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Found 54 results

  1. Is this rock considered a fossil

    So is this rock considered a trace fossil or a fossil at all? I am asking because I have seen similar rocks identified as fossils. Thanks.
  2. Help Me Out

    After a little research I think this is coprolite. Rock on one side and something that resembles poop on the other side. See next post for reverse side. Size is 1 1/4 inch by 3/4 inch by 1/4 inch
  3. I just came back from a surveying trip with some specialists from the museum this weekend, and naturally on the day after they left I happened to come across this oddball... It's really nothing like I've ever seen in the area before. The fossil itself is a piece of fragile lignitic wood inside a sandstone concretion, found in a thin layer of the late cretaceous marine Bearpaw formation associated with trace burrow fossils, and known to be deposited in a near-shore deltaic environment. Very well preserved, fragile lignitic wood is common, as well as other trace burrow fossils (you can see some in the concretion itself), which leads me to believe that these are infilled burrows of some kind (termites?). But I've never seen burrows in fossil wood that look like this, never mind in mud or any other substrate. They look to be too closely clustered together to be burrows, as in most substrates this would cause the walls between them to collapse. I know the chances are astronomically low, and that this almost definitely isn't the case, but this looks the most to me like some sort of fungal colony more than anything. Could it be a trace fossil of some kind of fungus or plant? I only have these photos from the field currently, as the specimen is currently jacketed, but I might have a chance to get some better photos either tomorrow or sometime later this week. (PS, I still find myself unable to upload any images to the forum. I get an error message that says, "The page you are trying to access is not available to guests, but may be available if you sign in.") View of concretion Note the lignitic wood still clinging to the top and bottom of the hollow once presumably filled by it. Left close-up Right close-up Some of the smaller "nodules"
  4. Strange Steinkern

    This is a steinkern of a fossil clam that I had purchased, the shell itself fell apart almost immediately and this was left. I just want to confirm that the things on the surface of it are some kinds of trace burrows from worms, I am not really sure but that is what they look like to me. Thank you all.
  5. Track traces?

    Found this slab at Jalama Beach, California on Saturday. It was quite different from all other blank pieces we found. Monterey Shale Formation, Miocene. Some of these prints look like bird tracks to me. Any insights?
  6. Kilkee Ireland

    Looking for help identifying what I believe are trace fossil found on the cliffs in Kilkee Ireland. The area is Upper Carboniferous if I am reading the map correctly. Any help would be appreciated.
  7. Scalarituba

    Nice example of Scalarituba found yesterday as float in NE Ohio. I would like others to confirm my identification. Thank you!
  8. I have heard that it's not uncommon to find examples of the ammonite placenticeras meeki with evidence of supposed mosasaur predation marks. A certain example of mine has since stood out as a possible contender. This example comes from deposits of the late Campanian Bearpaw Formation, a unit that is already well known for its good preservation of late Cretaceous molluscs, including placenticeras meeki with the supposed predation marks. I know that there are competing theories about the origin of these marks, including abrasion by limpets or other gastropods, so I'm curious about whether any of you are in agreement that this conspicuous pattern is evidence that this particular placenticeras was chomped by a mosasaur. A note about the specimen - I somewhat foolishly decided that a fine grain sandpaper was the solution for getting rid of the stubborn bits of sandstone matrix and pyrite that clung to the nacre, so most of the surface, including the rims of the matrix filling the puncture holes, is slightly polished. Also unfortunate is the fact that this ammonite, on account of most of the internal chambers being completely hollow, smashed into hundreds of little pieces once the concretion containing it was split. Fitting these fragments back together is essentially impossible, and I'm regretful that the specimen was ruined slightly by not being extracted carefully enough, but thankfully there's still a significant amount of it that's still intact. If anything, it seems to be telling that the only part of the fossil that isn't hollow (and therefore more durable) is where the puncture holes are, given that these holes would have allowed water and sediment to enter the chambers they had breached. The chambers which did not fill with matrix, on the other hand, could not handle the stress of the concretion being split, and shattered. Anyway, the first photo here shows the first two holes. These are on the left side of the ammonite. Note that the nacre around the punctures is cracked, where otherwise it is smooth and unblemished. The right side, showing the third puncture hole. It is difficult to tell in the photo, but this hole is depressed slightly into the ammonite. The bit near the end of the tape measure could also be a hole, but it's difficult to tell with so much pyrite encrusting it. Finally, a front-facing view. I've added arrows to approximate the location of the holes on either side. Note the preservation of the nacre of the septum, and how much of it is still covered by pyrite. Note that the other end of the fossil has no obvious septa, leading me to believe that this fragment is from near the body chamber. So, thoughts? I know that the origin of this type of trace fossil is still somewhat contested in paleontology, and I'm really curious about what the forum's consensus will be.
  9. Hi all, I have a pair of dino tracks. The left one is a Grallator sp. from the Connecticut River Valley. The right one is an Anomoepus scambus from Granby, Massachusetts. I've been trying to figure out their formation. I know they come from the Newark Supergroup. I would like to narrow it down. Do they come from the Portland Formation?
  10. Controversial fossils suggest life began to move 2.1 billion years ago. New Scientist, February 11, 2019 https://www.newscientist.com/article/2193557-controversial-fossils-suggest-life-began-to-move-2-1-billion-years-ago/ The paper is: Abderrazak El Albani, M. Gabriela Mangano, Luis A. Buatois, Stefan Bengtson, Armelle Riboulleau, Andrey Bekker, Kurt Konhauser, Timothy Lyons, Claire Rollion-Bard, Olabode Bankole, Stellina Gwenaelle Lekele Baghekema, Alain Meunier, Alain Trentesaux, Arnaud Mazurier, Jeremie Aubineau, Claude Laforest, Claude Fontaine, Philippe Recourt, Ernest Chi Fru, Roberto Macchiarelli, Jean Yves Reynaud, François Gauthier-Lafaye, and Donald E. Canfield, 2019, Organism motility in an oxygenated shallow-marine environment 2.1 billion years ago PNAS published ahead of print February 11, 2019 https://doi.org/10.1073/pnas.1815721116 https://www.pnas.org/content/early/2019/02/05/1815721116 Yours, Paul H.
  11. Trace fossil? Bivalve borings?

