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Showing results for tags 'middle ordovician'.
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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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From the album: Fossil Collection: DC Area and Beyond
Didymograptus murchisoni Abereiddy Bay, Wales, United Kingdom Bifidus Beds Middle Ordovician-
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From the album: Fossil Collection: DC Area and Beyond
Trinucleidae Shropshire, United Kingdom Hope Shale Middle Ordovician-
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Rock Specimen 2-1/2" x 3" Middle Ordovician, Watertown, NY. Black River Group?? Would appreciate ID as specific as possible and any other information you can provide. Thanks.
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- black river group? limestone
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Canada/Ontario/Ordovician/Middle Ordovician
MarcusFossils posted a gallery image in Member Collections
From the album: My Collection
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Canada/Quebec/Ordovician/Middle Ordovician
MarcusFossils posted a gallery image in Member Collections
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Canada/Quebec/Ordovician/Middle Ordovician
MarcusFossils posted a gallery image in Member Collections
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MarcusFossils posted a gallery image in Member Collections
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I wonder if this fossile in a shale is a graptolite or a nautiloid. The length is about 3cm, age middle ordovician, in the Elnes formation. The place has many graptolites. Pict. 1 Pict. 2 I also found this 1,5 cm long specimen, which seems to be a nautiloid?
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Last summer I visited Helgøya, a place north in the Oslo-field, and found this rock at a site I believe is middle or late ordovician. No other well preserved fossils was possible to find at the site. It is very fragile, so didn't break up the whole rock, but some parts fell of which have clear patterns. It seems the whole rock have some kind of bullet forms inside. Anyone have an idea which kind of animal it is? Pic.1 Pic. 1 Pict. 2: Pic.3 Pic. 4 Pic. 5 Pic. 6: Pic. 7:
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Bug du jour - Please help me identify my trilobite, One-eyed Jaques
GeschWhat posted a topic in Fossil ID
I purchased this beautiful pile of poo pellets, and the matrix contained this little hitchhiker. Since I know next to nothing about trilobites, I was hoping for an assist. He dates from the Middle Ordivician (Llandeilian), and was found in the Traveusot Group (Angers), in La Meignanne, Maine-et-Loire, France. I don't know if the second photo is more of Jaques or just another trilo-bit. Thanks for indulging me. Yeah, I'm digressing..... -
From the album: Middle Ordovician Trenton Group in New York
2 cephalons: Flexicalymene senaria Unidentified Cheirurid Middle Ordovician Trenton Group Jefferson County, NY Collected 11/09/2020© Owen Yonkin 2021
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Hello everyone! So a while ago I collected a couple of rocks while fishing up near Plattsburgh, NY. These rocks were from the Ordovician Trenton Group and contained a variety of organisms including inarticulate brachiopods and corals. More importantly though, were the variety of trilobites. In one of the rocks I found pieces of Isotelus, Cryptolithus, and Ceraurus. I was looking at a small piece of that rock yesterday when I noticed a strange little fossil. It was a tiny, spiny free cheek of a trilobite! It looks very similar to Meadowtownella trentonensis although it could be a different species. I do apologize if the pics aren’t great but the fossil is so small that I had to use my microscope to see any detail lol. Also, how do I get my images to be not turned sideways? Thanks for looking! Owen
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- middle ordovician
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Paleozoic Fossil Hunting in South Korea (Especially Trilobite)
Joon posted a topic in Fossil Hunting Trips
Hi guys, This is my 1st post(Execpt introduction)! I went to fossil hunting at June 5th and 6th to Gangwon-Do, Republic of Korea(South Korea). It was my 2nd geological exploration. Location information : 1st site - Jangseong, Gangwon-Do, Republic of Korea(South Korea) = Jiggunsan Formation(Jigun Mountain Formation), Middle Ordovician <Figure 2> 2nd site - Sesong, Yeongwol-Gun, Republic of Korea(South Korea) = Jiggunsan Formation(Jigun Mountain Formation), Middle Ordovician <Figure 3, 4, 5> I rode a bike to get there about 110 km(Actually 50 km. Including returning distance is 110 km.) and there was a lot of bugs like flies or mosquitos etc. It was very hard journey but it was very nice too. This picture took at the first fossil site.