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Showing results for tags 'silurian'.
Found 212 results
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a recognized classic Indispensable! Worsley,Aarhus et al:The Silurian Succession of the Oslo Region NGU Bull.384,1983 ABOuT 7,5 MB NB: NO fossils are figured,the emphasis is on local correlation and stratigraphy
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From the album Invertebrates and plants(& misc.)
Eurypturus lacustris arthropoda chelicerata bertie Gr. Williamsville (A) Fm Buffalo, Western New York silurian -
Hello, everybody! I have been sorting through my wenlock limestone material, Middle Silurian and have a couple of personal problematica. I am wondering if any of you brilliant folks could help me out. Here is an object which seems to be an epibiont on a Favosites coral. 5 mm long and about 1.5 mm diameter at the widest. Is it a cornulitid ? Or a single corallite of Aulopora? Something else, maybe? And another one? On a solitary rugose coral. 3 mm x 1 mm. And an example of Aulopora from Wiki to compare : And a cornulitid that looks a bit similar : I would be very grateful for any help. Then there is this. Is it the worm Keilorites? Length 1.9 cm, width 2.5 mm max.
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- hobbs quarry
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Baltoeurypterus tetragonophtalmus (Fischer, 1839)
oilshale posted a gallery image in Members Gallery
From the album Invertebrates
Baltoeurypterus tetragonophthalmus (Fischer 1839) Silurian Smotrych River Kamianets-Podilskyi Ukraine -
I've been finding some very large calymenid cephala from my usual Liston Creek limestone spot. Today, i found the biggest one I've ever seen. Ive also noticed the rostrum is elongated in many of the ones ive found lately. They look quite a bit different from the calymenids I usually find at this spot. I need some help with the ID since I havent seen any like this before.
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There have been some great reports in the last week of folks hunting the Silurian and I wanted to add a report for my own serendipitous mini-trip from the last weekend. A few months ago, I had noticed a large pile of buff-colored stone dumped next to a retention pond in front of a local retail district. I thought they looked very similar to the Silurian dolomite I have seen and collected from elsewhere in Illinois, so I have been meaning to take a closer look. Last weekend I finally had some errands to run at Target with some free time on my hands, so I wandered over to the pile to check it out. In less than a minute I spotted a friendly face poking out of the corner of one piece of stone- Gravicalymene celebra! An iconic trilobite, and the biggest one I have found, with a cephalon just over 1 inch wide. It looks like it may be complete, although prep can be very difficult as @aek mentioned recently- at a minimum the cephalon appears to all be there. I looked around a little more and found a very poorly preserved cephalopod impression as well as one other rock with some intriguing shapes in it- it will need more prep though to say if it is anything. Since these were dumped next to a parking lot and there are no Silurian dolomite quarries within 60 miles, I can't say for sure what the source is. It seems likely to be the Racine or Joliet Dolomite of northeastern Illinois, though. I will definitely be returning when I have some free time and looking around some more- who knows, they may have used the same stone in other spots around the development!
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Recently I've been revisiting some local Silurian outcrops. I have a love/hate relationship with these outcrops as they are incredibly difficult to work with, however I secretly enjoy that aspect as well. The fossils represent the Homerian stage just before the Mulde Event, so roughly 422 - 426mya (if I'm not mistaken). For whatever reason, in the Racine formation, Gravicalymene celebra are almost always complete in the molting position and other species usually found disarticulated. The trick is extracting them without destroying them. Sometimes they are found enrolled, though much less common. I have only found two enrolled from this location over the past few years. 1) enrolled Calymene 2) Gravicalymene celebra 3) " 4) " 5) " 6) Sphaerexochus romingeri 7) Pentamerid brachiopod 8) favosites blastoid? 9) Dalmanitid pygidium 10) partial Dalmanites cephalon Close up snaps Sphaerexochus romingeri I believe this is a crinoid cup judging by the shape, but not sure. If anyone has any ideas... and the drum roll... Three species on one plate, Encrinurus pygidium, Dalmanites cephalon and a Calymene on the bottom . Unfortunately, due to the nature of the rock and my lowly prep skills, the only survivor is the Dalmanites. I somehow managed to restore both eyes with the original pieces for a nice "eye-popping" specimen. Thanks for looking . Also, in case you're curious, this entire collection is the result of four trips, not one. About 4-5hours per trip , so about 18-20 hours of collecting. and many more prepping. Cheers
