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Showing results for tags 'bivalves'.
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I was able to take another trip to the Leighton Formation today! It's been a while since I've been able to visit (months and months), but I've finally been able to. Unfortunately, during the winter the place is completely covered in snow and ice. Not really the best collecting conditions... My last trip there was in August of last year, and the spring has been very busy. Today it was time. It was supposed to be overcast with a chance of rain, but it came out sunny and bright. Absolutely beautiful day out. The collecting was very good. I unfortunately forgot to take a picture of the site. I was working in the same spot as last time, and at another outcrop a little farther down the shoreline. Place hasn't changed much, still as minuscule and weathered as ever. I had a better idea where to look though. Last time, I collected a lot, but I was mainly working in layers where the fossils were very evident. These layers contained a plethora of brachiopods, ostracods, tentaculites and other invertebrates - plus my first conodont. This time, though, I was going to try something a little different. The layers between the extremely fossiliferous layers had finer sediments, and generally seemed to keep the specimens intact better. I chose to mainly work in what I now call the "Chonetes layer". It's the only layer in these outcrops that contain Chonetes bastini brachiopods. The layer doesn't shatter as much as the other shale, so the pieces come out without a lot of cracking. It was also the same place that I found a nice trilo-bit, and I was hoping it would pay off. It did... The best finds of the day went to the trilobite cephalons. I found two Acaste cf. zerinae sp. - mostly intact, but an eye cracked off on the first, and both on the second. I was (luckily) able to find them, and I intend to glue them back on. At least the external molds are completely intact. In all of the following pictures, internal molds come first, external molds second. Cephalon #1, the one-eyed wonder. Cephalon #2 - missing both of the eyes. Sad, it would have been so nice too... Then came the pygidia - four of them! I believe that they are all the same species as the cephalons - A. zerinae - but I could be wrong. I'm sure the trilo-experts here can help me with that. Pygidium #1, the nicest one. Pygidium #2 - this little guy got a bit beat up when the rock split. Pygidium #3 - little bugger needs to be prepped a bit. Pygidium #4 - the internal mold of this cracked in half - and it's missing a piece. This one's a neat little trace fossil. It looks like an infilled burrow to me, but I'll set up a separate thread for that - with better pictures. And this very odd little guy. Another one I'll have to take better pictures on, and as soon as the matrix is pared down a bit I will scrutinize it under a microscope. It's not very evident, but it feathers out at the right end. It could be mineral staining or something, but I'm not sure yet. Then the stuff I couldn't bear to leave behind. I was trying to keep my collecting to new stuff, but some of them just sneaked in there... I feel like we've all experienced this before. Orbiculoidea sp. brachiopod. Lingula sp. brachiopod. Leiopteria rubra bivalve. It was a pretty good day. On top of these finds, I brought back some promising shale pieces to look for micro-fossils in - and a few more interesting unknowns. But that's for another time.. Thanks for reading!
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Found some nice oysters, bivalves and possibly brachiopod (?) in Cierbo Sandstone (Miocene) at about 1800 ft. elevation. The largest oyster measured near 7 inches long and weighed 4 lbs!
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Anyone know the species or genus of these?
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Goniophora from Geer Road Quarry, Madison County, N.Y.
