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  1. bockryan

    Bivalvia

    From the album: Fossil Collection: DC Area and Beyond

    Bivalvia Deep Springs Road Quarry, NY Windom Formation Middle Devonian
  2. bockryan

    Bivalvia

    From the album: Fossil Collection: DC Area and Beyond

    Bivalvia Deep Springs Road Quarry, NY Windom Formation Middle Devonian
  3. Tidgy's Dad

    Adam's Early / Lower Devonian

    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 ;
  4. bockryan

    Bivalvia

    From the album: Fossil Collection: DC Area and Beyond

    Bivalvia Deep Springs Road Quarry, NY Windom Formation Middle Devonian
  5. bockryan

    Bivalvia

    From the album: Fossil Collection: DC Area and Beyond

    Bivalvia Deep Springs Road Quarry, NY Windom Formation Middle Devonian
  6. bockryan

    Bivalvia

    From the album: Fossil Collection: DC Area and Beyond

    Bivalvia Penn Dixie Fossil Park & Nature Preserve, NY Moscow Formation Middle Devonian
  7. bockryan

    Bivalvia

    From the album: Fossil Collection: DC Area and Beyond

    Bivalvia Capon Lake, WV Needmore Formation Middle Devonian
  8. Thomas.Dodson

    Some Green Mill Run Bivalves

    Hey all, a couple weeks ago I passed through Green Mill Run while traveling and had some time to go collecting. I've identified most things from the day but some bivalves I'm not sure of. As I understand it, most of these reworked Pliocene fossils come from the Yorktown Formation. Any help is appreciated. @MikeR #1. These bivalves are very common there but I can't seem to find a match in my references. #2. This Astarte? is quite different from the Astarte undulata that I found multiples of. #3. A small Phacoides maybe?? #4. Chesapecten jeffersonius I believe?
  9. Marco90

    Gryphaea arcuata

    From the album: My collection in progress

    Gryphaea arcuata Lamarck 1801 Location: Baudrecourt, Moselle, Grand Est, France Age: 199 - 190 Mya (Sinemurian, Early Jurassic) Measurements: 6,7 cm (diameter) Kingdom: Animalia Phylum: Mollusca Subphylum: Conchifera Class: Bivalvia Subclass: Pteriomorpha Order: Ostreida Family: Gryphaeidae
  10. Here's a little bivalve mollusc from Kowala, Poland, of Late Devonian (Famenian) age. Can anyone identify this to some more precise category than "bivalve mollusc"? This bivalve is about 1.6 cm wide.
  11. Marco90

    Myophorella clavellata

    From the album: My collection in progress

    Myophorella clavellata Parkinson, 1811 Location: Villers-sur-Mer, Normandy, France Age: 166-163 Mya (Callovian, Middle Jurassic) Measurements: 2,8x1,7 cm Kingdom: Animalia Phylum: Mollusca Subphylum: Conchifera Class: Bivalvia Subclass: Palaeoheterodonta Order: Trigoniida Family: Trigoniidae
  12. Marco90

