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Showing results for tags 'ordovician'.
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Found a few beautiful pieces in rocks dug up by the local water department.surface exposure is Gasconade dolomite so i assume these are actually late Cambrian. But im not sure how deep in the ground they came from. Either way. I love these rocks and thought I'd share them with you. A lot of the pictures are different angles of the same rock. But theres a few of a second rock. I think i found and cleaned 4 rocks. Just didnt get pictures of all of them. Hope you enjoy. Happy hunting.
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From the album: Invertebrates
Mitrocystites mitra BARRANDE, 1887 Ordovizian Sarka Formation Rokycany Czech Republic -
Hi All, I picked up this rock in my back yard a couple of days ago. I picked it up because I saw a couple cross sections of rugose coral and some fenestrate bryozoan fossil pieces. When looking at it later, I noticed this feature. I haven't found anything like this before. Is this just a different type of bryozoa? These little marks also look like some tiny Platycrinite crinoid pieces. This was found in Howell County, Missouri, USA. It came from the Ordovician Period. These lines measure approximately 23mm in length and measure approximately 0.79mm wide. The individual spots are oval in shape and measure approximately 0.38x0.79mm. I don't know if it shows well in the first image, but this feature appears to be in a fracture in the host rock. There is still some rock covering the feature in the fracture. Any assistance or direction that you can give me is greatly appreciated. Thanks for your time, Doug
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Does anyone have experience with the Middle Ordovician brachiopod faunas of the upper Mississippi Valley? I came across this odd fragment in rocks from a quarry in south-central Wisconsin. To my knowledge they are known in North America only from the Appalachian Basin (Tennessee, Virginia, West Virginia, Pennsylvania, Quebec, Newfoundland), not the interior basins like the Illinois basin. Has anybody else seen this critter or similar in the Platteville? As far as I am aware, the only species documented from the Platteville that looks anything like this is Megamyonia unicostata, but that has a single costa rather than the several apparent here and in the types of Ptychoglyptus. Platteville Fm, probably in P. undatus biozone = Upper Ordovician, Sandbian stage (old North American Turinian Stage)
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- brachiopod
- illinois
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Here are two Edrioasteroids from the Verulam Fm. (Ordovician) near Brechin, Ontario, Canada. The first one might be Isorophusella? (specimen is 1 cm in diameter). The second one may not have enough present for ID: @crinus
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As fall has finished dropping leaves and caused Poison Ivy and most insects to go dormant, I have been exploring some prospects in the Paleozoic of Central Pennsylvania. On one trip back to help my folks get a Christmas tree, I had time to spend and hour or so at an abandoned quarry that exposed Ordovician aged rock. Unlike the exposures of Ordovician rock in the Cincinnati/Louisville region of the US, or southern Ontario, or the Minnesota/Iowa area, Central PA is not know for heaps of fossiliferous limestone or shale. One has to do a little research to find what formations have fossils, and then try and find an exposure that you can prospect. I found one such quarry from an old guidebook out in Cumberland County, PA. It has exposures of the Chambersburg formation which is known to have fossils and is also known to have a bed of rock that contains an unusual Echinoderm called "Nidulites". My goal was to verify if fossils were present at the site and then try to locate the "Nidulites" bed. View of the quarry wall. The rock was tilted NE in one direction (away from the camera) and N in another direction (to the left of the photo). I started at the south end of the quarry (right side of pic above) and started to look through the fallen scree and exposed rock layers. Not finding anything I moved north along the walls of the pit until I started to find some hints of fossils in the rocks. Mostly cross sections in massive limestone, but at least there were fossils there. This is what it looked like along the walls and in the talus along their base. There were multiple pieces of limestone with Calcite crystals, both massive and crystalline, in some areas as the veins filled in cracks within the rock ages ago . I found one piece that had a couple of small Fluorite cubes on it, a rare find in the field! I finally started to find some fossils in the talus concentrated in one area but could not figure out the layer they came from. Preservation was ok but as they came from fractured massive rock, completeness was not the best. Here are my finds: Leptanea sp. Brachiopod Sowerbyella sp. Brachiopod Possibly part of an Isolteus sp. genal spine Unknowns So not too bad for a couple of hours of looking. I'll have to visit the quarry again in the future and see if I can find more in the talus and maybe trace the bed that the better fossils come from. No "Nidulites" either, but I am not discouraged. I confirmed that fossils can be found here, I just need to do some more looking.
