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Showing results for tags 'tabulata'.
Found 15 results
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Found in glacial till on top of Ohio Valley knobs in southern Indiana.
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Hoooooooooooorrrrrrrrrrrraaaaaaayyyyyyyyyyy!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Here we are at last, into Adam's Silurian. Thanks for looking. First up is the Lower Silurian or Llandovery and I begin with a problem. I posted this one incorrectly in Adam's Ordovician as it had got it's label muddled up with an Ordovician Favosites I had that has vanished in the move here, but is being replaced by kind forum member @Herb Anyway, this, I remember now I've found the correct label, is from the greenish Browgill Formation, part of the Stockdale Group from a cutting near Skelgill (Skelghyll) in Cumbria, Northern England. It seems to be a tabulate coral, but I can't find any listed for this location, only mentions of small, rare, rugose corals. It has the star shaped corallites of a Heliolitidid, but seems to be tightly packed together like a Favositidid. A couple of species of Palaeofavosites seem to be close and are a bit star-shaped,, but anyone know any better? @TqB@piranha hmm who else? The coral bit, an external mold, is a maximum of 3.5 cm across and each corallite up to 2 mm.
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I am fortunate enough to have such a huge amount of Middle Devonian Givetian material that I thought it best to put the older Middle Devonian stage, the Eifelian, in its own thread. There are some spectacular fossils here as well though! I thought a good place to start would be in the Formosa Reef, which I believe is quite early Eifelian. This tabulate coral and stromatoporoid reef continues similar complexes found from the Middle Silurian, see my: https://www.thefossilforum.com/topic/84678-adams-silurian/page/3/ thread from page three onwards for details. All these Formosa Reef specimens come from a delightful gift from my good friend @Monica who is a tad busy with life at the moment but is fine and still thinking of the forum. This outcrop can be found on Route 12 near Formosa/Amherstburg, Bruce County, Ontario, Canada. This beautiful-looking specimen came to me with only a third of it revealed but I managed to get it this far after nine days of painful pin prepping. Monica found another one and posted it for ID here: https://www.thefossilforum.com/topic/105528-weird-circular-imprints-formosa-reef-lower-devonian/#comment-1172285 The specimen was identified by another Canny Canadian @Kane to be the little stromatoporoid sponge Syringostroma cylindricum. Hardly a reef-builder, but gorgeous nonetheless. It does have a little thickness to it, but not much. Beautiful! Pretty thin, actually. I love this Monica, thank you!
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- acanthopyge
- acanthopyge contusa
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A nice Dictyonema flabelliforme dendroid graptolite from Oslo Fields in Norway. It's Tremadoc, Lower Ordovician in age and is thus maybe around 480 mya. Another angle :
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- amplexopora
- amplexopora septosa
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The Devonian period is known as "The Age of Fish", but could also be known as "The Age of Brachiopods." In the Early / Lower Devonian, brachiopods reached the height of their diversity towards its end in the Emsian. We see the ancestral groups occurring, lingulids, craniids, orthids, protorthids, pentamerids, rhynchonellids and strophomenids, as well as the later successful groups we have seen before such as atrypids, athyrids and orthotetids, plus the rise of spiriferids, spiriferinids and productids and the beginning of the terebratulids. By the end of the Devonian , several of these groups are extinct or severely reduced in importance and brachiopods never quite recover. Also, the Devonian is the last time we see trilobites with such variation, large sizes and numbers and orthocerids too are much more uncommon after the rise of the goniatites. The massive tabulate coral reefs also disappear after the Devonian. Fascinating period and I hope to share some of its wonders with you. Equally, a lot of this is rather new to me, so I would be very grateful for any assistance, corrections or further information on my specimens. Thank you. The Early Devonian epoch is split into three stages, so let's start with the first of those, the Lochkovian, that began about 419 mya and finished roughly 411 mya. I have been sent a nice selection of brachiopods from the Kalkberg Formation, Helderberg Group by the Mighty @Misha, mostly. But the kind gentleperson also sent me this fascinating little bryozoan hash : It is dominated by fenestellids, which is usually the case in the Devonian, but other orders sill occur. These ones, I think, are Fenestella, but there are so many species in the formation that I wont take a guess as to species : Not sure what this one is ;
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- aguion formation
- area de bonar
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I found this Favosites turbinatus today while fossil hunting in Louisville, Kentucky. The problem is it was mixed in with Ordovician age fossils such as Hebertella occidentalis and Platystrophia ponderosa. The area was very eroded and it could have just been jumbled up with the other fossils. Do you think this is what it is?
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I found this in an abandoned fish nest in a human-made lake. One of my favorite finds!
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Fossil is from the Silurian of Gotland, though I am not aware of the precise stratigraphic unit from which it originates. On a broad classification level I'm virtually certain it's a tabulate coral (as you can see tabulae on the third picture), but while my initial hunch was that it's Favosites sp. I'm getting less and less sure the more I look at it. I have another Favosites specimen that I'm 100% sure about, and when I compare it to that, it definitely seems like there's subtle differences - at the very least, we'd be talking about two different species. In the last pic I've posted a comparison between the fossil in question (bottom) and a definite Favosites specimen (top). Also, what's with the random borings? To me they seem a bit too regular to just be normal geological wear and tear - some sort of trace?
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Location: Hancock County, Illinois USA Limestone Quarry 150ft below surface what type, age and what are the 1mm round nodules with possible stems on the facing side in first picture. any other info greatly appreciated.
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Hi guys! I was in the Warsaw Geological Museum and there I came across this specimen which reminded me of Tabulate coral, but it was signed as a "sponge"... The sponge from the "maastrichtian age", when Tabulata already was extinct. I couldn't be more confused. This one still looks like coral to me. What do you think?
