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Showing results for tags 'Silurian'.
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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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- sphaerirhynchia
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- atrypid
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- orthid
- schizotreta
- bryozoan
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- cystiphyllum
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- wenlock shale
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- eostrophodonta
- eostrophodonta mullochensis
- leptostophiidae
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From the album: Fossil Collection: DC Area and Beyond
Astraeospongia sp. Decatur County, TN Beech River Formation Silurian- 1 comment
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What happened to the website of William Hessin's "Fossils of South Central Ontario"
JUAN EMMANUEL posted a topic in General Fossil Discussion
Hi everyone, does anyone know what happened to William Hessin's publication "south central ontario fossils" or the website where one can purchase his publication either by book or cd? I wish to obtain a digital copy of his book and if anyone can provide me with a way to contact this guy that would be great. -
I went to the beach in Doctors Park in Fox Point, WI over the weekend to hopefully find some Silurian reef fossils. Most of the stuff I saw were poor-quality brachiopod fossils, but I these look kind of interesting. I think the first one might be some kind of a coral, but it does not match any coral fossil descriptions I found on online guides for the area. Yet, it looks more organic the usual porous rocks I on the beaches. I don’t know what it make of the smaller one: it seems to have more of a pattern than the typical rocks I find that look like a bunch of clams fell into a concrete mixer. But, again, it does not match anything else in the local guides. Also, if anyone knows, what kind of rocks typically bear fossils in this area and how to you go about opening them? I’ve only ever used the freeze and thaw method for concretions I found on Mazon Creek, IL, but the stones I find here are completely different.
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I'm thinking the outer edge of a shell, but my friend thinks brittlestar (Shropshire, Wenlock Edge)
EntomoloJosh posted a topic in Fossil ID
Hello, I went to Wenlock Edge in Shropshire a few days ago and collected some fossils. We're all confused as to what this one could be? It's around 5-6cm across. Thank you!- 5 replies
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I'm currently working on a simulation of extinct biomes, i'm slowly learning how to make everything as realistic as possible for realtime 3d simulation. I would like to start with plants recreated from some Silurian, lower devonian and upper devonian, and slowly working to recreating the biomes in the areas where they lived and later i'l like to add animals aswell. All my research is made with google i'm not a professional in archeology or 3d art, some of the models are very simple and unpolished for now and will be updated. The project is in the early stages for now but it runs very well on most pc's Here are ome of the plants that lived in the late devonian Tetraxylopteris and leaf detail Archeopteris and branch detail Calamophyton Protolepidodendropsis Uang (China) Weylandia rhenana Aneurophyton Wattieza Leclercqia
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Microbial, Trace, or Tectonic shock? Web pattern on Silurian sandstone
SteveE posted a topic in Fossil ID
EDIT... never mind I found it... "Kinneyia" and this was the paper. Thanks Folks! original post below.... Blair County, Pennsylvania, USA Hi folks, long time no see. I think the sandstone is from the top of the Keefer subunit at the top of the Clinton Group. Under someone else's post a few years ago, I recall someone giving this pattern's name, and also a discussion whether current thinking is that it is microbial/algal or trace or records a seismic shock. I can't find any of that anymore, and I just can't remember.. Can any of you remind me what this pattern is called? Extra points if you might still have link(s) to papers mentioned in the earlier discussion. Thanks~ PS samples are different rocks, and are both from (or in) the float. The patterned surface is the bedding plane- 3 replies
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I have a partial trilobite cephalon that I collected from the Waldron Shale spoils piles at Falls of the Ohio State Park. Since it is not directly from the quarry wall, there is some uncertainty in the stratigraphy, but it is likely Waldron or the overlying Louisville Ls. both of which are right near the border between Lower and Upper Silurian. Hopefully there is enough here to give a shot at an ID. The best I can do is say it could be Metopolichas breviceps but there appear to be some differences. Hopefully someone like @Kane or @piranha or @Ken K can see enough here to have an opinion. If not, "Trilobite Head" it will be called. Thanks for any help. Here it is enhanced a bit hopefully so you can see it better. You can see by the scale that it is under 1 cm wide. My stab at an ID initially came from Halls 1879 publication on the Waldron. Below I have my specimen between the figure out of Hall (on the right) and an example of one from the American Museum of Natural History website (left). The AMNH site says this specimen is the only known complete example which just adds to my doubt on the ID, but I have not found a more common, better match. And lastly, here is a zoom in of the cephalon to hopefully show the small bumps covering it. Thanks again for any help.