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I didn't take part in the Secret Santa this year but it almost feels like I did, as I received a package from @Nimravis the other day (not a surprise, I knew it was coming, but the timing was right for Christmas) - Edrio's from the Bobcaygen formation. Thanks again Ralph! I could us a bit of help with IDs. I guess they could use a bit of prepping to make them easier to see, but maybe someone can recognize them the way they are. I figure #3 is Belochthus orthokalus, and #4 is Cryptogoleus chapmani, but not sure of the other two. Is #1 a smaller Belochthus? It looks like there are two there but the 2nd one is even more buried so it may not be identifiable. And is #2 a larger Cryptogoleus, or something else? Also, what is the small discoidal bryozoan?
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Locally, graptolites are very common in the Maquoketa/ Ordovician rock. They present themselves as 2 dimensional creatures on certain bedding planes. Below the Maquoketa is our Galena. It has graptolites but uncommon. Again, they present themselves as 2 dimensional. The "unknown" specimen from the Galena, presented today, is obviously 3 dimensional and I venture a guess that it is a Graptolite. But I thought I would seek opinions in that I have seen thousands of local graptolites but never one that is 3 dimensional. Could it be something else??
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From the album: Invertebrates
'carpoid’ echinoderm Lagynocystis pyramidalis (BARRANDE, 1887) Ordovician Šárka Formation Rokycany Czech Republic -
Monday morning was dreary here in Central Kentucky. The sky was cloudy grey, and the rain was sputtering off and on. I didn't let that dampen my spirits though. I had planned to go fossil hunting and nothing was going to ruin my day! I grabbed my hunting gear, a cup of coffee, dropped my daughter off at daycare, and headed out. I arrived at the Upper Ordovician (Drakes Formation) spot that I had found this year. The last time I visited this place I didn't have time to really enjoy myself. It was more of a smash and grab. A rush to see if anything was actually there and to grab what I could. This time I was determined to spend more time at my new found hunting grounds. Not even a little wind and rain would stop me. After about a 45 minute drive I arrived at the road cut. The last time I visited, I looked through the scree at the base of the cut and found items that, over time, had washed down from the rain. Many of these pieces didn't fair well with the 5-6 meter drop. After a few minutes of looking at the strata of the cut, I determined that the most fossiliferous layers were at the top 2 meters or so. I decided that I needed to check out the top instead of the bottom. I'm glad I did! After a short walk and hike up the gentlest slope I could find, I made it to the top. This is what I found. A loose layer of dirt (well mud since it was raining...) with coral heads and fragments everywhere! All different shapes and sizes. whole specimens just a few cm across to ones that where half a meter or more.
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I found this while fossil hunting in a creek near Lake Ontario in NY. It is Ordovician in age and I believe it is from the Trenton group.
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I made a trip to my new favorite Upper Ordovician (Drakes Formation) spot today (working on a field trip report ). I came across a few of these cylinders, which I believe are orthoconic nautiloids. I found them in many different sizes. Some taper as I would expect from an orthocone. However, they do not have the suture lines or septa that I am used to seeing. Some have what appears to be a possible siphuncle in the center while others do not. Here are a few pics of some of the more interesting ones. I can provide more if needed. Thoughts? Thanks in advance for any assistance! This one is about 3cm in diameter and 7.5 cm length. Number 8 in first pic. There are also a couple that have this twisting pattern on the outside. This one is about 5cm in diameter and 3.5 in length. Number 4 in first pic. Possible Siphuncle? 1 cm in diameter. Number 7.
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- drakes formation
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I am considering buying this fossil offered online but it's NOT on our "favorite" auction site- just straightforward purchases. I really like this, and it's not QUITE up to what is not affordable for me. It is offered as an arthropod trackway in hyporelief.
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this trilobite from Shidian Yunnan, China; Ordovician period; 7cm；eyes and facial suture in pic 1; genal spine cannot see.
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For your viewing pleasure. Sharing with the group.
