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Showing results for tags 'bivalve'.
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I have 11 specimens of this, and all of them are incomplete. I am posting an example that shows the salient features that apply to all. This is from the lower Devonian Birdsong Shale member of the Ross formation in Parsons, Tennessee. All specimens are 30~50 mm ovals consisting of growth rings only, and any hinge area is missing from all. The rings have no radial features or ornamentation. They are very shallowly concave and seemingly have no prominent apex The growth rings center from what appears to be a muscle scar, and the outer ring is always slightly thicker and wider. The shell is quite thin at about 1 mm. I can post other photos, but this one has all the key features that are perplexing me.
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Dear fellow forum members, I am going through old boxes, in this case with some of my rare own finds (as opposed to bought, gifted and inherited fossils) These I found at a coast of the mediterranean, where the waves gnawed at soft sandstone. On a ledge below the fossiliferous layer there where fragments and some intact shells with and without remaining matrix, and this tooth, without, but weathered and feeling heavy. The shells I could identify (Diodora, Arca) do have living species, Diodora goes back to the Miocene, not sure about the others. So the age could be miocene to "subrecent", or maybe the tooth is much younger than the shells, impossible to tell. Who can tell me whose tooth this was? Thanks J
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Lots of large Inoceramus bivalves from the middle unit of the Pierre Shale (kpm). Almost every rock I flip over is a bivalve been having fun hiking around
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ID help. Crustacean, mollusk, or something else? Upper carboniferous.
Gramps posted a topic in Fossil ID
I have found several of these in an outcropping of shale and limestone in the Iola Formation in Northeastern Oklahoma (middle Pennsylvanian). The longest dimension is about 15 mm (≈ 5/8 inch). Some of the other specimens are slightly larger, but all have the same pattern of bumps. (I photographed this one because it shows the least wear.) I’m wondering it might be the carapace of a phyllocarid or some other crustacean. Alternatively, it might be a bivalve or other mollusk. Any help with ID would be appreciated. Focus and exposure were difficult, so there are several images. Best wishes.
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Years of searching Wisconsin's various websites and old Geo surveys have always yielded varying levels of success ranging from mediocre, to misses entirely. Not this time, this is effectively the best hunting I've ever had in my home state. Period: Ordovician Formation: Platteville Location: SW Wisconsin Endoceras? I say that primarily based on size. Goniaceras, the flattened curved shape seems to support that? Gabriceraurus mifflinensis? It is a fragmentary cephalon, but that species is more common than other Ceraurids that I've read about. Sinuites? A common gastropod, I saw maybe 30 of these, but only grabbed a few. Unkown gastropods and a large bivalve that I recovered. I've only ever found one other bivalve from Alabama. An unkown brachiopod. Reminds me of Enteletes from Kansas. I really can't seem to find anything on these at the moment. A Strophomenid brachiopod. These are my favorite variety, I've got at least 200 from Michigan alone. Some various hashplates with Rugose corals, gastropods and other various Fauna. I found 3 productive locations worth a repeat on my scouting trip. Here was a singular find I recovered out in the boonies near the Iowa border. Ive got some 3 and 4 foot long associated crinoid stems from Kentucky, but this is far better than any little fragement I could ever get in Milwaukee. Measures roughly 7 inches. This trip was a real game changer, I understand now that Wisconsin is ripe for fossil plunder, for those able to find its secrets.
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Hi! I’m still trying to identify one fossil from a particular unit of Pleistocene/Early Holocene lacustrine silt from my hometown of Saskatoon, but I figured I would look away from it for a bit to try and identify another fossil from the same unit I’ve been unable to classify. I have two specimens, both apparently of the same species. They are both approximately 0.5 millimetres across. They are perfectly circular, with lines radiating from the centre and rings of alternating colours (possibly representing growth lines). One specimen is photographed dorsally, showing its circular shape, the other in profile, showing its umbrella-like, protruding outline. All photos are taken through a microscope with my best camera currently available, an iPhone! My main areas of middling expertise are arthropod and vertebrate fossils, so I have no idea what this is! I have briefly studied fossil foraminifera and diatoms in the past, but it looks like nothing I’ve seen in those areas as well. It reminded me of a small limpet, some type of seed or spore, or perhaps even a strange fish scale, but I have no formal suggestions. I’d highly appreciate any help! I will try to supply any additional information you may need. Thank you!
