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Showing results for tags 'pleistocene'.
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Dear brain trust . Recently found coastal So Georgia. Initially thought ice age turtle shell but missing the typical suture marks. It has a slight curve to the surface and has a smal convex protrusion on inner surface . Approximately 3/4 inch thick .
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During our explorations in search of fossils, we obviously favor sedimentary rocks; I invite you to follow me with my wife in search of fossils… in volcanic rocks! (only observation without sampling) In the center of the volcanic massif of Cantal (central France), we explored a not very accessible valley where outcrop deposits of breccias of dense pyroclastic flows, in search of fossil woods of Villafranchian age (upper Pleistocene). According to an old reference (conference , 1969) one can find: “sometimes tree trunks inclined in all directions and sometimes branches. They are black, it is charcoal, produced by combustion in the absence of oxygen. After their reduction in carbon, certain woods underwent a strong fumarolic activity with silicification in opal cristobalite, generally respecting the vegetal structures.” By anatomical study in microscopy, 5 genera have been identified: Cedroxylon, Piceoxylon, Cornoxylon, Fagoxylon, Ulmoxylon. They suggest a temperate or mountain type climate. The conservation of carbonized organic matter indicates that the rock emplacement temperature must have been relatively lower than at the volcanic magma exit point estimated at 900°C according to mineralogy. The pyroclastic flow therefore destroyed a forest by descending the slope of the volcano while cooling. Let us now see in some photos what we discovered with wonder: 2 fossiliferous sites, the first with only one vertical trunk in an overhanging cliff, the second with multiple trunks preserved or hollowed out and branches on the bank of the river (without signs of silicification on these 2 sites found about 300 meters apart). There must therefore still be other nearby sites, but the difficult access to the site probably keeps them out of sight.
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Scientists Revive 48,500-year-old Viruses From Siberian Permafrost
Oxytropidoceras posted a topic in Fossil News
Scientists Revived Ancient 'Zombie Viruses' Frozen For Eons in Siberia By David Nield, ScienceAlert, Novmber 25, 2022 The paper is: Alempic, J.M., Lartigue, A., Goncharov, A.E., Grosse, G., Strauss, J., Tikhonov, A.N., Fedorov, A.N., Poirot, O., Legendre, M., Santini, S. and Abergel, C., 2022. An update on eukaryotic viruses revived from ancient permafrost. bioRxiv. PDF of preprint of paper An earlier article is: Scientists Are Reawakening a 'Giant Virus' Frozen in The Siberian Wilderness By Peter Dockrill, ScienceAlert September 9, 2015 Yours, Paul H.- 3 replies
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Bison bison femur Science Museum of Minnesota
dbrake40 posted a topic in Partners in Paleontology - Member Contributions to Science
Bison bison. Wisconsin glaciation. Southern Minnesota, Brown County. Science Museum of Minnesota. Found in a riverbed in September of 2020 on a joint citizen scientist and Science Museum outing. I found this femur by noticing the femoral head sticking out of the river bottom. External Post:
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I’m posting this for a friend. He found it on the Brazos River in Southeast Texas. It seems too long and robust to be horse or bison. My initial thought is mammoth or mastodon tibia. Unfortunately, the distal and proximal ends are missing. Any other thoughts? I can get more photos from him if necessary. Thanks!
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Missoula Floods might have been 80 percent smaller than currently estimated
Oxytropidoceras posted a topic in Geology
Below is an article and papers about how the Missoula (Spokane) Floods might have been 80 percent smaller than currently estimated. Dzombak, R. (2022), Western U.S. “megafloods” might not have been so mega, Eos, 103, https://doi.org/10.1029/2022EO220069. Published on 3 February 2022. The papers are: Lehnigk, K.E. and Larsen, I.J., 2022. Pleistocene Megaflood Discharge in Grand Coulee, Channeled Scabland, USA. Journal of Geophysical Research: Earth Surface, 127(1), no. e2021JF006135. https://doi.org/10.1029/2021JF006135 David, S.R., Larsen, I.J. and Lamb, M.P., 2022. Narrower Paleocanyons Downsize Megafloods. Geophysical Research Letters, no. e2022GL097861. https://doi.org/10.1029/2022GL097861 Yours, Paul H.-
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Hello knowledgeable folks, Found this bovine tooth roots up in mud on the shoreline of the San Francisco Bay. Assumed it was modern cow because if the attached stylid and size but after some cleaning and testing- it appears to show signs mineralization. Is it possibly a bos genus fossil? I’d probably need to alert someone if that were the case…
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Hello, I came across this listed as a piece of Cro-Magnon skull, specifically the right parietal bone. Age seems to be Pleistocene, and it's said to be from a gravel pit in Poland. I was wondering if it looks correct and legitimate? It certainly looks like a skull bone of some sort. I did find this post that discussed another supposed Cro-Magnon bone (seems like it turned out not to be one), and there may be some legal/ethical concerns here as well. Perhaps I need to consult an anthropologist? Thanks.
