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Showing results for tags 'cephalopod'.
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Leicester Pyrite Member. This layer between the Windom and the Geneseo black shale represents a sea of death. I find very few types of fossils in this hard to process layer of solid pyrite. Well preserved cephalopods and Placoderm armor (Placodermi is a class of armored prehistoric fish) are the most common fossils found. This very thin horizon can be easily found in the outcrop if you just look for rust dripping down and staining the grey shales below this pyrite layer. Every year or two, a piece of Leicester Pyrite will fall from its position high up in the outcrop and slide down to the creeks edge. It takes a lot of work to process the pyrite for fossils. Every blow with your hammer delivers the strong smell of sulfur and a ton of sparks. The reward for all this patience and hard work are fossils preserved in brilliant fools gold. This unit is also the only rocks in my area that routinely contain the armor of Placoderm fish. Click this link for a detailed description of this unusual formation - http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.835.6976&rep=rep1&type=pdf&fbclid=IwAR0qdFymJq-Hd1_SqU3j3yDw5Trl0ih_KohTv-26Du3b1m9g9s2IYKlW0Xc
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Bought this for $5.00 at an estate sale this weekend..........so.......there's absolutely no information on it, but someone prepped this. I believe it contains two species of Orthoceras? - off to the side, is this a different species?, or just a different plane of the same species?.......sorry- don't have specific measurements but the prominent one is about 1" wide and 7" long.......thanks! Bone
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Good morning folks. I have a Dolorthocera pseudorthocerid, nautiloid cephalopod. It's Carboniferous period from Serpuhovian Stage, Brontsy quarry, Kaluga region of Russia. Can anyone confirm the ID or provide a link where I can perform some additional research? Thanks in advance.
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From the album: Fossil Flourescence
I was playing around with the UV lamp in my lab, seeing what might unexpectedly glow this afternoon. This was a nice surprise. It's an internal mold of Bacculites sp. with sutures that fluoresce orange under 345nm UV light. Bright orange like this usually indicates calcite, a mineral that makes up fossil shells and some modern ones, too. Between the mud-filled chambers, the shell was preserved while the exterior of the cone wore away. The shell material was either calcite to begin with or, more likely, began as aragonite (same chemical compound as calcite, but different crystal structure and glows yellow instead of orange) and changed over millions of years to the more stable configuration of calcite. Meanwhile, the mud looks like it may have a little bit of some fluorescent minerals in the mix, but it's mostly a daylight-only affair. The blue may be some residual glue from a label. This specimen is from the late Cretceaous Pierre Shale Formation in South Dakota.© C. 2020 Heather J M Siple
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I came home this afternoon in some ridiculously warm weather for January (50F, 10C) and happened to look at a rock I'd collected from the Widder formation about two or three years ago that I had sitting out weathering. It was one that @Kane had quarried from his Gonaitite perch out of the Widder formation and kicked down to me. I'd originally kept the rock because it had a bunch of Mucrospirifer thedfordensis in it and I wanted to see what else would erode out of it. When I turned the rock over I spotted a small round fossil that was brownish... a different color than most fossils. It was pyritized so I chipped it out of the rock and took a look at it. It was a Gonaitite and one that I had never seen before! Most Gonaitites that I have found at Arkona are from the Arkona formation and fall into the Tornoceras arkonense genus, but this one is different. Tornoceras arkonense above, mystery Gonaitite below. I used a new tool that I recently purchased, a home tattoo pen, to clean out one side of it. The pen is quite effective on softer shale or limestone as long as the fossil is much harder. In this case it was pyritized so I didn't have to worry about damaging the fossil. It turns out that this specimen has a smaller diameter phragmocone than Tornoceras arkonense as there are prominent ridges (rather than gaps as in T. arkonense) along the sutures. The suture pattern is plain with a sweeping parabola facing backwards, a straightish line across the keel and then another parabola. I've looked into the usual sources ("CHECK LIST OF FOSSIL INVERTEBRATES DESCRIBED FROM THE MIDDLE DEVONIAN ROCKS OF THE THEDFORD-ARKONA REGION OF SOUTHWESTERN ONTARIO", Stumm and Wright, Paleontology of New York, Hall) and don't see much that correlates to what I've found. Anyone have an idea? The fossil itself is 7/16" (11mm) at it's widest and 2/16" (4mm) thick. It comes from the Middle Devonian aged (Givetian stage) Widder formation at Hungry Hollow, Ontario, Canada. Thanks for looking!
