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Showing results for tags 'Ordovician'.
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My last trip exploring the Maquoketa of Minnesota, a formation that is abundant in cephalopods, provided me with a serpenticone shaped specimen that I do not recognize. Help IDing this would be appreciated. The siphuncle is not visible in this specimen. I did some infill with putty to enhance its look (in my opinion). The small repair is delineated by the red marks.
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Can you help determine if these are real as described and any steps I might take to further confirm the details? [seller verbiage removed -- Staff]
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From the album: Minnesota Ordovician Decorah Cephalopods
Above view of fragile specimen of Triptoceras lambi-
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From the album: Minnesota Ordovician Decorah Cephalopods
Triptoceras oweni - heavily bryozoan encrusted specimen. Medium sized for a Decorah Formation Cephalopod. Twin Cities Minnesota Ordovician.-
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From the album: Minnesota Ordovician Decorah Cephalopods
Typical view from above. Two specimens - one looked too odd to be a bryozoan.-
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From the album: Minnesota Ordovician Decorah Cephalopods
Triptoceras planoconvexum appear to be medium sized compared to the other Triptoceras species from Decorah Formation in Twin Cities. Rare.-
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From the album: Minnesota Ordovician Decorah Cephalopods
Very worn specimen with barely any details left.-
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I found this around the where the Cincinnati, Findlay, and Kankakee arches meet in grey clay with nothing else around it - not sure how to identify, any help appreciated.
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From the album: Minnesota Ordovician Decorah Cephalopods
The cut half which is a very thin shell filled with calcite minerals in a geode meaning it was complete hollow at the time of fossilization process.-
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From the album: Minnesota Ordovician Decorah Cephalopods
Apparently Whitfieldoceras mumiaforme lasts into Decorah Formation from Platteville formation. This specimen has barely visible septae and is very thin. Seem to have enlargement on the left side which is constant with Whitfieldoceras and a bend along a certain portion of the shell. Ordovician, Decorah Formation, Twin Cities Minnesota. Rare.-
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From the album: Minnesota Ordovician Decorah Cephalopods
Poterioceras apertum found in St. Paul Decorah Shale Spring 2023. Rare from the looks of it.-
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Howdy folks! I recently had a family trip to Ontario, and found a few rock exposures throughout Kingston to rummage around for fossils. I was digging into the Ordovician aged Gull River Fm, which has chert-like rock that I still find somewhat difficult to process. I managed to snag a little bit of rock to add to the weathering pile, and today I’ve found some interesting specimens. I’m looking at two unidentified pygidiums, and I believe I’m looking at half a Cephalon on the final slide. If anyone has literature they don’t mind sharing on the formation I’d love to read up, and I’d appreciate a little help ID’ing especially the Cephalon in question.
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Hi I really enjoy the Paleozoic, Stratigraphy and hunting topos for different fossil clusters and qualities. Thanks for the help already y'all seem great.
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Found this in the Cincinnati arch along with standard brachiopods and rugose corals from Ordovician. I was thinking some sort of bryozoan? Crinoid ends don't look like this?
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This tiny gastropod has me stumped. Does anyone recognize it? Thanks for any suggestions!!!! It reminds me a bit of Trochonema, but seems much different from those I have found in the past.
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This is a molt fragment of Isotelus sp. that I found in the Drakes formation in one of my usual spots. I've found isotelus pieces before, but this one is odd to me. In particular, I don't know what the lines on it are (not the cracks, I have the lines I'm talking about outlined in the pictures). I thought they might be a possible injury but I'm not sure.
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We recently found these brachiopods and I was wondering if anyone is able to provide any more information about who they are. They were collected on the Western cost of Newfoundland and they are early to middle ordovician in age. If you have any other questions regarding the fossils let me know and I will do my best to answer. Anything would help, thanks!