(Actually, before arrive at the fossil site.) The first fossil site was easier to access than the second fossil site. \ Actually, I couldn't find the second fossil site. I heard that veeeeery many fossils are there(Trilobites, Cephalopods, Gastropods, etc.). However, it was too hard to get there. Forest was too thick to access! So, I couldn't find the actual fossil site, but I found a pile of black shale. Probably it exposed the tip of the formation or crumbled and moved from the site. Anyway, I didn't have much time at that time to investigate arround there. I hope to go there again in order to investigate someday! I collected 88 specimens there.(Except donation. I donated about 27 specimens to national museum.) I could find a lot of trilobites and gastopods. I couldn't find a complete one, but I found sub-complete trilobites and its eye lens are completely preserved. Also, I found complete ventral cephalon of trilobite. Its hypostome is very good conditon. I found this one at the 1st fossil site. And, I found a lot of trilobite hypostome at the 2nd fossil site too. Left side - Excavated at 2nd fossil site Middle side - Excavated at 1st fossil site Right side - Excavated at other fossil site. It's plant fossil. I found them in a pile of coal muck. It's Gangwon-Do too. * I'll update fossil images after this post. I resized whole, but I think that the data is not enough to upload whole images here.- 36 replies
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Can please someone help me? I found this fossil from an middle ordovician place. Could it be a horncoral or a foram with a spiralform? The specimen is about 2 cm in diameter, some parts hidden in the stone. Any help very appreciated.
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It was a beautiful 53 degree day today and I decided to take a 155 mile round trip to Oregon, Illinois. The purpose of the trip was to collect a road cut that exposes the Middle Ordovician, Platteville Group / Miffin member fossils. @connorp was nice enough to give me the location to this 1/2 mile collection site in Ogle County. I had fun checking out this area, but it will probably be my own time visiting this site and not for any particular reason. There is plenty places to park along the road, but this area can be tricky for people who are not sure-footed and children, as the scree on the hillside can move easily, there is also a deep drainage hole located towards the middle of the collecting area and some of the cliff face is unstable. SCREE- Drainage Hole- Unstable Walls- Here are some other pictures of the area. Fossils to follow in next post-
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Good morning everyone, Few weeks ago I found this interesting imprint in limestone erratic boulder, it was found in Klaipeda district Western Lithuania. The fossil is 2 cm length, I would think it belongs to worm or maybe sea cucumber. Any idea? Best Regards Domas
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I found this several years ago in Kentucky near Maysville, which, based on this map, is in the middle to upper ordovician. It was probably around 50 feet down. All I have is the tail. Probably not enough to identify, but any information would be appreciated. I couldn't find a measuring device, but I will post a picture with one as soon as I do. It is about 8 1/2 inches long, or 26 1/2 centimeters. Map is upside down. I have the fossil on hand for any clarification/questions.
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- middle ordovician
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First off, I don't know anything about paleontology. I found this fossil in Nicholas county Kentucky. It was about at the C in NiCholas county on the map. Sorry it's upside down, but Nicholas is 2 above bracken, assuming picture orientation. The fossil was 6-10 feet down. The first layer of fossils went down about 5 feet, maybe more, and we're tan and sandy. Below this layer was a gray layer, and this was several feet into that. Also, don't have enough file space to do enough pictures for inches, but it is about 11.5 centimeters long, or 4.53 inches.
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Hello everyone! I've been examining a fossil I found a short while back and wanted to try and confirm my suspicions that it is a Orthoconic Nautiloid. Interested to hear some opinions from those more knowledgeable than I. So far I've been struggling to find good resources describing the different species found in this formation, it seems the work of John Laurie should possibly be my focus. The diameter of the possible siphuncle seems unusually large and positioned in very close proximity to the outer shell. I seem to remember reading something about the siphuncle moving closer to the outer shell as the nautiloid ages. The fossil was found in Maloney Creek, NT, Australia and comes from the Horn Valley Siltstone, early to middle Ordovician (487 Ma - 468 Ma). Feel free to ask for any additional photo angles, measurements or further information on the location. I also have a number of specimens from the same location that are clearly straight-shelled nautiloids, but likely another species.