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Hi is this a Cephalopod or a Rugose coral it’s from the Onondaga formation. I have been told that it could be a a Cephalopod by one person and Rugose coral by another. Thank you!
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I found a drainage ravine with thousands of these these in them. I'm almost certain they're an iron concretion of some type but I've gotten several different identifications. I took a few of them to the MAPS expo last spring for an ID. One person said michelinoceras, but then an expert on cephalopods said no, definitely not, but he had also never seen anything like them. These were found on the north side of Dubuque, IA right at the top of the lower Galena dolomite just above the upper chert beds. They are in a thick sticky grey clay which sits just above a thick iron rich encrusted layer that varies from 1/4 to 1/2 inch thick (blackend hardground?). The clay layer is approximately 20' thick and contains thousands of these. They are almost all vertically oriented, cylindrical in shape, and vary from 1/2 inch to as much as 6 inches in diameter, and vary in length from several inches to several feet long. Some of the smaller ones that have weathered out do look amazingly like cephalopods. I had previously found a few pinky finger sized weathered ones farther down the ravine and thought cephalopod but then found the clay with the bigger ones. They have a center that resembles a siphuncle but I don't see anything that looks like septa or individual chambers. There are too many of these to think they haven't been found before but I can't seem to find anything describes them specifically for this area. I did find a paper from a study done in Finland titled "Ferruginous Concretions Around Root Channels and Fine Sand Deposits". That paper seems to describe what these may be be but since I've gotten a couple different ID's and none of them concretion I was hoping someone with a little more knowledge can tell me for sure. url to the research paper - https://doi.org/10.17741/bgsf/47.1-2.020
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Hi all, I have been working pretty hard to learn and identify my fossils as I collect them. I have one that I need confirmation on. I believe that it is an Orthocone Cephalopod but if someone can either confirm this or tell me what it is if I am wrong, I would appreciate it. This was found near Willow Springs, Missouri, USA. If my studying is correct, it should be from the Ordovician Period and from the Jefferson City/Cotter Formations. It measures a little over 57 mm long and at the widest point measures 22 mm across. The attached image is horrible. I cannot get any decent images with the lighting that I am using tonight. If it isn't good enough, I will take better images tomorrow. Thank you for your time and assistance. Doug
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Hello! Picked this up in a quarry in Livingston County, IL USA near the town of Ashkum.
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From the album: Urban Fossils of Toronto (Georgian Bay Formation, Lower Member)
Complete specimen of a late Ordovician cephalopod Treptoceras crebiseptum, even with the living chamber intact. The length is appr. 37 cm. From the Mimico creek, Georgian Bay formation, Ontario. Specimen found in shale and my first complete one!! I usually find small fragments of the phragmocone at Mimico creek. Also keep in mind specimens found in shale are preserved squashed, compared to the ones preserved in limestone they are preserved in their original shape.© (©)
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Hello, this is my first post to the site. I was out in Etobicoke Creek last Monday for the first time looking for fossils and had a few good finds. The first is what i think is a Crinoid, . The second one is part of a cephalopod (i think).
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We took our girls fossil hunting near our house for the first time. We found rocks with lots of little brachiopods but I also found this. Is this a cross-section of a cephalopod maybe?
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From the album: Finds From the Ordovician -488 to 443 MYA-
Section of Endoceras, from the Collingwood member of the Lindsay (Cobourg) Fm. -
So I have partially removed an orthocone from a nodule that I found in some eroded glacial till. The rock is most likely silurian in age but I can't don't recognize this orthocone. It seems to have faint striations running lengthwise down the shell, which I haven't seen before.
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Hi again! Two more ID requests - this time they're from the Bangor Limestone in Alabama, USA (Lower Carboniferous, Mississippian). Specimen #1: An orthoconic nautiloid - could it be Brachycycloceras sp.? Specimen #2: A blastoid - Pentremites sp.? Thanks for your help! Monica
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To continue discussion on the specimen listed here, with renewed focus on it being a Cephalopod. As of right now, I'm deciding between Solenocheilus and Ephippioceras. Going directly by the book: Index Fossils of North America (1944, 1980 printing), I can see positives for both. Solenocheilus (Lower Mississippian to Lower Permian, IN, IL, MO, KS, TX and Europe) Recommended by a local expert, but doesn't specialize in Cephalopods. Ephippioceras (Mississippian in Europe, Pennsylvanian, Ohio to Kentucky, Nebraska to Texas) The raised line along the midline of the plate photo is what is selling me on this one. My specimen is much larger than the plate, but not quite double the size. So, two new photos of the specimen. First, looking at the line: (After seeing it this way, I was looking at it 90 degrees in the wrong direction) Flipped, End over end. So, any opinions? I was thinking of removing more matrix from the matrix heavy size, but it will certainly remove the shell material and leave the steinkern.