Jeffrey P posted a gallery image in Member Collections
From the album: Middle Devonian
Goniophora hamiltonensis Paleoheterodont Bivalve Middle Devonian Upper Ludlowville Formation Hamilton Group Geer Road Quarry Eaton, N.Y. -
Detail of assemblage - small bivalves & brachiopods
Rogue Embryo posted a gallery image in Member Collections
From the album: Camille's fossils - Georgian Bay Formation
Field collection by Camille Martin, April 4, 2022© Camille Martin
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Detail of assemblage - small bivalves & brachiopods
Rogue Embryo posted a gallery image in Member Collections
From the album: Camille's fossils - Georgian Bay Formation
Field collection by Camille Martin, April 4, 2022© Camille Martin
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Detail of assemblage - small bivalves & brachiopods
Rogue Embryo posted a gallery image in Member Collections
From the album: Camille's fossils - Georgian Bay Formation
Field collection by Camille Martin, April 4, 2022© Camille Martin
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Detail of assemblage - small bivalves & brachiopods
Rogue Embryo posted a gallery image in Member Collections
From the album: Camille's fossils - Georgian Bay Formation
Field collection by Camille Martin, April 4, 2022© Camille Martin
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From the album: Camille's fossils - Georgian Bay Formation
Field collection by Camille Martin, April 4, 2022© Camille Martin
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Years ago I picked up these fossils in southern Indiana. I began looking them over again recently. I'll explain what I understand about them. Matrix: Ironstone concretions Classified: Carboniferous? Location: Millsport, Jackson County, IN; Muscatatuck River bed I found these fossils below the Rte. 135 bridge over the Muscatatuck River, which runs at the base of a large hill south of the river. As I recall, the rockface of the hill is gray shale. I believe the concretions are washing out of the shale and tumbling into the river. The river runs on or near the ends of glacier worn plains. The glaciers less affected the hilly region to the south. Here is the fossil trace that has always confused me: In the same matrix occurs the following bivalves of various sizes: I've added three pictures of the large bivalve because it is unusually tall compared to most bivalves I've seen. There are fine ribs running from the dorsal to the ventral ends. The concentric ribs are like large wrinkles. Within the concretion that held the large bivalve, I found mirror images of a flattened tube shape. The mirrored look reminds me of plant fossils in Carboniferous rock closer to Terre Haute, IN. I'm grateful for any suggestions or references. Thank you.
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Swarthmore Fossil Hunting Club Visits the Montour Fossil Pit
cabes234 posted a topic in Fossil Hunting Trips
Hello all, yesterday I led a trip to the Montour Fossil Pit with several other Swarthmore students as one last fun thing to do before final season begins and everyone gets consumed by work. We had 5 people in total including myself there and we had quite a good time. Currently I am in the process of receiving images of everyone’s finds and several students want their stuff ID’d so I have a post for that under the proper section to get their questions answered but I thought everyone would enjoy a more general trip-report style post, I will update this post with other people’s finds as they come in. Here are my finds: A coral stem A partial bivalve with both sides preserved. Mediospirifer brachiopod What appears to be a spirifer brachiopod with all the folds well preserved. 2 Chonetes brachiopods, one with a crinoid stem fossil as a bonus. And finally my favorite find of the day, a very very small Greenops pygidium, which was preserved in great detail. Hope you all enjoy these! Caleb
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Clam fossils help calibrate phylogenic calculations
Oxytropidoceras posted a topic in Fossil News
Clam fossils help scientists find errors in evolutionary tree calculations by Louise Lerner, University of Chicago, PhysOrg, Decemebr 2, 2021 Tha paywalled paper is: Nicholas M. A. Crouch et al, Calibrating phylogenies assuming bifurcation or budding alters inferred macroevolutionary dynamics in a densely sampled phylogeny of bivalve families, Proceedings of the Royal Society B: Biological Sciences (2021). DOI: 10.1098/rspb.2021.2178 Yours, Paul H. -
Colorful Cretaceous shells and multiple Inoceramus species (I think) please help with Id's
Lone Hunter posted a topic in Fossil ID
Had a blast last week busting up marl in the creek with Rockwood's help . I was amazed to find a chunky plate filled with beautiful shells in addition to gobs of gastropods in the area and Gryphea. Got thrown off trying to ID by color duh, finally shape of striped ones clicked, flat sides, Inoceramus sp.? The tiny brown one Inoceramus cuvieri? And the little round ones pinnaeformis? The tip is broke off one but they are all the same. Limestone Inoceramus maybe labiatus or sp.? So not sure about Gryphea, 2 are in piece with the big shells and one of them is round, the other right underneath it, last is the big black/silver with both valves. It's hard for me to distinguish some things without finding a good match for comparison. Really enjoyed prepping these and wondering how uncommon it is to find this good preservation? Appreciate any input! Hope pics come out in order.
