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Showing results for tags 'orthocone'.
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Appart from the ususal goniaties that I find in my favorite hunting spot, I do find some other cephalopods there from time to time. Last trip I found a realy nice orthocone. the fossil shell is 18cm long. I used a combination of mechanical ( airscribe ) and chemical ( potassium hydroxide ) prepparation. pictures as found, during prep and after prep:
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i stopped into a spot on the way home from up north and found a bunch of the same which i might normally find however this time i also found something i am not familiar with... the botryoidal one.. any ideas? found a sunflower coral not pictured as well although it is beat up not too showy
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Hello all! Recently I have been obsessed with cephalopods and realized there is a real lack of reconstructions of the color patterns on extinct nautiloids and ammonites! This led me to compile a list of known fossil color patterns on cephalopods. After a year of on and off research, I found about 90 species of cephalopods retaining official or undescribed, original patterning on their shells. These are the first 15 species on my list. The color markings are based both on descriptions and photographs of the fossil material. The shades of the markings are based on the fossils, bu
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Newbie here. Discovered this fossil on the shoreline of Bruce Peninsula, Ontario Canada, Lake Huron side in Dolomite rock. Is it Orthocone Ammonoid or Orthocone Nautiloid or something else? I believe these are common finds in the area but this one is much bigger than others I have seen and the creatures shell appears partially fossilized rather than just an impression. Any insight appreciated including possible age. Thank you.
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On my eighth trip to the locality, I collected fossils at the famous St. Leon roadcut. Exposed were the Waynesville and Liberty formations, which date to the immense coral reefs of the upper Ordovician, or 450 ±5 MYA. The site was heavily picked, its erosive forces slowed during Indiana's summer heat. My drops of sweat evaporated on the sun-tempered limestone faster than I could count to ten. Despite the setbacks, acquisitions were generous. Best for last. Behold my brachiopods. The top row is Strophomena sp., the top-left sample demonstrating encrusting bryozoan. The second row is
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I found this in St. Leon, IN, Waynesville formation, and was just wondering if it was an orthocone fragment or something else. Thanks!
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- waynesville formation
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From the album: Mahantango Formation
Spyroceras-
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Since we both had the day off, my daughter and I spent a couple of hours at the Deer Lake site (Schuylkill County PA). It was a beautiful sunny day in the mid 50s! A good start to this years fossiling adventures...
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Hello. Any comments on this find (3 photos below) at Mimico Creek in Toronto (species, anatomy, etc.) would be appreciated!
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Unidentified Orthocone Nautiloid with Reptaria stolonifera colony.
Fossildude19 posted a gallery image in Members Gallery
From the album: Fossildude's Middle Devonian Hamilton Group Fossils
Middle Devonian Mahantango Formation. Swopes Farm/Turbotsville borrow pit. Turbotsville, PA.© 2021 Tim Jones
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Graf, Iowa Orthocone Shell remnant or epibiont?