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From the album: C&D Canal Micro Fossils
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From the album: C&D Canal Micro Fossils
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I have found a few of these oyster shells near the top of the upper Glen Rose. This is about the only real fossil I find in the area I can look. Hope that it's identifiable. There is an Edwards (Fort Terrett) cap on the hill I find these on. I don't believe they are washing down from there but it is possible. All I have found have very flat bases with an obvious wedge shape to them. Only found what I assume are the bases, never a top. First post on here so don't be too brutal.
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It is often seen, but no taxonomic information is available. Ask an expert to tell me which bivalve left the most common agate shell. Thank you for your sharing.
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Hello, I found this on a beach along Croatian coast and was unlike any of the surrounding rocks/geology. It's symmetrical and submarine-shaped. I'm wondering if it's a fossil v. a natural formation. Any information is greatly appreciated!
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Hello everyone, This weekend on Sunday my family and I made a short trip out to Central NY to do some fossil hunting. I was planning on doing this on my actual birthday which was on Monday but due to the weather we decided to do it earlier. As a result the trip ended up being more spontaneous, shorter than expected but still very enjoyable. The first stop was DSR, this was my second time at the quarry and although I didn't get as diverse of a selection of fossils this time (probably just being more picky), I got some nice specimens of a few new species as well as ones I already had. Here are some highlights: It was a great day for Spinocyrtia granulosa, lots of specimens, a number of complete ones. I especially like two of these This one is complete with very nice preservation and it's quite large. This one is the largest specimen I've seen. It's only one valve but in width from the wing tip to the end it measures right around 7cm, had it also had the other wing tip it would probably reach around 8cm. It also has some kind of borings around the commissure, I assume these occured after the animal died and the shell disarticulated, although I am not sure what kind of organism this comes from. I really love specimens like this as they tell such an interesting story of this long gone environment. Found a few nice Athyris spiriferoides, I really love these brachiopods and was excited about that. They were quite common this time but for some reason last trip I didn't collect a single one. A pretty nice, complete Mediospirifer auduculus This specimen I was very excited to find, I am not 100% sure but I think it might be Eoschuchertella arctostriata? Very beautiful in my opinion this is only an impression but I don't have any other specimens so I thought it was worth keeping. I believe this is Hyolithes striatus? Found a number of nice bivalves This slab has an Athyris and two bivalves, Pholadella radiata I believe Doesn't show up to well in the photo but this was a pretty nice Retispira leda I found I think this is Pleurodictyum americanum? Corals seem to be pretty uncommon here, and I don't have any Pleurodictyum in my collection so I was excited about this one. This last specimen for today left me confused, I found it exposed on the surface in pretty much the same condition it's in now. What confuses me is that the form of preservation looks very much like that seen in many lingulids, shiny black shell material. And the growth patterns also could fit that, but I've never seen any of this size or shape from DSR, so I was wondering if maybe it's some kind of bivalve, I'm really not sure with this one. I'll likely split this off into a different ID post with some other stuff later. I'm still sorting through and photographing the finds so I'll definitely update this topic more.
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Found near Alliance Airport, Highway 170, Denton County -
Found near Alliance Airport, Highway 170, Denton County -
Found near Alliance Airport, Highway 170, Denton County -
Found near Alliance Airport, Highway 170, Denton County -
I found these shoe shaped bivalves on highway roadcut near Justin, Tx. I think I've seen these before, but forgot the name though. Can anybody put a name to these bivalves? They were found on limestore layer above the grey clay layer. Fort Worth Limestone and Duck Creek Formation undivided. They measure around 6 1/2 inches by 3 1/2 inches/15.24cm x 8.89 cm.
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Hi. From: "Törökmező" (Nagymaros, Hungary) with video Thank You
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A reconstruction of the Mahantango Formation
Bringing Fossils to Life posted a topic in Paleo Re-creations
I just finished a reconstruction of the Mahantango ecosystem, based off of fossils I have found at corresponding sites. This certainly does not cover all species in this formation, but many of the most prominent (Sorry no Dipleura, haven't done that one yet). I recently learned about Striacoceras and re-identified many of my orthocerids as this obscure genus. Striacoceras is the brown orthocone in the background. I included two crinoid genera, (left to right) Ancyrocrinus and Botryocrinus. an Eldredgeops searches for prey. There are several Mucrospirifer brachiopods, some Orthonota bivalves, a couple ammonoids (Tornoceras and Agoniatites), and some Pleurodictyum coral. In the distance, a shoal of Bactrites drifts. This is one of my first entire ecosystems.