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I recently took a trip to my hometown, San Antonio, Texas, to visit family whom I hadn't seen since before the pandemic. Ever since I caught the fossil bug last year in Maryland, I've been itching to make it back to Texas to explore. This trip's purpose was to catch up with family, but to do so, naturally, I had to catch them up on my new hobby! Two places were easy to add to my itinerary -- both my Mom and Dad have seasonal creeks in their neighborhoods, which I was able to walk. The creeks in my Mom's neighborhood expose Albian rocks from the Edwards Group. This creek system is pretty extensive, though in my experience, unfortunately, it wasn't very fossiliferous. The best fossil I found was the small Ilymatogyra arietina below, which suggests that there's a Del Rio Formation (Cenomanian) exposure somewhere in this area as well. The other fossils in the creek were infrequently found and of lower quality. I didn't have much luck in my Dad's neighborhood either. The rocks here are from the Austin Chalk, which is Coniacian-Campanian. I found only small bits of shell and some heavily eroded shell conglomerates. I had much better luck visiting a Glen Rose Formation (Albian) site with my mother and sister that required more travel, though wasn't too far away. Here we were able to collect fossil echinoids, including some nice Leptosalenia texana, bivalves, gastropods, algal balls, and foraminifera. We enjoyed it so much that we went back a second time. This site had quite a few modern invertebrates too! At some point, I will plan to take a bigger Texas fossil tour, but I needed to stick closer to San Antonio this time around. With that constraint, I can't thank @Uncle Siphuncle enough for your amazing TFF guide to San Antonio fossils -- I learned so much from your post about the rocks where I used to live!
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These fossils were purchased by me from a friend who had received them 30yrs ago. In the box they were in was a paper that read "Miocene, Calvert Cliffs, MD. Though some have argued that they are Florida fossils...I found id's for all but a couple from: "Vokes, H.E., 1957, Miocene fossils of Maryland: Maryland Geological Survey Bulletin 20, 85 p". I was wondering if anyone could id the two left...the single fossil photos? Thanks Greg
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From the album: Late Jurassic bivalves of European Russia
Moscow, Fili park, Volgian, Nikitini zone -
From the album: Late Jurassic bivalves of European Russia
Upper Oxfordian, Moscow Oblast, Broniitsy -
Bivalve Internal Molds from the Vincentown Formation
Jeffrey P posted a gallery image in Member Collections
From the album: Tertiary
Bivalve Internal Molds (One on the left appears to be Cucullaea) Largest just over 1 inch Paleocene Vincentown Formation Rancocas Creek Vincentown, N.J.-
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Possible Trilobite and Bivalve Fossils found by side of road in Sharon CT.
cabes234 posted a topic in Fossil ID
Two days ago some workmen laid some stone by the side of a road near a pond in Sharon CT and I found two fossils one that appears to be the back of a Trilobite or a Chiton and another that looks to me like scallops or some other bivalve (I know that scallops and trilobites never existed at the same time). Does anyone have any ideas as to what these could be. Also I know this rock is not from where I found it, it was probably sourced from a local quarry so I would have to check with the highway department of Sharon to figure out where these come from.
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The fossils were found in the 70s in northern Sardinia during the excavations for the construction of a road. I do not know the exact location, but I know that it is the north of Sardinia. The coin is 1 euro (it's similar in size to an American quarter.) What could it be? Thanks in advance
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Another trip to 'gold mine', huge Gryphea w/shell, tiny Echinoids, tooth & more
Lone Hunter posted a topic in Fossil ID
Went back to my little gold mine today and was again amazed by the variety of things found. Previously I thought I was in Eagle Ford, but it is in Woodbine, with ravine that cuts down to Grayson as was explained to me in first post from this local. Everything was dried out except bottom of ravine, from the looks of things I think a natural spring is involved. So found some more Mariella ammonites, one with part of a scallop maybe?, and a Hemiaster, another Texigryphaea with some shell, I believe a little bacculite, an Echnodus tooth?, unknown clams, a Trigonia, and crawling on hands and knees on top sandy area found these tiny Echinoids which are so small having a hard time making ID, can't believe they even made it home intact.
