. Durham. The main features are: 1) See photos 3 & 4 -The shell material is strange, being irregularly honeycombed, resulting in a granular a- 63 replies
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- ?fish
- ?arthropod
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After the last one (link here: fish skull ) turned out to be a nice skull, I'm wondering if anyone could ID this bit? It's very 3D and hard to photograph without image stacking so I've given three views. Phosphatic nodule, Brigantian (U. Mississippian) marine shale, Co. Durham, UK. counterpart:
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Anyone recognise this? Phosphatic nodule, Brigantian (U. Mississippian) marine shale, Co. Durham, UK. Nodules from this bed often contain fish bits, as well as cephalopods, inarticulate brachiopods and (rare) conulariids. Not cleanly broken but the shape is ringing a bell... concave counterpart
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This is a scarce crinoid in the Mississippian of my area, usually found here as isolated columnals (and never articulated). So I was pleased to find this group yesterday on my first 2020 trip to a favourite locality in the Durham Dales. Needs a bit of TLC and probably light air abrading (it's fragile) but not bad for a quick brush and rinse. Mississippian, Brigantian, Three Yard Limestone (shale parting), Co. Durham, NE England.
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- co. durham
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Goniodonts - strange echinozoan teeth from the Carboniferous
TqB posted a topic in Member Collections
I was surprised to see this specimen for auction and pleased to win it. It's Anguloserra thomasi, a rare tooth from an ophiocistioid echinoderm and comes from the same locality as the holotype described here (abstract only): Haude & Langenstrassen 1976. I've been interested in these since finding three similar specimens in the UK that took a while to identify - shown in the next post. It's preserved as an impression - most material in this matrix is decalcified. Carboniferous, upper Mississippian, Culm beds (equivalent of Brigantian and Arnsbergian beds in UK), Apra -
Eurypterid or sponge bored orthocone? Revisiting a Mississippian puzzle
TqB posted a topic in Fossil ID
A while ago, I was convinced that this was an orthocone with possible sponge borings though it was never really resolved. http://www.thefossilforum.com/index.php?/topic/77979-strange-infestation-on-orthocone-shell-mississipian-ne-england/& @Al Dente suggested eurypterid as a possibility which I argued against, largely because they've never been found around here. However, a friend of mine has now found some undoubted eurypterid fragments in equivalent beds in Scotland, 120 miles away or so and where the faunas have much in common. He's pretty sure that this is indeed euryp- 11 replies
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- adelophthalmus
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Just reassembled, crinoid stem with a bit of character. Probably Poteriocrinus sp., or maybe Rhabdocrinus, 20cm long, 10-12mm diameter, in a high energy deposit full of crinoid, bryozoan and brachiopod débris. It's unusually well articulated for this bed which mostly contains smaller broken bits of stems, arms and plates. There's a probably pathological swelling towards the top, above the radices. Last photo shows it as collected - very fragile and the main stem had largely broken into calcite cleavage fragments. Prepping so far was just a matter of letting it dry,
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- rhabdocrinus
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A near complete, partly enrolled Paladin sp. found a couple of days ago, lying in three pieces in a pile of disintegrating mudstone. Brigantian stage (Mississippian), N.E. England, UK. I spent ages unsuccessfully looking for the missing bit but never mind, it's still the nearest to a whole one I've found for about four years - decent Carboniferous trilobites are generally hard to come by though moulted bits are quite common at the site. This stuff falls apart when wet and another spell of rain would have completely destroyed it. Apart from gluing, no prepping was needed
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Three productids with most of their spines intact, showing that they looked like hedgehogs. I haven't identified them further largely because I can't see the shells properly. (Edit: likely to be Echinoconchus or similar echinoconchid - see below) These are from a Brigantian (Mississippian) mudstone in NE England, Co.Durham. 1) About 6cm across 2) Interior brachial valve showing spines projecting around the edge from behind. About 3cm across. 3) about 4cm across:
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- brachiopod
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Cornuella, a very rare ornamented cyrtocone, Carboniferous, UK
TqB posted a topic in Member Collections
This post is prompted by finding a near complete specimen of Cornuella cf. ornata, Brigantian, (Mississippian) shale above the Four Fathom Limestone. Co. Durham, UK. Apart from one fragment from the early 19th century I can find nothing comparable in the UK literature.. Fine specimens have been found in Russia from the Serpukhovian Stage (upper Mississippian, slightly later than this one). See at the end of the post for both of these. I previously had just a single, small fragment which was a mystery. A friend then gave me another fine 3D fragment from Scotl- 11 replies
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Hi, I'd appreciate some help with this one, it's got me completely foxed and I can't find anything similar online. The matrix is a mudstone, it was a loose rock in a stream, the rocks in the area are all Brigantian (Upper Visean) - Carboniferous Cyclothem deposits (Northumberland, UK). There were 3 of these, all about an inch long, oval shaped, but fairly irregular, with faint radial lines/corrugations from a central 'spine'. They are three dimensional about a quarter of an inch thick. Small spiriferid brachiopod shell fragments in the same rock are undeformed, so I think the irregular shape i
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A small colony surrounded by Archaeocidaris debris. It shows the obverse side , i.e. the side with pores. It is preserved on the top face of a thin limestone lens that was overlain by shale. This is the most common fenestrate bryozoan in this area but the majority of specimens are found in shale and rarely split to show the obverse as it is the "stickier" side due to the pores.
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A recent post from joshyoowy reminded me of something I found a few years ago. It is about 20cm (7 3/4 inches) across. Carboniferous (Visean). Looking forward to your input.