    Gryphaea dilatata

    From the album: My collection in progress

    Gryphaea dilatata Sowerby, 1818 Location: Villers-sur-Mer, Normandy, France Age: 163-157 Mya (Oxfordian, Upper Jurassic) Measurements: 7x7x7 cm Kingdom: Animalia Phylum: Mollusca Subphylum: Conchifera Class: Bivalvia Subclass: Pteriomorpha Order: Ostreida Family: Gryphaeidae
  13. Over the weekend I tried some new Fox Hills and Cannonball Formation sites as well as returning to a couple old ones. Most of the new Fox Hills site was covered in abundant Ophiomorpha, a decapodian trace fossil very typical for parts of the Fox Hills. Abundant free weathered pieces of the burrows. There was a rather large Crassostrea subtrigonalis oyster bed on the property. A common fossil in the upper Fox Hills but I don't often see them in the abundance of this site (fragments in the thousands). All white/sharp edges you see are oysters. The Prickly Pears are now fruiting here. I only grabbed a handful of the most attractive individuals. The black/grey sheen on some is very pretty. An Anomia micronema was attached to the matrix on one as a bonus.
  14. On July 1st, 2021, I went for the first time to a public, personal site and was very pleased with the results of my fossil excursion. The locale consists of several exposed formations, namely the Liberty formation I was hunting in. In my region of southwestern Ohio, that's known to be one of the best fossil-hunting formations due to its remarkable preservation of particularly fragile Ordovician life, even when compared to the excellent fossil preservation quality of other formations in the area. The thirty-three degrees Celsius heat was rather hot by itself, and as the sun's rays made me question my latitude, the rainwater in the ground from the rain several hours prior was evaporating and creating a blanket of humidity-saturated air which prevented my body from transpiring. That was lovely. On top of that, this was above a very tall cutaway, so there was this constant updraft of hot, humid air coming from the bottom. Needless to say, conditions were extremely hot and humid. A thermos filled to the brim with refreshing, ice-cold cranberry-grape juice was a lifesaver, as otherwise I would have certainly overheated and becoming a sizzling omelet atop a frying pan of Ordovician fossils under that laser of a sun! With that being said, this is my first post regarding a fossil hunting trip in three years! While I have not been active on this forum, my paleontological trips have been ever more numerous. I remember you all, as I have been secretly watching in the meantime. I am a fossil sniper, after all. I should mention that I am an adult now, and I would prefer to have the "Youth Member" tag removed from my name. I plan to conduct a full survey of my entire collection before attending university, so look out for that. My collection is considerably sizeable now, having nine years of fossil-hunting under my belt. Here are my finds! Best & rarest for last, though all of them are incredible in their own right. Every edge of a square on the grid is half a centimeter. Assorted rugose corals. Gastropods. Branching bryozoan. The central branching bryozoan specimen in the prior figure under 200x microscope magnification. The skeletal cavity wherein individual zooids once resided 440 million years ago are evident, each 0.2 millimeters in diameter. The sheer level of detail in the preservation is as mind-blowing as this fossil's age. This photo is the product of using a computer to compile 140 photos focused at different layers of the specimen, as microscopes have a very narrow depth of field. I'm sure you all find as this fascinating as I do, so I compiled a photo for you guys. Assorted brachiopods, with two bivalves on the top left. I collected some superb Rafinesquina alternata, which don't tend to come with both fragile and thin halves intact, together, and out of the matrix. There were also some Leptaena that I did not photograph, but were lovely and undulating. The rest are common genera here, except for the fourth one from the right in the bottom row and the partial one of the same species immediately northwest of it, which I would like help identifying. Expect to see it soon on the ID forum. Assorted associated, straight-shelled nautiloid cephalopod septa. A larger example of associated, straight-shelled nautiloid cephalopod septa and a partial living chamber. Calcified straight-shelled nautiloid cephalopod. I always love the crystals on these. Flexicalymene meeki on the left and right. The left one is perfect, and is a very large example of what I generally find--my largest self-found complete trilobite, in fact--so I'm very happy with him. The right one is heavily weathered along its left and right, but the medial length of the pygidium, thorax, and cephalon are all present in some way, and the pleurae and glabella are resonant with Flexicalymene meeki, and I'm very happy with him, too. Adorable, curled little finger hugnuzzles of the ancient sea. Drum roll please! Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 This is a huge living chamber of a straight-shelled nautiloid cephalopod! Unlike the septal segments, the living chamber is very fragile with its thin, unsupported walls. This means it is very rarely preserved. Hence, in my near-decade of fossil hunting, I have never found a complete living chamber with its outer shell included until now. Let alone of this size! The only reason this one survived is because of the encrusting bryozoan that grew over its walls and thus strengthened them after the animal died--Figure 5 demonstrates the layers of the bryozoan well. This is also demonstrated on the side without bryozoan strengthening it in Figure 4, and how it simply crumpled due to the weight of sediments that accumulated on top of it after the animal died. Interestingly, one side has much more encrusting bryozoan than the other--this suggests that immediately after the animal died, part of the shell was resting on the silt of the ocean floor, preventing bryozoan from growing on it. The contrast in the thickness of walls of the living chamber & encrusting bryozoan growth on opposite sides of the fossil is evident between Figures 1 and 2, where in Figure 1 the walls of the living chamber are quite thin (one can tell from the thickness of the dark cracks on the bottom left), whereas in Figure 2 the walls are visibly significantly thicker (and layered from the encrusting bryozoan, upon zooming in). Deducing all of this is so cool. Additionally, Figure 3 zooms in on the bottom left fraction of the visible living chamber in Figure 2, and it actually shows the bryozoan growing around the edge of the living chamber walls and into the living chamber. This means that's the very outer rim of the living chamber! (In Figure 3, the white line is the living chamber wall, and the layers around it are the encrusting bryozoan. The light tan stone inside is just limestone.) On top of the sheer rarity of a fossilized living chamber, especially of this enormous size, having the edge of the living chamber preserved with enough detail to show the bryozoan that that grew into it over its rim—almost half a billion years ago—fascinates me. To finish this post off, there really is a mystery in every fossil. With the encrusting bryozoan only growing one side of the living chamber in the final specimen, and the subtle, hard-to-spot detail of how it grew around the rim and into the living chamber, it's like every fossil is a murder mystery (literally) and we have to be Sherlock Holmes and figure out details about how the animal died. Considering this was 440 million years ago, we're all some pretty hardcore forensic scientists!
  15. Hi, I am in search of Plate 8 from the following paper. Yes, the paper is published online at Biodiversity Heritage Library, but both Plate 8 and its accompanying "Explanation" (i.e., captions) page are unfortunately missing from the online edition. Please post a scan if you have easy access to Plate 8 from this paper, thanks. Driscoll, E. G. 1965. Dimyarian Pelecypods of the Mississippian Marshall Sandstone of Michigan. Palaeontographica Americana, No. 35.
  16. I recently came across a cool-looking piece with three different shells close together in a matrix, but despite my attempt to Google some pointers while I was pondering if I wanted it or not, I'm simply not trained up enough to determine if fossils are real. There's some parts that some articles were talking about that make me think it could be real, and others that make me think not so much... I have a feeling the matrix maybe isn't the original, but I'm hoping perhaps the shells themselves are still fossilized? But I'm really not sure -- anyways, the pictures I took are below. I hope they give you enough information/context to help me out, and that there aren't a whole bunch of superfluous details that I chose to focus on! Sorry for how big and in the way of the post they are, I'm still trying to figure out how to make posts look nicer ^^;
  17. Despite the shortest and most mild winter I've experienced in North Dakota (getting out this early is rare) it still feels like it has been an eternity since I got out. Thankfully I finally got a hold of enough landowners to warrant a trip to the Fox Hills Formation and celebrate the spring weather. While most of the later sites I visited were a bust the first site of the morning was excellent and contained fauna not often found in the Fox Hills Formation in North Dakota. 3 new species for me in fact. This site represents a brackish transition area of the top of the Fox Hills Formation. A view from the collecting hills. Note the water bodies are still frozen. Some farmers were burning stubble in the distance. One of the more significant exposures. Compared to the other 2 outcrops on the hills this one was poorly fossiliferous. Anomia micronema and Crassostrea subtrigonalis (glabra) litter the surface of the worn outcrops. The bedrock was basically an oyster bed hash of graywacke sandstone. This oyster laden sandstone isn't unusual but you usually don't find the additional fauna (see below). In-situ Crassostrea in one of the unworn exposures. Some of the nicest specimens. Moving clockwise from upper right is Pachymelania wyomingensis, Pachymelania insculpta, Corbicula cytheriformis, Crassostrea subtrigonalis, and Anomia micronema. Pardon the bad picture and for our international friends the coin is about 1.9 cm. I took this picture for the landowner since he was interested and I included a scale he'd know. I was also too tired to retake it with my metric scales. I plan to take better ones later. Nice sculpture to the Anomia. Most were not so iron colored. There are some additional things in pieces of the sandstone I brought back. I have an idea what this is but want to prep it to see for sure. This is larger, about 5 cm across. On the way back to the main roads I found a farmer in the middle of nowhere with a sense of humor. I also collected a couple smaller concretions of the more typical ammonite Fox Hills concretions from another site. I'm not expecting much based on their size but if there is anything interesting post preparation I'll post those as well.
  18. Thomas.Dodson