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Age: Ordovician: Approx. 454-452 Mya Formation: Decorah Shale Location Grant County, Wi Amidst the frequent outcroppings of Platteville Limestone in Southern Wisconsin, you occasionally encounter the overlying Decorah Shale. From what I read this formation is more frequent north of Grant County, and in Minnesota as well. The outcrop itself is roughly 200 feet in length, and only extends about 6 feet from the ground. Its located in a very remote area, amongst a sea of corn fields. Here are a couple finds from my third trip to this locality. Here is a complete crinoid calyx with associated pinnule filtering appendages. Complete crinoids are much more common in Silurian/Devonian stratum. Next is a hashplate, with a few assorted brachiopods and crinoid fragments. There were also a handful of brachiopods to be found alone as well. All of these are very similar to the Ordovician Lepidocyclus perlamellosa/H. capax. Although these were much smaller in size. A single Lingula inarticulate brachiopod, which was a huge surprise since this was my first one ever. I found a mid sized orthoconic nautiloid. This one is 7 inches (17.7 cm) in length. The approximate width at its widest end is 2 3/4 (6.9 cm). Note the visible septa markings on the specimen. This is an internal mold, so structure is a little different from that of a normal mineralized specimen. Not the largest from this site, as others I've recovered push 25 inches (63.5 cm). The internal siphuncle is exhibited here in cross section: I marked the cross section and direction of the siphuncle here. Phragmocones from this locality only preserve as internal molds without any calcified structure. As a result of poor preservation they can be difficult to spot. With a trained eye, it becomes significantly easier. Here are some additional brachiopods that I dug out from this locality. A fennestellid bryozoan as well. There were a few, but none to write home about unfortunately. My favorite finds at this location are by far the large nautiloids, which have been consistently produced from here. (If only I could find one at 6 feet now ) If anyone has an i.d for that crinoid calyx, I'd be happy to post measurements or more detailed photos. Other than that I hope to run out to Indiana sometime within the month, maybe I'll see some of you out there. -Jonah
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I’m helping fellow forum member @DrDave move and we came across this piece he collected from the Whetstone Gulf formation a couple years back. My immediate thought was “holy ___ that’s a jellyfish!!” but I can’t say for certain but oh my gosh if it’s not a jelly then it’s done a wonderful job at looking like one lol. any thoughts from the folks here ??
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Seem to be two different group (I'm talking about the larger shells not Sowerbyella minnesotensis) but I'm not sure. Top rows appear to have wave like ripples described as Bellimurina charlottae. From Southeast Minnesota in solid beds of limestones associated with Decorah Formation. I wish I have one showing inside of shell hinges.
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Should I invest in the equipment to prep this?
Alexthefossilfinder posted a topic in Fossil Preparation
Hey guys, I recently found this gastropod, which with help from the Forum I believe to be a Trochonema Umbilicatum. As I've looked at the rock more and more, I've noticed these shapes which look like they could be more individuals. I circled them from multiple angles, there appear to be 5 if I'm correct. I'm contemplating buying something like an airpen to reveal more, but I also don't yet have a lot of fossils that I would be able to use it on. Should I invest in an airpen or something similar to prep this and also have for future finds? If so, where would be a good place to find a good quality product at a reasonable price? -
While doing yard work I came across this rock sitting between my house and the neighbors. After walking past it a few times I flipped it over to find this gastropod, which is the largest and most well preserved I've found so far! I haven't found a genus or species yet, so feedback is highly appreciated, but I wanted to share it as a reminder as to what you can find even in your literal backyard
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Collecting trip to the world-famous Walcott-Rust Quarry
Nautiloid posted a topic in Fossil Hunting Trips
Howdy! Last week, @KompsFossilsNMinerals and I were invited by Dan Cooper to go collect the Walcott-Rust Quarry this week, so today we both got up bright and early to make the trek out to the central Mohawk Valley for the day. After fueling up on some pancakes from Denny’s, we made the last leg of the trip to the site, which is far from easy to find or get back to! It wasn’t long before Chris and I had both found a nice crinoid calyx, and the day just kept getting better! I mainly surface collected in the piles of weathering rock around the quarry, while Chris and the rest of the guys worked to get down to and peel up some more chunks of the Ceraurus layer. I had heard that the site was pretty difficult at times, so my hopes of finding anything weren’t too high, but not one of us left home empty handed! Collecting at this site has been a dream of Chris and I’s, so this was such an amazing opportunity for us!!- 13 replies
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From the album: Trilobites
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