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Showing results for tags 'Ordovician'.
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I am attaching images of Ordovician trilobites in my collection. I found the free, online Geological Survey Professional Paper 583-E to be very useful for identifying the Flexicalymene and Isotellus trilobites. Comments/suggestions/corrections are welcome. The 1st image is of Ordovician Flexicalymene meeki trilobites that I found in a creek bed in the Arnheim (sunset?) formation in Mt. Orab, Ohio. I identified these trilobites as F. meeki based on their relatively wide and sharp cephalons (heads). This is in contrast to the relatively narrow cephalons of F. retrorsa. The 2nd image is of a specimen collected on the same trip in the same same creek bed. The large fossil I have identified as the pygidium (tail) of the Isotellus maximus trilobite because it is not nearly as narrow and triangular as the pygidium of a I. gigantas trilobite. In the upper left is a prone flexicalymene trilobite that I have identified as an F. retrorsa due to the relatively narrow cephalon (compared to the body). If these identifications are correct then it is clear that all three species were contemporaneous. The third image is of a prone Flexicalymene retrorsa (my identification) trilobite from the Arnheim formation in Mt. Orab, Ohio. Note the relatively narrow cephalon (head). Image 4 is of a Isotellus maximus trilobite from the Ordovician Arnheim formation in Mt. Orab, Ohio. I identified this specimen based on the presence of genal spines on the cephalon as well as the relatively broad pygidium. Image 5 is of a larger, beat up Isotellus maximus trilobite from the Ordovician Arnheim formation in Mt. Orab, Ohio. I identified this specimen based on the presence of stubs of genal spines. Image 6 is of an Ordovician Cryptolithus instabilis trilobite from Buith Wells, Wales. I had previously found a small arc like fossil with perforations in Cincinnati and I had no idea about the source. I only recognized it after I saw the cephalon of the cryptolithus trilobite. This particular specimen has very little contrast with the bedrock so I altered the exposure and contrast in an effort to improve clarity. Image 7 is of a small, Ordovcian Amypxina bellatula trilobite from the Bellatula formation in Edgewood, MO. Image 8 is of a 505-438 MYA Diacalymene trilobite from the Ktaoua formation in Morocco.MtOrab.thumb.jpg.e888655c877a84663d5e37201303b43d.jpg)
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- Amypxina bellatula
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I recently bought this gem remopleurides (?) trilobite and I think it could definitely use some work. my question is, how the heck do I find someone to prep this thing for a normal price without destroying it! I live in NC so the closer to me the better!
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Maco shots of fragmentary fossils.I get the shells - but what abuut that bkack branch (top picture 1.5 cm long) or that circular lobed structure (lower photo - about 2 CM diameter)) Really beautiful but can't figure out what they are. ? Corals?
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Nashville, TN - Hunting Ordovician Fossils in a Target Parking Lot
Masonk posted a topic in Fossil Hunting Trips
Hi All, Was in Nashville, TN for several days for a bachelor party! Had an amazing time enjoying music, food, way too many drinks, and even managed to squeeze in a fossil hunt! We had to Uber everywhere, so I picked a somewhat convenient spot, which just so happened to be a Target parking lot. This is part of the Cathey's formation, which is Ordovician. Most common finds here are Brachiopods. I spent about an hour here, but could have spent way more time, and brought back a lot more fossils. Some general photos of the area: That was not my cart, I promise! Target on the left. Stark contrast to my normal scenery in a New Jersey Brook. This and other similar formations are visible in multiple places throughout Nashville. Easy pickings... Small Brachiopod hashplate.
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From the album: Trilobites
Taxonomy: Ceraurus sp (enrolled) Age: Ordovician - Katian (Verulam Formation) Location: Brechin, Canada Source: Field Collection Remarks: composite image of front and back. Lightly cleaned using baking soda and toothbrush.- 2 comments
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Snow storm overnight allowed me some time to expose this cephalopod in it's Galena/Ordovician matrix. Only the crystals were exposed so I was happy with what was hidden beneath the rock. As I have said many times in the past, I love the combination of fossil and crystal.
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It’s from Hubei, China and no age is given other than Ordovician. Apologies for the blurry images, it’s been shipped to somewhere else for a bit.
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Sacramento Mountains - New Mexico, Ordovician - Mississippian exploration
Kato posted a topic in Fossil Hunting Trips
This was purely an exploratory hike to a remote area with no expectation of finding much. In that regard, I was not disappointed. I'd previously last covered some of this ground about 5 years ago and had forgotten how formidable it was to get into. The walk in a rocky canyon bottom for about 2.8 miles before taking another rocky side canyon ending at an Ordovician-Silurian dry water fall. Approaching the base of the dry water fall with Ordovician bedrock that was pretty much non-fossiliferous. At the base of the dry water fall to get a nature shot. This looks like it should be climbable and, perhaps it is, but I'm getting a bit too long in the years for such risky business. I took a bushwhack side trip up a steep hill. Fortunately, it had rained recently and the otherwise loose scree was a delight. Even if one could climb the lower falls they are faced with an unclimbable Silurain vertical wall. A view of that dry fall from the other side.