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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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Hi all. These are eight bone fragments that I found a couple of years ago on the beach near the Zandmotor, the Netherlands. I realize that most (if not all) of these fragments probably are impossible to id, but any information would be great. Some additional pictures of fragment 1: Number two has a tiny whole (foramen) in it. Here is an extra photo of the top of the fragment: And some more pictures of fragment three: Number 6 at first sight appears to be part of some kind of disk (2 cm high). One side is very smooth/shiny. Thanks! Any information is appreciated! If you need additional pictures from other angles, let me know.
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I collect armadillo fossils. All of my fossils have been purchased and I have been able to identify most of them using the internet. The attached photos are from bones I purchased labeled Holmesina carpals. Both seem to be the same bone, one from holmesina septentrionalis and one from holmesina floridanus (my guess). They are both river finds from Northern Florida, USA. I have not been able to find a photo or diagram showing this bone. Does anyone have a photo or diagram showing this bones position in the skeleton. If these bones are not from the Holmesina genus, I would like to know that also.
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I found this horse molar (right tooth in the photo). It seems to have an isolated protocone as 3 toed horses do, but it is large (31mm left to right) and looks almost the same as most equuid teeth I have found. It is about 95 mm long- and does have a curve which you don't see in the photo. Large 3 toed horse or is it pathologic? @Shellseeker
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I had a couple of requests to show the shark teeth that I have found from Hawaii. I am pleased that folks are interested! All of the fossils were collected directly from the Mid- to Late- Pleistocene Waimanolo Formation. The formation is a mixture of deltaic/nearshore limestone and unconsolidated sands and silts. First, the shark material. There are a group of teeth and two vertebral centra. The shark teeth are in various stages of mineralization, with some completely phosphatized while others haven't altered much since they fell out of the shark's mouth. They appear to be from the blacktip reef shark, Carcharhinus melanopterus, a species currently common in Hawaiian waters. I also had 1 Scyliorhinid tooth, but misplaced it years ago. The vertebral centra are from a Carchariniform shark, probably the C. melanopterus, and seemingly unaltered, which is consistent with the turtle, bird, and some of the fish material that I collected. While some may consider these subfossils, I did recover them from the formation itself, which dates to 400,000 BP, which makes them fossils. The lack of mineralization may be due to the significant carbonate content and resultant high pH of the sediments.
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Looking for the following fossils (teeth related)
JorisVV posted a topic in Member-to-Member Fossil Trades
Hi everyone, I am trying to find the following stuff someone is willing to trade. - Mosasaurus partial jaws or matrix pieces, not repaired or restored. From Morocco. - Belgian Megalodon teeth - Mastodon tooth - Quality Spinosaurus teeth, larger ones. I got a lot to offer, mostly teeth and jaws from dinosaurs and ice age relater animals. -
Hi again everyone! I have a small fossil from a unit of lacustrine laminated silt from here in Saskatoon from the very late Pleistocene or early Holocene. The unit directly overlays a unit of till from the Wisconsinan glaciation. The unit contains carbonized plants stems, some of which are filled with wood boring beetle larva frass, diatoms, and burrows similar to Cruziana. In one of these hollowed-out burrows, I found this fossil, which is approximately 0.5 mm in length. It is composed of many extremely small carbonized plant fragments, all arranged horizontally from longest to shortest. I have no suggestions to explain how such an arrangement could occur through abiotic means, and the fossil bears a striking resemblance to caddisfly larva cases, many of which are composed of plant fragment arranged horizontally. I have attached some photos taken through a microscope lens on an iPhone. In hopes of accounting for the rough image quality, I have included numerous angles and degrees of brightness to help illuminate the arrangement of plant fragments. Any help confirming the caddisfly diagnosis or directing me from my incorrect guess to a correct one would be greatly appreciated!