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Hi everybody. Recently a friend gave me silurian fossils, but not identified, and I'm not sure about the species. What do you think? Regards Juan
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Sooo about a month ago I bought this trilobite for $2 with free shipping from China, it just arrived and I'm hoping to get an ID or even if is real. Seller gives no info other than that is supposedly from the Silurian period and is also supposedly a coronocephalus part. It appears as if there is more than one individual. Can get more pics looks like two separate ones maaaaybe a piece of one here? Thanks
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Anyone want to trade for some Desmogratus micronematodes (Graptolites)
DevonianDigger posted a topic in Member Fossil Trades Bulletin Board
I have a few decent-sized chunks of Desmogratus micronematodes, silurian graptolites from the Rochester shale. They're not super easy to come by, so I figured I would offer to share the wealth. Due to it being summer and me not presently receiving my teaching salary, I have to limit my trades to the US for the next two months, unless someone wants to pay for int'l shipping. Willing to entertain just about any offer, but will give preference to other uncommon material. Photo is an example, I have many pieces large and small. I can take photos of individual pieces based on potential trades!- 1 reply
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I went again to Lang's Quarry for the day to look for Eurypterids and associated fauna and had a very successful day with Mr Lang.
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I found the fossil below along the banks of the Muskegon River in Big Rapids, Michigan. All the pictures are different angles of the same fossil. I am hoping someone can identify it. The rock is about 2 inches in length (50 mm). I mostly find things from the Paleozoic era. Thanks in advance.
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I stopped at a new spot - Mifflintown Formation [Silurian], I didn't pick up much but one that came home with me had this in it. It is the 1st Trilo that I have found in Blair county, though they are reported in the literature in several places. Is there enough here to make any further ID? it is tiny!
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I've wanted one of these Moroccan crinoid blocks for ages, so I couldn't turn this one down when I was able to get it for £10 ($13 US). All I had to go on were some poor quality images and I had no idea how big it was. (it's 10 inches across at the widest point). However, because I've never handled one of these before, or seen one in the flesh, I don't really know what to look for in terms of fakery, compositing or restoring. It does have a really horrible surface, making it look like plastic - I'm hoping this is just some sort of thick, ugly substance that has been applied to consolidate the surface, since it doesn't appear to be a cast. I'd be grateful for any opinions, or suggestions of what to look for. Sorry the photos aren't ideal - I tried it outdoors in natural light, and indoors with flash, but the horrible surface made it difficult to photograph well.
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Retiolitid graptolite, Pseudoplegmatograptus, Llandovery, Poland
TqB posted a topic in Member Collections
I was browsing some photos of monograptids for sale and noticed in the corner of one of them a ghostly patch with some faintly marked bristles . Thinking it was probably a retiolitid , I bought it and it arrived yesterday. So it turned out to be which was pleasing as they're very interesting and beautiful and I haven't found any in the field yet. After wading through a fair bit of literature, I think it's probably Pseudoplegmatograptus obesus (Lapworth 1877), or something close (graptolites being frustratingly impossible to ID for non-specialists). (Mrs. @Spongy Joe ?) From Zdanow, Bardzkie Mountains, Poland. Sold as Wenlockian but I believe that should probably be Telychian (Upper Llandovery). Really tricky to photograph, the light has to be just right or it's near invisible, as in the first photo... The next three are taken with near overhead light and some digital tweaking. Scale bar is 1cm.- 14 replies
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Due to the current instability of the cliffs, I headed west Sunday. @EMP helped me out with a ton of info, so I knew I could hit a few sites in one day. My dad and I drove to Allegany County and got to Hunting. I messed up the directions so probably didn’t get to the exact site, but I found a few exposures of mid-late Silurian material, probably McKenzie and Tonoloway formations mostly. The yield was a huge amount of ostracods, some brachiopods. My dad saw a strange rock so I climbed some talus and picked it up. Upon closer examination it had not only ostracods, but tentaculitids on it! Think that will be my IFOTM entry. My dad also found a beautiful calcite vug at one of the sites. I saw a bryozoan in one rock but I didn’t pick it up as the rock was too big. No trilobites, but for a few short stops not bad. I encountered some oriskany sandstone near as well, but as those who have hunted in it will know, it’s badly metamorphosed and almost never yields trilobites. After that, I continued to the conemaugh FM, a Carboniferous terrestrial unit. There was a water filled ditch right in front of the outcrop so I had to do some ninja moves over it here and there. The sandstone was mostly barren aside from a few fragments and the shake was too fragile to survive long but nonetheless I made it out with a few nice plant pieces. A day well spent, I returned home, fossils and a few good memories in tow. I haven’t taken many pictures yet, but I will. Here are a few to whet your appetite. Vug and worn ostracods and brachiopods from Tonoloway limestone