    Okay, I had originally just thought this specimen was a 'mother nature playing games' kind of rock when I was out exploring on a day that turned out to be filled with lots of trace fossils. After some online research for Ordovician trace fossils I came across some Flickr photos for Petroxestes pera, bivalve borings, that were once called 'turkey tracks'. The particular photo panel labeled, Petroxestes pera bivalve borings on limestone hardground (Turkey Track Layer, Waynesville Formation, Upper Ordovician; Flat Fork Arm of Caesar Creek Lake, Warren County, Ohio, USA) , looks quite similar to the strange marks I found in this upper Ordovician formation here in southern NM. Any trace fossil turkey track experts willing to comment? Thank you in advance, Kato
  12. Found in my yard in Corpus Christi, TX.

    Was digging up a part of the yard with lots of chert scrapers we found and thought I saw something. Mud was wet so wasn't sure. After it dried I found these inside. Is this something or am Crazy?
  13. neo-ichnology!

    mardentomolichevo.1558-5646.2012.01743.x.pdf REANALYSIS AND EXPERIMENTAL EVIDENCEINDICATE THAT THE EARLIEST TRACE FOSSIL OF A WINGED INSECT WAS A SURFACE-SKIMMING NEOPTERAN James H. Marden EVOLUTION/jan.2013 a re-examination of conclusions reached in the item below knechthexapodlagerstatt2b1cf335.pdf Late Carboniferous paleoichnology reveals the oldest full-body impression of a flying insect Richard J. Knecht, Michael S. Engel, and Jacob S. Benner PNAS,vol.108/16,2011
  14. Unknown trace fossil burrow

    Here is a fossil shell I found on a fairly recent trip to big Brook nj, towards the right there is a burrow that looks very straight and in the end of one some kind of dark conical figure is located, not sure what it is, any help would be appreciated. Thank you.
  15. Large cone/bowl shaped trace fossils.