Crusty_Crab posted a topic in General Fossil Discussion
This is Isorthoceras sociale (Hall, 1877) from the Ordovician Elgin member of the Maquoketa from the well known Graf, Iowa location. They exhibit unusual preservation, including nacre and hollow camerae. According to Invertebrate Fossils (1952) by Moore, et al,, shells of nautiloids have an inner annulus layer, middle nacreous layer and outer porcelaneous layer. Is the circular pitted texture on the outside then the remnant of the porcelaneous layer of the shell or some sort of epibiont like a bryozoan? Plate 220 of Shimer and Shrock's Index Fossils o -
Fossil forum, This is another fossil from the Leighton formation. It is a completely undamaged orthocone nautiloid. I think it is the same species that I showed earlier in the possible fossil coral post, but I am not sure. The external mold has the same grooves, but the internal mold is divided into two sides, each with bumps. Is this normal for a nautiloid fossil? Any help would be appreciated. Here are some pictures of it (internal mold on the left, external mold on the right):
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From the album: Missouri Ammonoids, Nautiloids and Gastropods
Found this almost a year ago at this point -
Hello everyone I have a pretty small collection, so I thought why not share it since it would only take a few posts? First up, these are my only self collected fossils. From walking along the Humber river in Etobicoke, which puts them in the Georgian Bay formation I believe. I would love some more information! Sweet little orthocone is why I took this one home. The back of the rock which shows an imprint of somebody's shell. There may be some other stuff going on in the matrix here but I've got absolutely no idea. Another orthocone with siphun
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From the album: Middle Devonian in Central New York
Michelinoceras telamon Middle Devonian Hamilton Group Moscow Formation Windom Shale Deep Springs Road Lebanon, New York Collected 7/18/20 -
Fossil ID help: Brachiopod, Crinoid Stems, Dolphin tooth, Orthocone Nautiloid
Praefectus posted a topic in Fossil ID
Hello. I'm working on organizing my collection and was wondering if anyone could help me with some identifications. Thanks for any help. I don't have any info on this one. I think it is a Mucrospirifer brachiopod. Can someone confirm this? Help with the species name would be appreciated. Thanks. These are crinoid stems. I don't have any further information. Does anyone know the species, where they came from, or the approximate age? Thanks. I think this is a dolphin tooth. It was found on the Ernst Ranch in Bakersfield, California. Can a- 11 replies
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From the album: Fossils of the Upper Ordovician Lorraine Group in New York
Orthocone cephalopod Upper Ordovician Lorraine Gr. Whetstone Gulf Fm. Jefferson County, New York Collected 11/11/19 -
Last year while on a fishing trip in Ithaca, NY I found this as well as some brachiopods in a small outcrop of shale along a stream. I’m pretty sure it’s Devonian in age but I haven’t been able to identify the species.
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It has been a while since I've posted on the forum, so here is a prepwork from this weekend It is a late devonian orthocone, it was quite a hustle to get this out of the rock, it broke in 3 pieces during the extraction in the field. Only a part of the shell was exposed, so I took a whole lenght of matrix back hoping that it contained a whole specimen, and it did The prepwork went realy well, and even the tip of the orthocone was preserved. The 3 parts glued back together, showing only a glimps of the orthocone: clearing out the fossil:
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From the album: Urban Fossils of Toronto (Georgian Bay Formation, Lower Member)
Endoceras proteiforme, found in the Humber river area. Late Ordovician, Georgian Bay formation, Toronto, Ontario. Length is approximately 35 cm long with a nickel shown. This specimen is a portion of the whole fossil that is still to be excavated (it's just so difficult to dig out) and the remaining body of this thing is still there at the site where I got this.© (©)
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From the album: Urban Fossils of Toronto (Georgian Bay Formation, Lower Member)
The smallest complete Treptoceras crebiseptum specimen in my collection. It even has the body chamber. Length is 10 cm long. Found in the shales of the Georgian Bay formation, Lower Member at Mimico Creek in Etobicoke, Ontario, Canada. Late Ordovician. -
I spent yesterday trying out a location along the southwest corner of Tug Hill Plateau in Oswego County NY. There is a road cut exposure that is very weathered. Lots of crumbly mud- and silt-stone, interspersed with sandstone. I couldn’t get very low on the exposure because the river that the highway crosses was high, no shelf or margin of error to climb down. On the Rockd app, this is supposed to be late Ordovician Pulaski and Whetstone gulf, and I wanted to find trilobites. I think I found one fragile flexicalymene, Prasopora (chocolate drop bryozoan), and a big orthocone. Very few tril
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I finaly got around putting all my best cephalopods specimens that I collected over the past 4 years in the frasnian of southern Belgium on there place in the cabinets. They all come from the same location. (except an orthocone and a receptaculites from the same age but from a different spot ) most of it has already been posted in individual posts, but this gives an overal vieuw of the part of the collection on display. Enjoy al the Manticoceras, Crickites, Tornoceras, Bactrites, Orthocones and more
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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!
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small orthoconic nautiloids versus tentaculites? What should I look for?
SteveE posted a topic in Fossil ID
Blair County, Pennsylvania (USA) Silurian... According to the map the likely guess is Clinton Formation, but my gut on site said "Wills Creek" Anyway, what do I have here? Small straight nautiloids or Tentaculites? How do you tell them apart?