    Pennsylvanian Bivalve (Bond Formation)

    This bivalve came from an outcrop of the Bond Formation in Edgar County Illinois. Edit: After further research it seems to resemble something in the family Sanguinolitidae but without better references that is likely as far as I will get with it. Hopefully someone will have another idea or more experience with this strata and area.
  19. Mr.Baker

    Fossil

    Does anyone know if it’s possible for the meat; the edible part, of an oyster to be fossilised?
  20. These were collected on the TFF DSR trip last spring. I'm just now getting around to processing the fossils. I'll start with the bivalvia, because they were the primary reason I wanted to go to DSR (and to meet fellow forum members, of course!). My phone editor doesn't have italics, so the names on the photos are not italicized. Scale is in mm. If you see a specimen that is misidentified, please let me know. I have also included some for which I don't yet have a confident ID. Please chime in if you know them. Not sure on this one. Shaped like Prothyris but has radial striae. Not sure on this one... Paleoneilo. Which species? Not sure... Not sure... Not sure... Sharp angle at posterior end is throwing me off...
  21. Peat Burns

    Briggs TFF Report

    This is a belated report from the Briggs TFF gathering last spring. Here are some photos of TFF'ers working the site: Here are my finds (not in phylogenetic order). Scale in mm throughout. I guess I'll start with one of my bucket listers, a large goniatite: Next, the trilobotes: And "those other arthropods": Now the gastropods: Other Mollusca: Crinoidea: Seedless vascular plant bits: I don't usually collect "hash plates" but such accumulations don't seem very common at these sites, so I picked up this nice one.
  22. D.N.FossilmanLithuania

    Two jurassic bivalves from Western Lithuania

    Good morning everyone! I have some bivalves found in dark marl erratic boulders of Klaipeda district (western Lithuania) and I hardly can find information about two specimens I show here in the photos. The first looks like pholadomyoid (oblong and with radial ridges) and the other looks like arcid or cardiid (it has rays in the lower edge of shell). Please help to identify genera of these two bivalves if you could. Best Regards Domas
  23. ozgur70

    Mesozoic bivalvia

    Turkey, Karaman Late mesozoic.
  24. ozgur70

    Miosen bivalvia

    A small one. 15 mm. The bivalvia fauna of Miosen in Karaman basin is really amazing. Turkey, Karaman.
  25. ozgur70

    miosen bivalvia3

    Turkey, Karaman, 8 mm
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