    Cottowood Mbr, Beattie Fm, Council Grove group, Permian. Western Greenwood County, Flint Hills, Kansas. I've found 6 of these in only in this one place. They are most likely the interior molds of the actual trace. They were discovered over a period of several months. They were found as tumbled out, not in situ. I'm inferring what's top and bottom due to some obvious features and basic physics. Some retain what appears to be an original edge around the top. The top diameters range in size from 5" to 10+", with heights from 2" to 6". These were found in an area disturbed by oilfield work where it looks bulldozed out for some purpose. Geologically, the area may have intermittently been shallow or shoreline. I've done an amateur's inventory of fossils in the immediate area and found highest numbers are of very! small bivalves.
  16. Hello everyone. I'm a geologist/stratigraphist and I've been studying Missão Velha Formation (Araripe Basin, Brazil Jurassic-Cretaceous) for a couple of years. We found some structures that seem to be trace fossils, but as geologists, we assume ourselves to be slightly ignorant in ecologic behavior of species. The MV Formation are corsed sandstones, well stratified, with few purple siltic-sandstone levels with ped structures. These trace fossils I'll be presenting next resemble the top of one of these siltic-sandstone levels. They are tridimensional and cilindric, with an spheric edge on the bottom and the top is not well seen. It have sort of a stratification, like it was many piled up rings.
  17. Hello everyone, I am in desperate need of help with a huge debate I have been having with a friend over fossils preserved in ironstone concretions. From some of what I had read to some advice from other members I it possible to find vertebrate bone among shells and other mollusks preserved in an ironstone concretion. Whether it leaves a trace of the organism, morphs the organic material into the structure of the iron concretion through the decomposition with preserving, or whatever else it may be it seems to be possible. So recently I have hunted a place known to have recorded marine cretaceous shell and other mollusk found in ironstone concretion as well as cretaceous plants in shale, it seems like not to vast of enough study has been done there only from what I know, but since no vertebrate material had yet been discovered there though there can maybe be the possibility. I found these two particularly distinct pieces in iron concretions that exactly mimic the scute structure of soft shell turtle and croc in my opinion, I know how iron concretions are famous for leaving psuedofossils and such but these two pieces look way to exact and since its possible for shells and mollusks to preserve why not scutes? So I am here looking to end this debate, I'm looking for your opinion, can these be labeled as fossils, traces, etc? Or are these among some of the world's best iron concretions and nothing more. Your input especially if you are very experience in this subject would be tremendously appreciated.
  18. Good afternoon everybody! During a fieldtrip in Silesia (Poland) last year I visited a rather large spoiltip looking for plant fossils. The spoils left behind by the mining company indicate they still use (or used) the old method to separate the coal from the surrounding debris, allowing the coal to be 'baked' (e. g. the presence of pyrite that turns into sulphuric acid -h2so4- under the influence of wind and rain, ...) something typical for the majority of spoiltips I visited in Western Europe. Unfortunately I have no detailed geological data on the age of the debris in the spoiltip but there is no doubt this is Silesian (upper Carboniferous) in age. I even tend to think this is Westphalian in age based on the fossils found, but let's keep it to upper Carboniferous to be sure. I found several species of Lepidodendron, some Eusphenopterids, both Stigmaria ficoides and S. stellata, etc... And this never-seen-before 'thing'. My initial thought was that this could be some sort stem/branch but, in my 20 years of collecting Paleozoic plants, I have never seen the repetative triangular pattern that covers the branch (or tube if you like). Perhaps this could be some sort of tracefossil? Since my ichnofossil-knowledge is extremely limited someone here can help me out? The height of the 'tubes' varies between 2 and 3mm. Have a nice day! Sven
  19. Hi all, I recently have found trace fossils called Rhizocorallium. It is possibly from the feeding burrows of a Crustacean, annelid type creature. Found in the ~90 million year old marine shallow seas of the Cretaceous period contact between the Austin chalk and Eagleford shale formations. These are very small ones. From the Martin Marietta cement quarry phosphate layer siftings.
  20. Small Footprint

    From the album FreeRuin's Finds

    Either a small footprint or a partial one I believe it to be a Grallator due to its shape and size. Picked it up while hiking. Hartford Basin Portland Formation Massachusetts
  21. Enigmatic Ammonite Eggs (?)

    Hey all: For your consideration and expertise, an ammonite partial collected by the poster's parent has some interesting features. I don't know the exact formation of origin, but within the Rio Puerco river valley known to be Cretaceous period. I'm posting the best images I have at the moment, which, in addition to the partial with the scale cube (lower ammonite partial), are my attempts at using a smart phone to shoot down the dissection scope tube with the ocular removed...It's the best I can do at the moment. In question are the egg like features you can see on the partial. Most ammo eggs I have seen are spherical and not bacilli-like. The black dots are lichens that are commonly found in area rocks, usually in small crevices that trap dew. Thoughts?
  22. Trace Fossil Help

    Found these beauties in my neighborhood on a sidewalk I've walked over for about 15 years... Any ichnologists out there? I'm thinking Cosmoraphe, but I'm a bit out of my depth.
  23. Hi all, I was wondering: would the steinkern of for example a Turritella be considered a fossil or an ichnofossil? Because in fact, the shell itself didn’t become a fossil, and what we are looking at is just sediment that filled in the shell and then solidified. But then again I’ve never heard of a steinkern being referred as an ichnofossil... So what do you guys think: really a fossil, or just a trace fossil? I am curious to see everyone’s opinion Best regards, Max
  24. Possibly bioturbated sandstone?

    I've been adventuring my family property in north-western Pottawatomie county, Oklahoma, for 15 years or so and I've always thought all this sandstone was kinda boring - there didn't seem to be any obvious strata, or differences in composition and no fossils. On Christmas day, however, I went out on the family property to do a bit of photogrammetry of the sandstone outcrops on the property and I stumbled upon a very interesting pattern in the sandstone: I have been told that it looks like bioturbated sandstone, and it certainly looks like some kind of biological pattern. This sandstone belongs to the garber formation in central Oklahoma, and is Permian in age. This is the only place I've seen such a pattern anywhere around here. Is anyone familiar with the garber sandstone or perhaps with similar formations/trace fossils?
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