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Hello to all. The Acastella trilobite from my own collection. Well preserved. I tried to get close-ups of the eyes and some small details. Place of discovery: outskirts of the city of Kamenets-Podolsky, Khmelnitsky region of Ukraine. It was not possible to determine the exact age (Silurian or Devonian). Have a nice day 1.mp4 3.mp4 4.mp4
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I collected some trilobites last year that I have now sent out for preparation. Most of the specimens I found were by splitting rock, resulting in some nice lengthwise cross sections but I also did find one ventral and one dorsal example as well. I wanted to make a post here so I can share the before and after results. Will update this as time goes on, and pieces are finished. #1 ventral #2 dorsal Did a small amount of cleaning on #2. Will let a professional do the rest of the bulk cleaning. #3 I gifted this specimen to a gifted preparator. It looks to be a complete, but small Calymenid. #4 the largest Calymenid I split out. This should be a nice complete specimen. #5 has 2 complete Calymenids, in three pieces of stone. The second specimen cannot be seen, but is underneath the split rock in the first image below. I suspect this one will be a tricky and difficult prep job if both are to be cleaned and seen. #6 this Calymenid is small, complete, and somewhat enrolled. #7 the specimen I am most excited about. This doesn't match the Calymenid cross sections shown above. Perhaps a Dalmanatid? I dont think a complete one has been collected here yet, so chances are pretty slim. That's all I've sent out for now. Many of these sections are very difficult to see without certain lighting and wetting, but I tried my best to showcase what I've been looking for in the rock. I look forward to sharing the results with all of you soon!
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QUARTETnary - A card game about the geological time scale
paleoflor posted a topic in Members' News & Diversions
L.S., Wanted to raise some awareness on TFF because I expect many here will simply love this: A good friend of mine, Iris van Zelst (geophysicist at the German Aerospace Center in Berlin) has developed this really nice card game centred around the geological time scale: QUARTETnary The gameplay is based on the classic game Quartets (similar to Go Fish and Happy Families), where players try to collect as many sets of four cards as they can. In QUARTETnary, each of the sets represents four major events that took place during a specific geological time period. To win the game, you need to create the most complete timeline of Earth history, all the way from its formation 4.567 billion years ago to the appearance of us humans. The cards have been designed by Lucia Perez-Diaz (Earth scientist and freelance illustrator from the UK). The illustrations look amazing and I really like that they adhered to the official colour scheme of the International Commission on Stratigraphy. Iris sent me this nice set of cards for the Proterozoic: The game includes 15 sets of four cards in total (many featuring fossils): one each for the Hadean, Archean and Proterozoic eons, and one each for the 12 periods of the Phanerozoic. I expect QUARTETnary will become a really fun way to learn about and memorize the different geological units and major events in Earth history. Kind regards, Tim -
September found me exploring a rock formation I had never encountered before, the Waldron Shale of Indiana. It was impressive, offering up many gems (fossils). This post is picture heavy but stay with me!!!!!! First up is a typical hash plate. I am usually attracted to hash plates but discovered only one came home with me. Next time It will be a priority to collect more! Next up are the brachiopods of the Waldron, many of which were identified by the help of Adam's Silurian post. He will likely have some corrections for me, which I will welcome! Most specimens contained a mineral crust that took some effort to remove. The results were worth the effort. The next brachiopod I labeled Homoeospira, but these were definitely wider than the ones above. Notice the two ribs in the sulcus on the next brachiopods: Only 1 rib in the sulcus on these: Atrypa was the most frequently found larger brachiopod: My guess is that these are some form of Stegerhynchus but are much smaller and very thin: Rugosa coral was an uncommon find for me. Favosites, on the other hand, were found frequently: This tiny favosite grew around a crinoid stem: As for Bryozoa, I picture this unique one. It grows around a piece of algae. The algae dies, leaving the bryozoan standing hollow! This is the only species of sponge found: Initially, my thoughts were that the next specimens were TINY horn coral. But after seeing specimens of Cornulites from the Waldron on line, my thoughts changed. I welcome opinions on this! While collecting, I did not know a cephalopod ended up in my bucket. It was tucked in some matrix saved for another fossil, only to be discovered when I broke apart the rock at home!! This happens to me quite often and is why my tendencies are to save the whole piece of matrix a fossil is in until I prep it at home. Surprises then can happen. The species of ceph eludes me as it does not match the ones mentioned existing in the Waldron Shale. Trilobites seem to be commonly found in the Waldron, so I was a bit disappointed not coming home with a complete bug. Next time!!!! For some reason, I found 4 loose eyes of Glyptambon and almost left them behind. But after they were cleaned, I am glad to have kept them. Platystoma are common gastropods found. If you look closely, the flat spirals are P niagarense and the raised spirals are P plebelum: This next gastropods, Strophostylus cyclostomus, are very tiny (4mm) and ornate. My favorite: P:yrite seemed to grow on all of the fossils and needed to be removed. But once in awhile, some beautiful crystals would show up! And in addition, an occasional geodized brachiopod would be found: I will finish this post in a few minutes!!!!!!!!!!!!!!! Crinoids left to come.