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Howdy folks! I’ve had a lot going on so I haven’t been super active on here as of late, but I wanted to do a little recap of some of my favorite finds and acquisitions of 2023. Hope yall enjoy! Thanks for looking! First up is by far my favorite find from last year. This bug was collected as a ventral specimen in February, and was flipped and prepped dorsally by Jon Ginouves. Hypodicranotus striatulus is an exceptionally rare species from the Middle Ordovician Trenton Group of NY and equivalent strata in Canada. This is the first NY specimen I have ever seen or heard of coming out of strata outside of the Walcott-Rust Quarry. Up next is another piece from the same locality as the Hypodicranotus. I believe this came out of the site in the late spring or early summer. Generally, juvenile Gravicalymene magnotuberculata are near impossible to find, but I stumbled upon a mass plate containing around 20-25 specimens ranging from prone to fully enrolled. It is entirely possible that this is the largest cluster of this species ever collected, which is pretty sweet. This pic doesn’t show the whole plate, but you can get the general idea of how plentiful the trilobites are! This next specimen is just a cephalon, but it is from the iconic and very rare Walcott-Rust Quarry trilobite species Sphaerocoryphe robusta. This was found when I visited the locality in June with @KompsFossilsNMinerals . Normally I only focus on trilobites while collecting, but this past October I made a couple short visits to a Fiddlers Green Formation eurypterid site very close to my college campus. Eurypterid material is very sparse, but I did find some pretty interesting pieces. The most exciting of these was a partial Dolichopterus macrocheirus specimen showing the prosoma, 2 tergites and most of the appendages. Along with the usual trilobite suspects, I also ventured into some new territory strata-wise. I was able to visit an Onondaga Limestone locality several times during the summer and fall where I found half a dozen or so Odontocephalus selenurus specimens. Through my work in the Tully Limestone, I have become good friends with Steven Mize, who primarily collects the unit’s trilobite species. He invited me to come collect the Tully with him in July, which is when he gave me this beautiful enrolled specimen of an undescribed Basidechenella sp. While out collecting, Steve found this plate of 6-8 undescribed Asteropygine sp. , which he was kind enough to let me keep! During this past fall, I became very interested in the various Cambrian biotas of China. Here are a couple of Radiodont appendages I acquired. I believe the first one is Guanshancaris kunmingensis, and the second is Anomalocaris saron. This is my favorite trilobite I acquired from China. Although it is only a partial, this Redlichia mansuyi from the Guanshan biota exhibits one of its robust antennae!
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My hunting grounds locally involve the Ordovician Galena. It has a very characteristic rock structure EXCEPT in a local quarry where everything is crystalized or preserved in odd ways. This is how most brachiopods are found. But I am here to see if this brachiopod exposes pieces of it's lophophore or whether this is just another odd preservation from this site.
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Searching for the Ordovician-Silurian boundary in Iowa, Midwest, United Stated
Schroeder88 posted a topic in Questions & Answers
I'm wondering if anyone has any knowledge of what I should look for when determining the obvious signs of the O-S boundary. If there is a general strata or formation I should keep my eyes open for when looking for it? I keep seeing a reddish boundary when I search for it online. However, I can't find any pictures from anywhere within 1000 miles of where I am, so am a bit skeptical. Any help would be great! A clear picture would be better! This image is from Manitoba, Canada. It's description is a bit vague.
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Trying to figure out what type of fossil this is, possibly a plant?
Schroeder88 posted a topic in Fossil ID
I was breaking apart pieces of a sort of shale from the Graf Iowa site and found a few of what look to be fern fronds? But I'm only an amateur, Just found them interesting, after breaking apart many and finding nothing interesting. It looks like the one still has organic matter imprinted in it.
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Last weekend I had the opportunity to spend a few hours collecting in a quarry in northern Illinois that exposes most of the Galena Group (Late Ordovician). There was lots of fresh rock to hunt through, and it was a good and productive trip. As usual, lots of gastropod molds were found. Hormotoma sp. Liospira sp. Sinuites sp. Lophospira sp. Subulites sp. Unknown gastropod. Looks like Liospira but appears to curl in the opposite direction. Brachiopods show up too. Most common are molds of what I believe are Rafinesquina (@Tidgy's Dad?). The inarticulate Pseudolingula iowensis is somewhat common. Specimens are almost always crushed and missing shell, but they usually have some shell preservation which contrasts nicely with the yellow matrix. Occasional bivalve molds are found. This one has calcite? crystals. Trilobite parts are uncommon, and the only species I've seen from this quarry is Thaleops, possibly Thaleops laurentiana. Here is a cephalon I found. Now for my favorite finds of the day. A partial specimen of the small receptaculitid Ischadites iowensis. Fisherites is very common at this site, but I had not come across Ischadites before. A partial conulariid. Judging by the visible cross section, the back side is present, so this should hopefully prep out nicely. And finally, what might end up being a complete trilobite. Not sure if there is any more buried, but it does look like at least some of the shell is preserved, so fingers crossed!
