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Found 1,137 results

  1. Trilobite thorax ?

    Hello folks ! Tis the season to go digging. fa la la la ................. I haven't posted for a spell, but have checked in on occasion. There is a small area of my yard where grass won't grow, just weeds with bare ground in between. This item was lying on the surface. I've ridden the mower over it for 26 years now and finally looked down at the right moment. Looks like it might be the thorax of a trilobite, but am not sure. Is it recognizable to any of you ? Thanks.
  2. Hello everyone, I will be going out for the first time to collect the lower Devonian Helderberg Group. I am wondering about which chisel and geology hammer are most appropriate for splitting the rock. Any help is appreciated. Joseph
  3. From the album Middle Devonian

    Aulocystis dichotoma (branching tabulate coral) Middle Devonian Moscow Formation Windom Shale Hamilton Group Deep Springs Road Quarry Lebanon, N.Y. This tiny tabulate coral- approx. 2 inches wide, was on a large slab which Shamalama Dave carried for me to my parked car. Unfortunately split when I was trying to cut down the size of the slab, but should be mostly repairable.
  4. From the album Lower Devonian

    Cryptonella exima (Terebratulid brachiopod preserved in silica) Lower Devonian Glenerie Limestone Tristates Group Route 9W Glenerie, N,Y.
  5. Past weekend we had a "sunny" field trip to my usual hunting spot with the "LITHOS" geology club. We spent the whole day searching the late Devonian shales and nodules for al kind of fossils, brachiopods, crinoids, cephalopods, corals,... We did find the usual pyritised cephalopods ( manticoceras sp, tornoceras sp. and bactrites sp. ) but to me my biggest prize was when I hit a layer with a lot of goniatite anaptichy enjoy the pictures :
  6. Devonian oddball

    During a hunt in the upper Widder Fm (Devonian) in the Thedford area, I encountered these curious bits among the usual clatter of trilobites, brachs, and nautiloids. I have some ideas, but would like to see if they are on - or off - the mark. I've largely ruled out worm burrows as they appear in these shales as generally very thin and pyritized. They look like some form of plant matter, which would be a first for me in these shales. I've collected the positive and impression. It measures about 3 cm. They appear to have very fine, fibrous striations (although detail is wanting when using the iPad camera ). Could be something very underwhelming, but thought I'd canvass opinions! Thanks for having a look.
  7. From the album Middle Devonian

    Dipleura dekayi (partly disarticulated trilobite thorax and pygidium) Middle devonian Skaneateles Formation Delphi Member Hamilton Group Cole Hill Road North Brookfield, N.Y. A gift from Darktooth Dave. Thanks Dave.
  8. From the album Middle Devonian

    Taeniopora exigua (branching bryozoan) Middle Devonian Moscow Formation Windom Shale Hamilton Group Deep Springs Road Quarry Lebanon, N.Y.
  9. From the album Middle Devonian

    Phthonia sectifrons (bivalve shell) Middle Devonian Moscow formation Windom Shale Hamilton Group Deep Springs Road Quarry Lebanon, NY.
  10. Trilobite ID

    @piranha et al. This specimen was collected in the 1880s. It's mostly now an internal cast/mold, the exoskeleton having probably fallen off over the years. I had initially, and hastily, assumed it was Isotelus, but after receiving some Dipleura parts and matrix from @Darktooth today, I'm thinking this is actually Dipleura. Can you confirm or refute?
  11. 25 Years of Fossil Collecting Yields Clearest Picture of Extinct 12-Foot Aquatic Predator, Drexel University, May 8, 2018 https://www.delval.edu/news/25-years-of-fossil-collecting-yields-clearest-picture-yet-of-extinct-12-foot-aquatic-predator https://www.rdmag.com/news/2018/05/25-years-fossil-collecting-yields-clearest-pictureextinct-12-foot-aquatic-predator https://www.laboratoryequipment.com/news/2018/05/25-years-fossil-collecting-yields-clearest-picture-yet-extinct-12-foot-aquatic-predator The paper is: Daeschler, E.B. and Downs, J.P., 2018. New description and diagnosis of Hyneria lindae (Sarcopterygii, Tristichopteridae) from the Upper Devonian Catskill Formation in Pennsylvania, USA. Journal of Vertebrate Paleontology, p. e1448834. The abstract of this page can be found at; https://www.tandfonline.com/doi/abs/10.1080/02724634.2018.1448834 A related paper is: Cressler, W.L., Daeschler, E.B., Slingerland, R. and Peterson, D.A., 2010. Terrestrialization in the Late Devonian: a palaeoecological overview of the Red Hill site, Pennsylvania, USA. Geological Society, London, Special Publications, 339(1), pp. 111-128. https://digitalcommons.wcupa.edu/geol_facpub/8/ https://digitalcommons.wcupa.edu/cgi/viewcontent.cgi?referer=https://scholar.google.com/scholar?hl=en&as_sdt=0%2C19&q=Hyneria+lindae+devonian&btnG=&httpsredir=1&article=1008&context=geol_facpub Yours, Paul H.
  12. From the album Lower Devonian

