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Showing results for tags 'Ordovician'.
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From the album: Trilobites
Coll. by KB, purchased. Ontario.-
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- ordovician
- starfish
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From the album: Trilobites
Coll. by Thomas Whiteley from the Rust Walcott, prepared by me.-
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- cheirurid
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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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- edrioasteroids
- ophiuroid
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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
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I found some interesting specimens today I would like a second opinion on. Thinking both of these essentially complete bugs are Eomonorachus intermedius, but I'm not certain as they are both exposed ventrally. #1 After some cleaning #2- the second ventral specimen here is preserved hiding underneath an Isotelus pygidium and is very tiny! After some cleaning I think both of these partials are Eomonorachus as well. Almost exposed pygidium Half exposed cephalon showing good eye facet detail. Thanks for any feedback. -Jay
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- decorah formation
- missouri
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Hello all! I was scrolling through my home state’s fossil page when I came across this post from someone claiming they had a “special spot“ in western Kentucky where they found all of these fossils. Someone in the comments inquired about the ID, and he told them they are fossilized jellyfish. Obviously, these are not fossilized jellyfish. My first thought was geodized crinoid calyces, but then I looked closer and counted the plates- six rather than five, which is not what I’m used to for a typical calyx. Any thoughts?
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Microtrilobites and Other Microfossils of the Pooleville Member
Isotelus2883 posted a topic in Micro-paleontology
Recently I acquired some microfossil matrix from the Bromide Formation, in Oklahoma. They were of the Pooleville and Mountain Lake Members, containing a very diverse fauna, mostly bryozoans and crinoid arm fragments. While searching through the matrix, my main aim was to find some of the small and young trilobites that are often found here. Also, I had bought a trilobite meraspis previously, from the same locality. It is an enrolled meraspis of a Lonchodomas mcgeheei, from the Pooleville member. Views of the Cephalon and pygidium.  Now, here are the finds. A Cyclospira parva, these were very common and found in all samples of the Pooleville Mbr. These are the trilobites of the Lower Pooleville. What may be a partial Lonchodomas mcgeheei pygidium. It is more likely a brachiopod fragment, however. A proetid free cheek, I think. This one is more likely to be a Homotelus bromidensis cheek. I'm not sure for this cheek. Eoceraurus? Here are the trilobites of the Middle Pooleville Member. Calliops armatus partial pygidium.It is rather fragmented, as sadly most of the microfossils in this material are. This may be a trilobite pygidium, but it seems now that I look at it, it may be a brachiopod. Now here is one of my better finds from the matrix. It is a partial trilobite, with the hypostome in place, unusually. Because the dorsal side is not preserved, I don't know what species it is. Here are the fossils of the Upper Pooleville Member. A picture of some of what I found in the sample. A healthy sized proetid free cheek. Two partial cephalons of Frencrinurus capitonis. Though partial, they still show exquisite detail, including several sharp spines. Last, there is this specimen. I am hoping it is a protaspis of some trilobite, but... Yeah. Doesn't look like it. These samples gave a clear picture of the Bromide Formation, and they were rich with fossil fragments, an excellent test for my microscope.
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- brachiopod
- bromide formation
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From the album: Trilobites
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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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From the album: Brachiopods of Platteville/Decorah Twin Cities Minnesota
Specimen on the Left is bought online, from Wisconsin Mifflin Platteville Formation. Campylorthis deflexa is the middle one with Rostricellula minnesotensis Leftmost. Oepikina minnesotensis is rightmost. The specimen on the right is the closest Minnesota mifflin Campylorthis deflexa like specimen that I could find. It is darker color rock so its harder to see good textures but if you look closer toward the edge you can see where ribs are which makes it more coarse than the much more numerous Strophomena and Oepikina which are distinct characteristic in Twin Cities bed. -
From the album: Brachiopods of Platteville/Decorah Twin Cities Minnesota
All sources had says there are only two genus of the family of this particular brachiopod and Protozgya and Rostricellula is listed for Platteville Formation. Protozyga is too different and much weaker ribs structures by comparations. -
From the album: Brachiopods of Platteville/Decorah Twin Cities Minnesota
Like Anazyga recurvirostis, A. plinthii tend to prefer muddy limestones and is locally abundant where found in Twin Cities. -
From the album: Brachiopods of Platteville/Decorah Twin Cities Minnesota
Flatter than A. recurvirostis and a bit bigger. -
From the album: Brachiopods of Platteville/Decorah Twin Cities Minnesota
Very recently in 2023 paper came out that basically places all Zygospira earlier than Mayville/Richmondian in genus Anazyga. Cinnicinntea website also had name change for Anazyga recurvirostis since it also extends into maysville formation. The Decorah Formation Twin Cities can have a lot of those but oddly enough to me they are very specific to muddy limestone as I never find them in the weaker shales for unknown reasons. One of the tiniest Decorah Formation Brachiopod species I have ever found, tiny enough to balance on eraser end of pencil. Compare to the other Anazyga species it is much smaller and more inflated in shape. -
From the album: Brachiopods of Platteville/Decorah Twin Cities Minnesota
Those are the closest specimen I could find that I think is Anazyga lebanonensis. Described as longer in length than the other two Anazyga species from Decorah Formation. -
Now that the holiday festivities have past and we are waiting for the New Years celebrations, I thought I would finish up the year with a few ID requests on some Galena/Ordovician finds from NE Iowa last month. 1. 2 3. 4. 5. 6.
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I "rediscovered" a weird rock I found 6 years ago at a quarry near Belvidere, Illinois. The rocks exposed at the quarry are dolomitic ordovician Galena group. Last night, I took a closer look at it under a microscope and noticed that the spiny crystal structures seem to be formed by mycelium. I know mycelium breaks down rocks, but I'm curious to hear any thoughts/insight about this oddity.
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From the album: Swatara Gap
Enrolled specimen. Collector unknown.-
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- ordovician
- pennsylvania
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From the album: Swatara Gap
Collector unknown. -
From the album: Swatara Gap
Collected by Ed Books -
From the album: Swatara Gap
Collected by Steve Hess -
From the album: Swatara Gap
Collected by Steve Hess-
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- ordovician
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From the album: Swatara Gap
Collected by Steve Hess -
As I went through the rocks I had collected in October from the Ordovician's Galena, likely Stewartville Formation, a SMALL gastropod popped out of a piece of matrix that was split open. After looking thorough my references, I could not place this fossil. Hence the need of your help.
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I have found a few of these mis identified fossils from the Galena/ Ordovician. A request for identification was made awhile back and I labeled them Asgadaspira evolvens based on a response given to me. Having just exposed another one, I searched for it on line and nothing came up. Did I misspell it or am I just out in left field? By the way the first one measures 8cm by 5cm.
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