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Embedded in a shell bed - what is it? From Mortimer Forest (Silurian; Ludlow), Shropshire UK
EntomoloJosh posted a topic in Fossil ID
Hello, I noticed this (referring to the long darker line with the circles in it) in one of the shell beds that I collected from Mortimer Forest a couple weeks ago. It doesn't really look like a shell, or part of, to me, so I'm very confused as to what it is. Thank you!- 1 reply
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I am getting ready to leave for a fossilhunt this morning. I am heading to the Rochester Shale, to dig up some Silurian treasures. Currently waiting on a friend to get here and then we will make our journey. I am very excited to get out today. I will post a report when I get back!
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Lots of fossils from Mortimer Forest, Shropshire, UK (Silurian; Wenlock)
EntomoloJosh posted a topic in Fossil ID
Hello, For a trip for my birthday, my girlfriend and I went to Mortimer Forest in South Shropshire to look for fossils, and we came across quite a few, and as I am very new to fossil collecting (only have been interested within the past few weeks, and I got the DK Fossil Handbook earlier today), I'm not entirely sure what most of them are. I've made a link to an Imgur album for all of the fossils we collected. The caption for each photo is my best guess at an ID, and the numbers denote which rocks they are in. Most of the fossils were found in/by streams, although some were found on the ground by some exposed bedrock. Thank you for reading, and I hope you can help https://imgur.com/a/sT1T0bg -
Hello, I recently collected a stromatoporoid fossil from Mortimer Forest in Shropshire, UK. I've since bought some general ID guides to help me with my other fossils, and in the one I'm currently using (Atlas of Invertebrate Macrofossils by John F. Murray) all of the stromatoporoid photos look to be thin sections under a microscope. I've also found a couple sources online that say stromatoporoids are identified using thin slices under a microscope. Unfortunately I don't have access to a high-powered microscope nor equipment/knowledge to produce those thin slices, and so my question is can my ID be taken further than stromatoporoid? I have a x15 hand lens but that is of course nowhere near a microscope. I think by using the general order descriptions in the Atlas I could try, but I'm not sure... Thank you
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Looks like a plant, but I'm not sure (Mortimer Forest, Shropshire. Silurian; Wenlock)
EntomoloJosh posted a topic in Fossil ID
Is this some kind of plant fossil, or just a weird-ish rock? It was about 15mm in length. Original photo: Brightened photo: Thank you!- 10 replies
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From the album: Fossil Collection: DC Area and Beyond
Crinoidea Romney, WV Tonoloway Formation and Helderberg Group Late Silurian/Early Devonian -
Found this specimen in Pike County, PA. Here are some photos from different angles! This fossil has taken me in all different directions with regards to research. I have been unable to discern what this find may be. If anyone has an idea, I’d love to hear it! (My guess) Lepidodendron or Archaeopteris sapling branch??
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Some unidentified spicules from the middle Silurian Racine formation. All specimens measure approximately 250 - 500um.
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From the album: Oklahoma Paleozoic Fossil Finds
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I apologize, I am not used to dealing with dolostone of this hardness. The rock of the Niagara Escarpment is serious stuff! What type of equipment besides cold chisels, dental tools and hydrochloric acid should I consider purchasing?
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From the album: Fossildude's Purchased/Gift Fossils
Calymene celebra Silurian, Niagara Limestone Grafton Illinois.© 2021 Tim Jones
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I am wanting to tackle extracting whatever this dark fossil is. But I’ve done very little fossil preparation (other than dissolving stuff with HFl but that’s a story for another day). This is from the Racine Formation from Quarry Park and I picked up a bunch of other pieces to work on for practice. I’m not used to handling dolostone. I grew up with the Mississippian of Indiana, specifically Bloomington-Bedford area. Any suggestions welcome.
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