    Actinopteria communis (Pteriomorpha bivalve) Lower Devonian Port Jervis Formation Tristates Group Shimer's Brook Montague, N.J.
  13. Mercury Rising: New evidence that volcanism triggered the late Devonian extinction, Geological Society of America, May 1, 2018 https://www.sciencedaily.com/releases/2018/05/180501161805.htm Volcanic Eruptions Led to Mass Extinction 370 Million Years Ago http://www.sci-news.com/geology/volcanic-eruptions-late-devonian-mass-extinction-05967.html The abstract is: Grzegorz Racki, Michał Rakociński, Leszek Marynowski, Paul B. Wignall. Mercury enrichments and the Frasnian- Famennian biotic crisis: A volcanic trigger proved? Geology, 2018; DOI: 10.1130/G40233.1 https://pubs.geoscienceworld.org/gsa/geology/article-abstract/530692/mercury-enrichments-and-the-frasnian-famennian Related papers are: Courtillot, V., Kravchinsky, V.A., Quidelleur, X., Renne, P.R. and Gladkochub, D.P., 2010. Preliminary dating of the Viluy traps (Eastern Siberia): Eruption at the time of Late Devonian extinction events?. Earth and Planetary Science Letters, 300(3-4), pp. 239-245. https://sites.ualberta.ca/~vadim/Publications-Kravchinsky.htm https://sites.ualberta.ca/~vadim/Publications-Kravchinsky_files/2010-Courtillot et al - Preliminary dating of the Viluy traps.pdf Kravchinsky, V.A., 2012. Paleozoic large igneous provinces of Northern Eurasia: correlation with mass extinction events. Global and Planetary Change, 86, pp. 31-36. https://sites.ualberta.ca/~vadim/Publications-Kravchinsky.htm https://sites.ualberta.ca/~vadim/Publications-Kravchinsky_files/2012-Kravchinsky - Paleozoic large igneous provinces of Northern Eurasia- Correlation with mass extinction events.pdf Ricci, J., Quidelleur, X., Pavlov, V., Orlov, S., Shatsillo, A. and Courtillot, V., 2013. New 40Ar/39Ar and K–Ar ages of the Viluy traps (Eastern Siberia): further evidence for a relationship with the Frasnian–Famennian mass extinction. Palaeogeography, Palaeoclimatology, Palaeoecology, 386, pp. 531-540. http://paleomag-ifz.ru/en/articles?page=1 http://www.paleomag-ifz.ru/sites/default/files/articles/ricci_et_al.pdf Carmichael, S.K., Waters, J.A., Batchelor, C.J., Coleman, D.M., Suttner, T.J., Kido, E., Moore, L.M. and Chadimová, L., 2016. Climate instability and tipping points in the Late Devonian: detection of the Hangenberg Event in an open oceanic island arc in the Central Asian Orogenic Belt. Gondwana Research, 32, pp. 213-231. https://pdfs.semanticscholar.org/270e/8f86bcc9677b802e049640d2dc8f8ab01652.pdf Yours, Paul H.
  14. Brachiopod unknown

    I collect in Coralville Iowa frequently and always run across these brachiopods. Yet I am unsure of their name in spite of investigation on line. They are NOT uncommon so the ID should be easy but eludes me. So here I am asking for assistance! They are flat as a pancake if that helps.
  15. ID: Large Crinoid