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- coral
- cretaceous
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Timor West Basleo Sonnebait formation Fossils ID if poss please
Timorgirl posted a topic in Fossil ID
Hi Fossil buffs, I trust that you are staying safe and well. I have finally pulled my head out of my uni books...yes I graduated.,.and am rediscovering my Timorese fossils. Leading out here... 1018 Tabulata and....I have no idea but would appreciate a heads up if you do know. Do you think 1020 is Mammoth? And I would really like to know what type of BI? Brach? 1019 is.,..this one showing lovely internal crystal form. And 1021 some have speculated that it is an aggravation on a crinoid stem,,,,any other thoughts. Also 1024...crinoid anal sacks ? 633 i found on the surface of a fossil site that was predominantly ammonites...there were some very interesting ammonites. And 792/793 have been speculated as either fossilised dinosaur poo or a gastropod that has gastro..... with a blown up belly fossil...any thoughts? Thanking you in advance and stay well stay sane....look at your fossils often..thumb.JPG.62e1db5e94a6aa2091c0c5bfa691a9ef.JPG)
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Ahoi, I have been lucky to find some real fossils out in nature today! That is not as often the case for me as for some of you lucky rockhounds, I often have to resort to hunting online or building replicas. But this time I went out and found something. There is a famous devonian reef preserved in grauwacke some 50 kilometers from where I live. the Quarry itself is protected, but there are some piles of overburden rock in the vicinity. Here is a sample of what I found: To the right (1) I think is a badly preserved solitary rugose "horn"coral. To the left (5) a "ball" of favosites? The closest match I find for the big piece in the middle (3) is disphyllum quadrigeminum (No idea about species level, but it seems there are also solitary species of Disphyllum) The remaining two (2&4) may be one species, but I have no idea. I would appreciate clues on the ID as much as on where to find more information on identification of devonian corals in general. Its getting dark, so I will try to take better fotos tomorrow. Best Regards, J
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Some Fossil Hunting in the Plabutsch-Formation of the Palaeozoic of Graz, Styria, Austria (Devonian – Eifelian)
FranzBernhard posted a topic in Fossil Hunting Trips
As there are some polished fossil-rock specimens from this formation in the Christmas auction, I would like to present some background info with (mostly) some field photographs, so I have put this in “Fossil Hunting Trips”. The Palaeozoic of Graz is a thrust sheet within the Eastern Alps, composed of Silurian to Pennsylvanian sediments. It consists of three separate nappes, the most fossiliferous formation is the Plabutsch-formation within the Rannach nappe. This Devonian formation is of Eifelian age (ca. 395 Ma), about 100 m thick and mostly made up of a very dark, gray-blueish to black, fine-grained, thickly bedded limestone. Superficially, it weathers to a medium to light grey color. Geological map of Styria with the Palaeozoic of Graz situated north of Graz. Stratigraphic column of the Rannach nappe of the Palaeozoic of Graz, Plabutsch-formation is Nr. 4. From Hubmann & Gross, 2015. Thicknesses of formations are not to scale! The Plabutsch-formation crops out at various places to the west and north of Graz and more than 100 fossil sites are known within this formation. The most abundant fossils are corals, brachiopods, stromatoporids and crinoid fragments. Other fossils like gastropods, bivalves or trilo-bits are very rare. In a paper from 1975, about 50 coral species are listed, but less than 10 are abundant: Tabulata: Favosites styriacus Penecke, 1894 Pachycanalicula barrandei (Penecke, 1887) Thamnopora boloniensis (Gosselet, 1877) Thamnopora reticulata (Blainville, 1830) Striatiopora? suessi Penecke, 1894 Rugosa: Thamnophyllum stachei Penecke, 1894 Zelophyllia cornuvaccinum (Penecke, 1894) Do you feel that there is something strange with this list? Yes, it is! Most species have their type locality within this formation and were first described by Penecke, except T. boloniensis (T. reticulata was also erected by Penecke as Pachypora orthostachys and later synonymized with an earlier described species). In my opinion, this does not reflect a high degree of endemism, but an urgent need for revision… The most abundant fossil is Favosites styriacus, which can form massive colonies up to 0.5 m in size. Here is an example from Hohe Rannach Mt. (1018 m) north of Graz, photo 05/26/2018, Col-Nr. 4093, length of pocket knife is 9 cm: As most fossils in this formation, it was found in scree and float in a wooded area. Nr. 4093 is waiting near the pocket knife toward the lower right corner… Another Favosites styriacus, north of Fürstenstand Mt. (754 m), northwest of Graz, photo 10/30/2015, not in collection. Tabulae are very well visible, weathering is usually your friend there!
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Hi! I just received a couple nice works on Fossils. In Index Fossils of North America (1959) I see Pycnostylus (Fletcheria) listed as a Tabulate! (Subclass Schizocoralla) (Whitleaves 1884) Fossilworks lists subclass Rugosa fosillid shows the following: Hill, 1981. Rugosa and Tabulata Ivanovskiy, 1965. Fossil Rugosa Wow! What a way to confuse a newbie! My specimens I found match the illustrations and descriptions in Index Fossils, I am happy to say. It must be the German in me, but I go nuts for accurate taxonomy (when I can get it). How can this change? How can it be BOTH rugosa and tabulata? Can it? I know some things change with further research.... but THIS should be fairly elementary!!??!! I know the index is older... but I would not think THIS would change much up to today! Species, yes. Even genus, perhaps. But subclass? Sorry if I'm a bit confused! Hoping someone can shed some light on this! David Ruckser
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