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Hello. This is my next mystery. It's been looked at in the precleaned state and dismissed as a cool rock. I beg, to differ and need your thoughts. My reasons for thinking this is a fossil/ fossil impression are as follows: 1) As I cleaned, the left edge (see ladt pick with knife), began to show evidence this is on top of the matrix, not part of it. Likely matrix of shale-chert so please, take that into consideration. Extremely odd charts in my area 2) Looking at the picture with my finger, examine that small white portion. That appears totally different from the rest. 3) I do see a horizontal pattern matching the only other buchia so. I could find online. I've included that picture as well - All copyright remains with the Dr. Richard Paselt per the tag seen in the photo. Thank you for your time. If this is buchia, then it's a glacial find and came to the East Tennessee, Douglas Lake area of the French Broad river, Dandridge Docks, Dandridge, TN by water. That's where I found it. This is supposedly Mid-Ordovician in this area. Tennessee is an extraordinary place and it's State Fossil is a Jurrasic period one.
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Found a little gold mine of Turrilites, Echinoids and bivalves
Lone Hunter posted a topic in Fossil ID
I've driven by this field for years with a big ravine in the distance and decided to check it out since it wasn't fenced or posted and glad I did. The ravine was a good 30-40 yards long, probably 10ft+ at deep end and around 5ft wide, as I got closer the dirt changed to grey clay mud with little vegetation, the surface was sandy and rocky. First thing I saw was the large Echinoid, then peices of what I thought were ammonites until I found a more intact one, then I thought Turritella but didn't quite fit. Had a heck of a time trying to ID them and finally ran across Turrilites, I think that's what they are. I went in shallow end of ravine to grab a few things and ended up with 10lbs of mud stuck to my feet so anything else was retrieved by reaching over edge of ravine. Couldn't tell what half of it was until I got home and washed them off. So here goes my ID efforts, Hemiaster echinoids, a Texigryphaea, the group with clam, and possibly a Trigonia, and what looks like deformed echinoid ? Not sure about the last 2 tiny ones, some kind of bivalves? This is the most fossils I've found in one spot and I'm unfamiliar with some so appreciate any help!
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This little rock is from Eagle Ford, since it was cracked I broke it open to be surprised by all the fossils in it and that I saw shiny things with color. Definitely not what I'm used to seeing! I assuming most of these have original shell, there are gastropods that are different colors, and also bivalves with different color, different sub order? Several heteromorph ammonites I think, and some kind of worm. Curious what the shiny multicolored area is, a couple unknowns, dendrite I think, and last one I'm not sure about, scaphite maybe? Appreciate any help!
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A couple of weeks ago I was in Southern Florida with my wife and my sons family for 8 days. My wife, my 7 year old grandson and your’s truly. During this time I was able to get out and collect fossil Pliocene-Pleistocene shells from the Caloosahatchee Formation. Collecting fossil shells is one of my favorite fossils to collect and I love it when I find complete examples. I have been to the Peace River a couple times, and even stopped there on the way home to take a look at it, it was very shallow, there was a group of people sifting, but I did not partake. I do enjoy collecting fossils from the Peace River, but I would rather collect fossil shells. During this trip I did collect hundreds of fossil shells, but I am only posting a few species of complete fossil bivalves, some of these have predatory drill holes in them. @MikeR hopefully you can let me know how my identification is on the following shells, I tend to mess these up. Eucrassatella speciosa Chione elevata Arcinella cornuta Plicatula marginata Carditamera floridana Same as above- Noetia ponderosa macnelli Lucina pensylyancia Solecurtus cumingianus Arca wagneriana Dosinia elegans
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