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Hello friends and TFF family! Another little palaeozoic problem. This was given to me back in the mid 1980s and was said to be from the Pentamerus Grits of Newlands, Girvan, Ayrshire, Scotland. Brrrrrrrr!!!!!! I have it marked down only as "Cystoid?" and it may well be. The hexagonal patterned bit down the edge of the rock including the smooth shell like piece is 2.2 cm long. Bad picture. Here is a better close up. You can kind of see above that the hexagons are lying on the surface of the smooth bit, which i once thought was a bit of Pentamerus oblongatus but now think it may be some sort of inner layer of the fossil to which the hexagons are attached. Clearer below : Any ideas would be most welcome! @piranha @TqB
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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 found these two trilobites in an old collection and need some help. They are both labeled as Silurian from Glenridge Quarry at St Catharines, Ontario. They are listed as Gasport Formation. Before anyone gets too upset, they were collected pre 1991 as that is the date it was cataloged. So when these were collected, the site was either an active quarry or a garbage dump and not the park it is today. The first trilobite is obviously a Calymene. If anyone knows the species that would be appreciated. The second trilobite is what has be stumped. No clue as to what it is. It is just labeled as unknown with the locality information. Any clue out there??? Joe
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Hi, I went to St Paul, Indiana a couple weeks ago and was wondering what these two parts are? One is two inches across, the other is about an inch across. Trilobite parts? If so, what species? Thanks for any help.
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This past Saturday I was finally able to join ESCONI on one of their quarry field trips, this time to the Vulcan Manteno Quarry in Kankakee County, Illinois. After a relatively quick jaunt up I-57, I arrived at the quarry along with about 20 other enthusiasts, all clad in hard hats and neon safety vests. It is still an active quarry, although no mining was happening on that day, so the manager went over the rules with everyone- no climbing the rock piles, no getting too close to the high wall or the edge of the pit. Then we car-pooled down to the bottom of the quarry. The quarry exposes the Silurian Racine Dolomite Formation, and pile after pile of grey to orange colored rock was arranged on the quarry floor. It was hard to know where to start, so everyone wandered off to poke around and see what they could find. I didn't find much to begin, but after a little while I started noticing some interesting shapes, and within about an hour I had filled my bucket. I say "shapes", because I am not as familiar with this deposit as Mazon Creek, so my IDs for most of these only get as specific as "cephalopod" or "crinoid"- and in many cases more like "round organic-looking thing" . At the designated time everyone began heading back to the cars as a light drizzle came down- we only had about an hour and a half, but like I said, that was plenty of time to fill a 5 gallon bucket. It was an excellent trip, and I have to thank ESCONI and Vulcan for making it happen- I will definitely be signing up for the next one! My most interesting find is two associated partial impressions of echinoderms- the field trip leader suggested the one on the right was from Caryocrinites but he was not sure about the one on the left. I also found another small echinoderm piece, perhaps the base of a crinoid calyx?
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UPDATE: This specimen has been identified by Steve LoDuca as Thalassocystis striata, a non-calcareous Silurian macroalga. Interestingly, the type specimen was found in the same general locality as my specimen. I have a friend who works in a Silurian dolomite quarry in Mich. He sent me this pic this evening. I have not examined the rock in person yet. The pessimist in me says mineral deposits. The optimist in me says maybe fossil algae. It's a long shot considering dolomitized limestone... but it sure looks interesting... thoughts?
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Hey everyone! I have some tiny trilobite pieces that I found at Wren's Nest in Dudley, UK while on a hunt last year with @JohnBrewer. I was wondering if they are identifiable. The tiny single piece is 5mm long, and the piece on the small plate is 3mm long. Age is Silurian. Thanks!