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I am going to use this as a great place to showcase my personal collection of pliestocene age fossils! First I have a couple of cave hyena jaw sections!
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This vertebra was found at an estate sale in a box of rocks in Minnesota. It is partially mineralized, but I don't believe it is mineralized enough to be much older than Pleistocene. I realize it is fairly damaged but does anybody have reasonable guess as to what it might be from?
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Hello everyone. I'm sure this is easy for the more experienced, but I need help with this tooth from a Florida Riverbed in the USA. Thank you! Probably a mammal from the Pleistocene, is that correct? Thanks again.
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Pleistocene rib and vertebra found independently in Eastern Lesser Poland
Agonim posted a topic in Fossil ID
I was told the rib could belong to some Pleistocene horse or a young mammoth. There were also proposals that the vertebra belonged to the steppe bison or the woolly rhinoceros. They both were found in Eastern Lesser Poland. What do you think? Thanks in advance!
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Last weekend after a windy week I decided to go to the beach of Katwijk aan Zee (Netherlands) to see what fossils had washed up. It was a lovely walk along the North Sea. Mammal remains from the Pleistocene (part of the Neogene period) sometimes wash up on the Dutch coast. The bone material comes from layers that are eroded below the sea surface. In the Pleistocene the North Sea was a kind of tundra plain where various animals lived such as woolly mammoth and rhinoceros, the giant deer, eland, wild horses, red deer, musk oxen, steppe bison, cave bear, cave lion, a kind of hyena and the wolf. It is best to search between the somewhat coarser material washed up on the beach, especially after stormy weather like the week before I went looking. The find frequency on the coast is generally quite low. Unfortunately, this time too the yield turned out to be low. But still it was a fantastic afternoon, where I found a fossil Bovidae molar and some fossilized bryozoan colonies. Due to the stormy weather, a lot of material from the sea had been left behind on the beach. There were also many egg cases of rays (especially Raja brachyura) and sharks (Scyliorhinus stellaris). Also found some sea urchins, of the common species the little sea apple, also called common sea apple (Psammechinus miliaris). In addition, we enjoyed the typical 'Dutch skies' with beautiful clouds. All in all, a very pleasant afternoon, with a beautiful sunset. An afternoon to repeat.
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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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I need help to identify these fossils I found in the Nishnabotna River at Botna Bend park in Iowa. What animals and what bones they are, thank you.
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Here’s a chunk of crocogator I found on the Brazos River in SE Texas. It doesn’t look like the typical osteoderms that are found . I’m not sure if there’s enough here to identify a specific bone…
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Hello! Thank you all for taking the time to read this and (hopefully!) help me identify a very interesting find from Saskatoon! I was on a fossil hunting trip to a local exposure of Pleistocene glacial lake sediments in Saskatoon, and I took home a few samples of it to review later. While looking through one piece (the material is silt but breaks like a rock and is somewhat laminated), I saw this very strange shape. Attached are a few images, some simply in situ, others through a microscope. My apologies if the image quality is not ideal, I do not currently have any better equipment. There are a few images with my fingernail in frame to give you a sense of scale; this thing is very small. It is a kind of dome shape adorned with concentric rings of linked “nodes.” When looking at it, I knew it couldn’t be a pebble or partially buried rock. The thing it reminded me the most of was a Ptychodus tooth or other fish tooth plate, but the “dome” the nodes sit upon is penetrated open in one spot and is hollow. While I suppose this doesn’t rule tooth out, it does make me doubt that possibility. In addition, the nodes appear to resemble fish scales, especially ganoid scales, as some are rhomboidal in shape and all have the glassy coating those scales tend to have. There is also what appears to be a bone fragment near the dome. This is where my own suggestions end, I have no other ideas as to what this weird thing might be! Simple confirmation of the nodes as fish scales would probably satisfy me, but identification of them as ganoid would be even better. Please let me know if I can provide any extra clarification! Thank you!
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This is described as a feline canine from the Pleistocene of Africa, 7cm long. Does that seem reasonable or does the fossil seem modern? And if it's a fossil, can anyone identify what animal it came from? Thanks.