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So this is a fossil from Beloit Wisconsin found in the Platteville formation. I am pretty sure it is a cephalopod but I have no idea what genus or species. The siphuncle is hollow except for two septa that run right through it. 3" post-it note for scale.
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5/13/19 Oglesby, IL Roadcut- Pennsylvanian shark bits, brachiopods and more
deutscheben posted a topic in Fossil Hunting Trips
A week ago today, I took the day off work to hit one of my favorite sites, a roadcut above the Illinois River in Oglesby, Illinois. This cut exposes the Pennsylvanian LaSalle Limestone member of the Bond Formation and produces abundant brachiopods as well as occasional other fauna including gastropods, cephalopods, coral, trilobites, and shark teeth. The weather was perfect, sunny but not too warm, when I pulled up. The cut is a somewhat unstable slope of cobbles and boulders of varying size, almost all with at least some fossils in them. To get up to the slope, you have to hop across a small ditch with running water. I have a good sampling of the common brachiopods from here, so I am looking for unusual fossils when I go now. I was very happy to quickly find a piece of trilobite as I started to search the rocks at the base of the hill. (I will put pics of everything I brought home in a response post) One interesting find that I was not able to bring home was this Linoproductus brachiopod with some shell preserved and a really pretty dendritic pattern on it- it was very delicate and firmly embedded in the middle of an ~80 lb boulder. I was able to stay for 4 hours, and I felt like I gave most of the site at least a quick look. I am very happy with what I found- I was able to check off many of the rarer things I was looking for, including shark teeth, a trilobite, cephalopod material, and a brachiopod with spines attached, as well as some nice crystallized brachiopods. I will post all of my finds below.
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I found this yesterday in Avoca, New York. It's about 3 cm long. The core looks like a cephalopod of some kind, but the exterior has me puzzled. If it were soft tissue, it wouldn't have preserved, but I have found impressions of a few others like this there and in another site over an hour away. The one field guide I have shows nothing like it and I may have to go hunt down the original 19th century sources. Any clues?
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Hey! I just took a trip out in the pouring rain to a road cut in Oglesby, Illinois. This road cut exposes the Pennsylvanian LaSalle Limestone member of the Bond Formation (thanks to @deutscheben for this info!) I found lots of beautiful brachiopods, but as I was heading out, this guy caught my eye. What do you guys think?
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I found these in the McGregor member of the Platteville formation in SW Wisconsin. Endoceras?
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I am nearly sure the top piece is Metacoceras. The middle is a clam, but what species? Perhaps Astartella concentrica? The bottom, what is that thing? 6477/6478 show it in detail. I find these a lot. Are they brachiopods? Not shown, but there is a horn coral on the back of the piece in a cross section.
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A walk down the creek in Longbranch yields marine fossils
markjw posted a topic in Fossil Hunting Trips
A 15cm fossil from "Nautiloid Alley" alongside the creek in Long Branch, Ontario. Also separate images from a "two-fer". For some reason, one sometimes encounters 2 or 3 close together in the same medium sized rock.
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This year I pulled the trigger on heading to Penn Dixie for the Dig With the Experts weekend! Definitely would highly recommend . I drove up from Boston to the Buffalo area on Thursday and spent the day Friday digging with @Malcolmt and @JamesAndTheFossilPeach. It was a blast! Thanks again guys for giving me a lay of the land. Credit to @JamesAndTheFossilPeach for the find of the day with a giant Eldredgeops (pic below). Saturday and Sunday were spent looking for trilobites in the roped off Dig With the Experts section of excavated shale with some success. Monday I drove back to Boston, and stopped to stretch my legs in Glenerie, NY to walk a stretch of road looking for Devonian brachiopods and gastropods. Got a couple! All in all, a great trip... although I'm nice and sore . Here are my takeaways from the weekend. I tried to get a bit of the entire Penn Dixie Ecosystem keeping at least one of everything and as many trilobites as I could find. I wish I took more pictures Saturday and Sunday, but I was too busy splitting shale . Cheers, Barret
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Found this cephalopod at Caesar Creek a month ago, just now got the chance to clean it up now that school is done. It's about 4.5 inches long and 1.5 inches wide. My best guess at ID is Cameroceras but if anyone thinks it may be something else please let me know. Looking at about 450 million years old. Before After
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