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Quick Stops throughout Canada-NY, Focusing on Toronto
Isotelus2883 posted a topic in Fossil Hunting Trips
This week, I had an opportunity to make some very quick (>30 min) stops along the way to a conference in Toronto, and on the way back. 1. The first stop was in Montreal, pretty close to the hotel. It was an exposure of the Tétreauville Formation. A 20 minute stop, coupled with the fact that even fragments of shale had to be pried out of the frozen ground, and that the shale was mostly empty, made this not the most productive stop. I did manage, however, to find some trilobite fragments. Starting with some small shell-less Sowerbyella sp. And of course trilobite bits, negatives, of course because my luck is just like that. Flexicalymene senaria Cheiruridae indet.
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- bivalve
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I dissolved limestone from Michigan in acetic acid and got some interesting things, among them these. The source for the limestone is unsure of their exact age. Ordovician-Devonian. Any ideas?
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Trace burrows.. species? Central NYS, glacially transported cobble from till. Likely constrained to upper Devonian to mid Ordovician. Siliciclastic, clast supported, fine sand to silt, little clay, moderately well sorted, sub-angular, quartz, feldspars and lithic fragments, highly porous matrix, 6" on long axis. Thanks in advance..
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Hi. In this rock from Swatara in PA (ordovician), I see three fossils: (1) Looks like a leaf, about 1" across (2) round stone-like object about 1/2" across, and (3) small rippled shell about 1/4" across. Any IDs would be much appreciated! Thanks!
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Spring is finally coming around. Here in Missouri, we are getting a mix of nice weather, lots of rain, and even still some colder frosty days. I was off work yesterday, and the great weather had inspired me to go check out an Ordovician road cut I did some recon on last month. The roadcut isnt very large, but with the hard rain we had received this past week I figured it would be a good chance to rummage through the bedrock and scree pile. Within 5 minutes, I found my first find. It is likley an enrolled Eomonorachus intermedius trilobite. Unfortunately there was a crack running right through it. The trilobite was very small, measuring in at .25 inches. This is were things went wrong. I didn't bring any glue with me, and figured I would chance trying to extract it as-is, even with the crack running through it. Big mistake, as it can out in two pieces. This specimen was missing it's eyes and some shell, so I wasn't too distraught. About 10 minutes later, I found another enrolled specimen, this time with the tail exposed upright. It also measured in a .25 inches in length. It is likley also an Eomonorachus intermedius, but will need cleaned for a confident ID. After extraction, I walked to my car to put up my grinder and I couldn't believe what I saw just laying on the ground. Another trilobite! It is a miracle this bug was intact. I was amazed to turn the trilobite around and see some of its eye lenses looking back at me. It is a great day when you find a trilobite in Missouri with how rare they are, but to find three in one day is downright spectacular. This specimen isn't perfect either. It's compressed, missing it's genal spines, and also has it's tail tucked under the cephalon likley due to compression. Regardless, I am very happy with it. It should clean up well! I also snagged a nice little Isotelus hypostome. After that, I packed up and headed for home. I had a great time out, and will definitely have to check out this location again after time has passed, and some more weathering takes place. Thanks for reading!
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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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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. -
As an avid fossil collector growing up in Cincinnati, I found that even partially complete echinoderm fossils were as rare as hen's teeth. I did eventually find one edrioasteroid on a rafinesquina shell but it was poorly preserved. I have however found some nice Ordovician echinoderm fossils from Morocco. I will kow tow to you if you happen to find one in the Cincinnatian. Attached are three Moroccan Ordovician echinoderms. Note that the labels are in 12 point font.
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I’m about to head out. I should be there in about 90 minutes. This should be a good trip because it’s the very beginning of the fossil hunting season in this area., there have been a number of snows and thaws during the winter, very few people have probably picked over what’s been exposed over the winter yet, not too much weedy overgrowth, and the weather in the mid 60s, can’t get much better than that
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After growing up in Cincinnati, the Ordovician has become my favorite fossil period. I would like to acquire an Ordovician scaphopod (tusk shell) in a effort towards completing my mollusc specimens. I have a number of items to trade. This might include an Ordovician Flexicalymene meeki trilobite that I found, or possibly an Ordovician brachiopod or gastropod. I also have other fossils to trade that might be of interest. If you are interested, send me an image of your specimen for trade and I will send you images of items that you might consider trading.
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I am attaching two images of an Odovician receptaculite fossil from Scott City, VA. As it was considered to be a sponge when I acquired it I was thrilled because I had only previously seen disarticulated sponge spicules. There appears to be a more recent debate suggesting that receptaculites are algae. If one accepts the first image as the top of the fossil then the structure is consistent with sponge diagrams I saw in a high school Biology class. So how about some opinions on whether or not it is a sponge or fossil algae. So,is this the top? Or is this the top?
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Hello. New member here. Would appreciate some help with an ID, please. Found in Williamson County, Tennessee, USA. Rock formation is Nashville Group (Ordovician). Exposed fossil length is about 1/4" or 6mm. Thank you!
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