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Hello dear members, in this post I'll show you the fossil bonanza of Caesar Creek State Park, near Waynesville, Ohio. This summer I spent a day collecting fossils in Ohio and I visited three sites: Trammell (I talk about it here http://www.thefossilforum.com/index.php?/topic/98830-trammel-fossil-park-ohio/), Oakes Quarry and Caesar Creek State Parks. The latter was the best, both for finds and general experience. It is in fact regarded as the most accessible fossil hunting locality on Ohio: over 150 m (500 ft) of fossiliferous rocks are exposed, due to the works for the constuction of an emergency spillway back in 1978. Since then it has attracted the attention of paleontologist and amateurs. In order to collect, you have to sign an authorization at the nearby Visitor Center and you cannot use tools or collect specimens that are larger than the palm of your hand. Nevertheless, you'll find and be able to keep some exceptional material and I consider my experience as the best ever in a fossiliferous locality! Three formations crop out: Waynesville, Liberty and Whitewater formations. They date to the Upper Ordovician, a period when Ohio was covered by a shallow inland sea and was characterized by a tropical to subtropical climate. Beds of limestones and mudstones formed as the result of storm waves and currents; in a few cases the effects of super-hurricanes and tsunamis can be recorded. the fossil assemblage is dominated by clusters of brachiopods, bryozoans and horn corals. aragonitic fossils, such as bivalves, gastropods and nautiloids are preserved as internal molds. articulated and frequently enrolled trilobites can be found, as well as fragments of Isotelus, a very large trilobte and State Fossil of Ohio. In the Visitor Center a small diomara shows the Caesar Creek biota as it apparead in the Ordovician, alongside some fossils, including a perfectly-preserved Isotelus specimen. In the field, I collected fossils only from the ground, not on the walls (where you can only take pictures). i found a lot of isolated specimens, here I show the larger and more impressive clusters. Let's start with a picture of a section of the exposure And now the fossils! In the clusters, many kinds of fossils are preserved, in particular brachiopods and bryozoans, of which many species can be found. Horn corals are easily distinguishable: In this case, I think the cephalon of a trilobite can be seen: This was a huge Bryozoan cluster! And now, my favourite specimen, the genal spine of an Isotelus trilobite! Finally, a picture of me holding a rock densely-packed with bryozoans and brachiopods. all right, that's all! I hope you liked my post. I really loved the experience at Caesar Creek: everywhere you looked you could see museum-quality specimens. I spent only a couple hours at the site, but I have never seen so many fossils in a single place! I higly suggest anyone to pay visit, you wont't be disappointed. Thank you, Fabio
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Need help on the id of this early ordovician trilobite butt. South Central Missouri.
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Here are a few fossils I recently collected from the Maquoketa Group (Upper Ordovician) in northern Illinois that I'm not sure about. 1) Maybe some kind of trace fossil? 2) The two things in question here are to the left and right of the pentagonal crinoid columnal. The small fossil on the left looks like it might be part of a trilobite genal spine? And the three-pointed fossil to the bottom right I have no idea about. I feel like I've seen something similar before but can't remember.
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I am hoping someone on the forum might be familiar with Ordovician aged fossils from Fezouata. I believe this might be a large hyolithid but am not sure.
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This is a rare proetid. I don't know of another example in a private collection. This was collected in November, 2002, I don't really know which day within that month.
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- bracken county
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Another odd one! It's the same kind of surface I've found before, tiny spikes and bumps, and the previous one was suggested as some kind of lichid.
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Hello dear fellows, Any ideas about this one from Fezouata Shale? It has 2,8 x 2,0 cm. A Brachiopod, a Hyolith, a Chrondrophore, a Clam??? Thanks in advance.
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This is my third and final request for an ID today!!! I lean towards this being a trilobite. If there is doubt, I will use a hammer to help expose this. If it is likely a trilobite, I will work on it in a little less physical way. It was collected 2 weeks ago in SW Wisconsin, Platteville Formation, Ordovician. Mike
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On Sunday I went to a road cut in Ogle County, Illinois that exposes the Middle Ordovician, Platteville Group / Miffin member fossils. The below piece is something that I am having trouble identifying. Per @minnbuckeye request, I hope that these pictures are better. Any help with an ID would be appreciated.
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- ogle county illinois
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I found it near Byron, IL. Can see gabella.... I need confirmation. My guess is gabricersurus....?!?
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