    Bought a nice big Crinoid from a friend of mine. Was found somewhere in Morocco, and apparently is from somewhere in the Devonian period. Is definitely not Schyphocrinites, that being what you usually see from Moroccan Crinoids. Not to good at Crinoid ID myself, so I’m seeking help. Specimen is 9.5” long at longest point, and 7” tall at tallest.
  16. I had been looking forward to a multi-day, multi-site trip since even before the semester ended. There's nothing like breaking rock to relieve the stress of grading papers. Deb and I made the drive down to Penn Dixie to meet up with Jay (DevonianDigger), Malcolm, Greg, and James. As we arrived at the Peace Bridge at around 11 am, we were delayed by construction on the bridge, a long lineup at the border, and a less than courteous border guard. And then construction in Buffalo with all its confusing signage meant taking detours upon detours. But eventually we made it by a little after 12:20. As Malcom alluded to in another thread, hardly any of us thought to take any pictures on the Friday as we were just too busy breaking rock. Jay had the excavator on site to test out some new areas on the site where we could dig into some fresh material, leaving the material for the Dig with the Experts alone. The site is vastly changed since last season, and it looks like it will be a productive one for those who go. I am still in the process of going through field finds, but I can at least for now share some pictures of the process and method when we crazy canucks come down to PD. Deb has snapped a picture of us at work in the newly excavated area. From left to right: James, Greg, Jay, and me. Malcolm is represented on the far left by his dolly that carries his trademark rock saw.
  17. Despite the foreboding weather prediction, the conditions for the spring gathering of TFF members at Deep Springs Road quarry was nearly ideal; sunny and pleasantly cool in the morning and when the rain finally did arrive in early afternoon it was only light and intermittent. Kane had announced to us he was traveling across the border from Ontario, accompanied by his wife, Deb, and member of the month, Jay (Devonian Digger). Members from New York, PA., Connecticut, and Massachusetts wanting to meet them and collect at a great spot gathered there. Deep Springs Road is the easternmost exposure of the Middle Devonian Hamilton Group's Moscow Formation's Windom Shale, the same formation exposed at Penn Dixie where Jay work and collects. But the fauna at Deep Springs Road is entirely different. Corals are nearly absent. Bivalves are extremely abundant. Species such as the large trilobite Dipleura dekayi which are very rare at Penn Dixie are common here. Every rock has the potential to reveal the gems of this rich and diverse fauna. Oh, and by the way, thanks largely to Kane and Jay's and Darktooth Dave's prodigious efforts a massive amount of rock was moved. In the picture, left to right-Kane's wife Deb, Jay, Mike (Pagurus) and his wife, Leila. Above them- Jay. On the far right, Tim (Fossildude19).
  18. Ohioan Placoderms?

    I have heard about placoderms being uncovered from the Devonian of Ohio, but am unable to find any references to specific placoderm fossil specimens and where they are in Ohio. Can someone please shed some light for me on the subject? (I'm looking for ones just from the Ohio area ) I consider placoderms awesome! Thanks a ton!
  19. Curious Rock or Bone?

    Hi everyone, for your consideration - I excavated for a septic system on my property here near Chittenango Falls, NY, which is Lower Middle Devonian. Can anyone identify from picture whether or not this is bone? There are a couple more rocks just like this one. I can post more pictures if need be, thank you for your time!
  20. I did this pic for friends that wanted to get an idea of what the fossils I collect look liked when alive. The hardest to explain are phyllocarids and cephalopods. This is a self collected specimen that I posted recently under - Upper Devonian of NY. Its not perfect but it did the job. Now explaining to them how they can be found in NY and that an ocean was here for many millions of years.
  21. Another local spot

    Hi Everyone, Now that RL is back to some measure of stability I'm exploring. Pa recently reworked an unstable road cut here in Blair county and some interesting material has weathered from the very soft Ridegely Member at the top of the Old Port Formation [Devonian]. With spring coming late I've located several other exposures of this layer and am excited because it is so easy to work (get the sandstone matrix wet and you can rub it off with your fingers!) I posted some unknowns over in the ID Help Section.
  22. New Road Cut Finds

    Got out Saturday and checked out a freshly reworked road Cut here in Blair County PA. If anyone would care to weigh in on ID of what i found I'd be interested. I'm looking forward to poking around here some more. I's most like to know what the round thing (labeled 'C") with the "plate-like" edges is. I know what I'm hoping it is and in reality what it most likely is but any help would be appreciated. Note: this a Devonian, Old Port Formation, Ridegely Member (a very soft coarse sandstone which in this locality is brownish but normally very white.) from Blair County PA. I'm posting some other items from the same spot over in the Pennsylvania Thread.
  23. Lambton Hunt

    After a brief morning hunt yesterday near my house, today was a whole day effort in Lambton County. Part of my purpose was to fill buckets with typical fossils to give to my US collecting comrades, but also as it would be Deb's season opener. A lot was found, but like I said, those buckets are surprises for some members I will be seeing next weekend. Of the stuff I am keeping, 3 pieces stick out... This Greenops is full, and just a bit buried. I found it within the first five minutes at the site, or about second or third rock I split. It was found wet so I slow-dried it and wrapped it carefully for the drive home. It survived, but will need to be stabilized as there are dangerous cracks running through this rock (not through the bug, though - phew!).
  24. Hello all! I found this out of context in some landscaping material in Virginia, but I believe I recognize the matrix as coming from the Culpeper basin, which which is Triassic... I'm totally lost on what these patterns come from! Any help would be great. Thanks! Edit : this is most probably not Culpeper basin material, but Devonian Catskill or similar based on responses- bad assumption based on where it was found ...
  25. Plant

    I found this in a gravel pit at the south east end of Moose Mt. in Maine. The fossils I find there have been exclusively marine invertebrates so I was trying to see perhaps scaphopod traces. The dark edges were hard to explain until I realized that this is what the plants that I find up in far north eastern Maine look like except in isn't flattened. Ya think ? oops end view pending.