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Rhynchonellids are hard to identify by exterior morphology as they often need to have their internal structures visible to be sure of an id. However if you know the faunal lists from a specific area, you can reduce the candidates considerably. The specimen here has 22 costae with 4 on the fold and thus, at this size must be one of two species, Rostricellula minnesotensis or Rhynchotrema wisconsinensis. The only completely safe way to differentiate between the two is the presence or absence of a cardinal process in the brachial valve but this is not possible here. However, Rostricellula usually, though not always, devoid of shell ornamentation, such as ridges or the presence of growth lines, and Rhynchotrema wisconsinensis usually, though not always, shows these, though they can also be seemingly absent through wear. But, R. wisconsinensis never shows a length to width ratio of 1.00, only from 0.80 to 0.95 and this specimen has a ratio of 1.00 which does occur in Rostricellula. Furthermore, the fold of Rostricellula is wider and less sharply developed Finally, good specimens of Rostricellula are far more common than R wisconsinense at the locality as the species most commonly found here is Rhynchotrema ainsiei which is describe elsewhere and not to be confused with the other two due to it's larger number of costae Thus, I am fairly confident with my id
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- brachiopod
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- hermitage formation
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Hi TTF! Since I am now going to present my science fair at the Ontario regionals, I have decided to add a few new displays to it. Right now, I am working on a model of the Earth during the middle Ordovician, when Pseudogygites Lantimarginatus lived. I have searched the internet for pictures of the middle Ordovician Earth, but each one is slightly different. For example, the location a Siberia changes with almost every map. I assume this is just because the different maps were made during different eras or by different people. Does anyone on the forum know which is the most up to date image? There are some images of the globe as it is right now below.
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As with the adult this has more costae than any other brachiopod found in this formation. In this case 32. and 5 of them on the fold. The fold and sulcus are not yet very noticeable, as this species only develops a noticeable fold as it matures.
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From the album: MY FOSSIL Collection - Dpaul7
Orthocera Specimens 11" x 18" Morocco Data: Orthoceras ("straight horn") is a genus of extinct nautiloid cephalopod endemic to Middle Ordovician-aged marine limestones of the Baltic States and Sweden. This genus is sometimes called Orthoceratites. Note it is sometimes misspelled as Orthocera, Orthocerus or Orthoceros (Sweet 1964:K222). Orthoceras was formerly thought to have had a worldwide distribution due to the genus' use as a wastebasket taxon for numerous species of conical-shelled nautiloids throughout the Paleozoic and Triassic. Now, Orthoceras sensu stricto refers to O. regulare, of Ordovician-aged Baltic Sea limestones of Sweden and neighboring areas. These are slender, elongate shells with the middle of the body chamber transversely constricted, and a subcentral orthochoanitic siphuncle. The surface is ornamented by a network of fine lirae (Sweet 1964:K224). Many other very similar species are included under the genus Michelinoceras. Orthoceras and related orthoconic nautiloid cephalopods are often confused with the superficially similar Baculites and related Cretaceous orthoconic ammonoids. Both are long and tubular in form, and both are common items for sale in rock shops (often under each other's names). Both lineages evidently evolved the tubular form independently of one another, and at different times in earth history. Orthoceras lived much earlier (Middle Ordovician) than Baculites (Late Cretaceous). The two types of fossils can be distinguished by many features, most obvious among which is the suture line: simple in Orthoceras, intricately foliated in Baculites and related forms. TIME PERIOD: Middle Ordovician (458-470 Million Years Ago) Kingdom: Animalia Phylum: Mollusca Class: Cephalopoda Order: †Orthocerida Family: †Orthoceratidae Genus: †Orthoceras- 2 comments
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