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Hi all, first post! Hope to post an intro soon..... I was recently walking a central new jersey beach with my family and found an unusual "clam". It looked more like a rock so I thought it might be fossilized? It looks compressed and is "hard as a rock". Any thoughts? Thanks for any replies!
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Hello, I am hoping for some input regarding some recent rock finds in an area recently exposed after heavy rains & flooding. I will probably split them up over a couple of posts. Appreciate any help in understanding these rocks. Location: Vestavia Hills, AL Paleozoic (from Ordovician to Pennsylvanian) Rock 1: Object just left of center- Bivalve? Trilobite? Rock 1: dark areas are moss - creating a bit of an optical illusion in the photo. Rock 1: close up of area on top right of rock 1, Shiny brown with white outline with some type of inclusion. Rock 1: close up of brown shiny area with white outline on front side. Resin? Rock 2: Weathered Bivalve? Rock 2: Different viewRock 2Rock 2: Backside Rock 3: could this be part of a trilobite?Rock 3Rock 3Rock 1: sorry I can’t figure out how to move photo to the rest of the photo group
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I'm chipping away at what I think is brush creek limestone to find what I think is Mooreoceras (first two pics) and Metacoceras. I have no idea what the last fossil is. All help is appreciated, thank you.
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Hello! I found this rock on the beach in Romania (Eastern Europe, Black Sea). It is about 12 cm long. It looks like pumice but it's actually heavy, doesn't feel like pumice at all. There are a lot of holes in it and when you look closely, you can see little seashells in the holes. In another hole, you can see something that looks like scales (You can see this in the last picture, but sometimes the order of the pictures gets messed up) Any idea what all these things could be? Also, is it a fossil or is it modern? Thank you!
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Decided to take a trip to Deep Springs Road in hopes of finding a complete Dipleura dekayi fossil. I have only ever explored the Devonian shales of Erie county, so the differences in the fossils was really refreshing. I have put some of my interesting specimens below. Also I did find a few pieces of trash that I picked up. Please help keep the site clean if you visit! Thank you for the help identifying these fossils that are new to me. 1. Found within my first 20 minutes at DSR, I never sniffed Dipleura again the rest of the day! 2. A type of gonatite maybe? 3. Not sure about this one. 4. Another one that is new to me 5. What I think to be great preservation on this bivalve 6. Saw a lot of gastropods, none of this size. I am guessing this is another bivalve.
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The Devonian period is known as "The Age of Fish", but could also be known as "The Age of Brachiopods." In the Early / Lower Devonian, brachiopods reached the height of their diversity towards its end in the Emsian. We see the ancestral groups occurring, lingulids, craniids, orthids, protorthids, pentamerids, rhynchonellids and strophomenids, as well as the later successful groups we have seen before such as atrypids, athyrids and orthotetids, plus the rise of spiriferids, spiriferinids and productids and the beginning of the terebratulids. By the end of the Devonian , several of these groups are extinct or severely reduced in importance and brachiopods never quite recover. Also, the Devonian is the last time we see trilobites with such variation, large sizes and numbers and orthocerids too are much more uncommon after the rise of the goniatites. The massive tabulate coral reefs also disappear after the Devonian. Fascinating period and I hope to share some of its wonders with you. Equally, a lot of this is rather new to me, so I would be very grateful for any assistance, corrections or further information on my specimens. Thank you. The Early Devonian epoch is split into three stages, so let's start with the first of those, the Lochkovian, that began about 419 mya and finished roughly 411 mya. I have been sent a nice selection of brachiopods from the Kalkberg Formation, Helderberg Group by the Mighty @Misha, mostly. But the kind gentleperson also sent me this fascinating little bryozoan hash : It is dominated by fenestellids, which is usually the case in the Devonian, but other orders sill occur. These ones, I think, are Fenestella, but there are so many species in the formation that I wont take a guess as to species : Not sure what this one is ;
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