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Found 14 results

  1. Anomotodon

    2023 Mazon Creek trips

    Hey everyone! Haven't posted here in a while, and thought I would come back with a trip report. Recently I became interested in Mazon Creek fossils - something unusual for me as a vertebrate person. I finally managed to get out in the field this spring and visit the Mazonia-Braidwood State Park and the Braceville spoil pile through an ESCONI trip. I have collected at quite a few Paleozoic sites before, but this was my first time hunting in the Carboniferous! I went to Mazonia with a friend on a weekend in early April, when there was no foliage and it was sunny outside. I read a lot of threads about Mazon Creek on this forum and we decided to go straight through the bushes to search for the most inaccessible areas we could find. Here are a few concretions. Sadly, both of these turned out to be empty Also found a first Pennsylvanian garter snake Here is our total haul for ~4 hours. The only non-Essexella thing we found already open was this coprolite (?). By the way - if you see any errors with identification in this thread please correct me, I'm still learning a lot about this awesome deposit. Then came the freeze-thaw. I decided to cheat a little and use the -80C freezer in the lab I work in, which shortens the freezing part of the cycle to a few hours. At this point, most of the concretions from this trip have already opened: My nicest and largest Essexella ascherae. Another Essexella (after vinegar). When it opened, I first thought it was some arthropod segment, but I like it anyways. This one is weird. Coprolite? Probably nothing (?), but the pyrite is pretty. A plant of some kind, probably not identifiable. And my favorite find: I believe this is the apex of a Calamites sp. - segments are clearly visible. This concretion didn't want to open for over a month, so I got frustrated and dropped it from the 4th floor of my building as I didn't have a hammer with me... Don't do that.
  2. I have had this question for some time now and recently had it come up again. I was wondering does anyone know if there are particular conditions that affect the number of Conservat Lagerstätten we see on the earth at any given time? I got this question because in my time collecting and learning about fossils it seemed to me that times like the Cambrian seem to have quite a number of these sites, and the type of preservation in them seems fairly consistent and similar, as we go into the Ordovician I know if fewer but still a few and they also have pretty similar preservation. The Silurian and Devonian on the other hand, seem to have much fewer, off the top of my head I can probably only think of a couple, but then you get into the Carboniferous and it once again seems like there are much higher numbers of these sites. The Carboniferous is especially interesting because a number of these sites have more usual nice preservation like Bear Gulch, Kinney Quarry, Hamilton Kansas, etc but also a number of sites have Siderite concretions with exceptional preservation like a few sites in the US including Mazon Creek and some in the UK I believe, a type of preservation I have not seen in any other time periods. I am not sure if this patchy record of sites with good quality preservation continues further outside of the Paleozoic, but this is where I noticed it occuring due to mostly focusing on that time span. Is all of this down to the different conditions on earth during these different times? Is there a degree that our sampling bias or just how much attention each of these gets that plays into how many we know from each time? I have been curious about this for some time and thought maybe someone here would know more about the subject. Thanks for looking! Misha
  3. Strangely Cooked Bones From 300 Millions Years Ago Can Finally Be Explained Michelle Starr, Nature, Science Alert, December 13, 2022 Ancient amphibians had their bones cooked, Trinity College Dublin The open access paper is: Gogáin, A.Ó., O'Sullivan, G., Clements, T., Hoare, B.C., Murray, J. and Wyse Jackson, P.N., 2022. Metamorphism as the cause of bone alteration in the Jarrow assemblage (Langsettian, Pennsylvanian) of Ireland. Palaeontology, 65(6), p.e12628. Yours, Paul H.
  4. marguy

    new permian lagerstätte

    https://www.nature.com/articles/s42003-022-04132-y enjoy....
  5. Lost fossil 'treasure trove' rediscovered after 70 years Previous researchers were unable to record its exact coordinates. Harry Baker, Live Science 70 anos depois, mais de 100 fósseis são encontrados em sítio paleontológico perdido no RS Por Redação Univates e Redação Unipampa The paper is: Ferraz, J.S., Bulsing, K.P., Manfroi, J., Guerra-Sommer, M., Jasper, A., and Pinheiro, F., The Rediscovery of the Cerro Chato Outcrop, an Important Permian Fossil Site of the Paraná Basin. Vol. 36 No. 75 (2021): Paleodest – e Notas Científicas Open access PDF of paper Yours, Paul H.
  6. Dean Ruocco

    Bertie Problematic

    Here's an enigmatic specimen that has puzzled me. There are other specimens that have been found. One researchers opinion was it was a Telson that washed around and became "loosie goosey", Another's was its from Dolichopterus which also could make sense. Others have said its from some sort of Pyllocarid or a Acanthodian. I personally agree with the Telson theory but id love to hear your opinions!!
  7. Great open access paper about the Devonian Gogo Formation Lagerstätte, Canning Basin, West Australia. Trinajstic, K., Briggs, D.E. and Long, J.A., 2021. The Gogo Formation Lagerstätte: a view of Australia's first great barrier reef. Journal of the Geological Society. Yours, Paul H.
  8. Crusty_Crab

    New Cambrian Lagerstatte

    A new lower Cambrian Lagerstatte from China! They surmised this was a nursery, but will doubtless add to our understanding of the Chengjiang and Burgess Shale fauna. Interesting there was no mention of the Cambrian explosion. https://www.livescience.com/cambrian-paleonursery-haiyan-lagerstatte.html
  9. Joyce, W.G. and Mäuser, M., 2020. New material of named fossil turtles from the Late Jurassic (late Kimmeridgian) of Wattendorf, Germany. Plos one, 15(6), p.e0233483.doi: https://doi.org/10.1371/journal.pone.0233483 https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0233483 https://www.researchgate.net/publication/341884475_New_material_of_named_fossil_turtles_from_the_Late_Jurassic_late_Kimmeridgian_of_Wattendorf_Germany https://plos.figshare.com/articles/NKMB_Watt09_162_i_Tropidemys_seebachi_i_late_Kimmeridgian_of_Wattendorf_Germany_/12419039 PDF: https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0233483&type=printable Fürsich, F.T., Mäuser, M., Schneider, S. and Werner, W., 2007. The Wattendorf Plattenkalk (Upper Kimmeridgian)–a new conservation lagerstätte from the northern Franconian Alb, southern Germany. Neues Jahrbuch für Geologie und Paläontologie-Abhandlungen, 245(1), pp.45-58. https://www.researchgate.net/publication/249518036_The_Wattendorf_Plattenkalk_Upper_Kimmeridgian_-_a_new_conservation_lagerstatte_from_the_northern_Franconian_Alb_southern_Germany Chellouche, P., Fürsich, F.T. and Mäuser, M., 2012. Taphonomy of neopterygian fishes from the Upper Kimmeridgian Wattendorf Plattenkalk of Southern Germany. Palaeobiodiversity and Palaeoenvironments, 92(1), pp.99-117. https://www.researchgate.net/publication/257920454_Taphonomy_of_neopterygian_fishes_from_the_Upper_Kimmeridgian_Wattendorf_Plattenkalk_of_Southern_Germany Yours, Paul H.
  10. Exceptional fossils may need a breath of air to form University of Texas at Austin, November 6, 2019 https://phys.org/news/2019-11-exceptional-fossils-air.html https://www.sciencedaily.com/releases/2019/11/191106112109.htm https://www.eurekalert.org/pub_releases/2019-11/uota-efm110519.php Exceptionally preserved Jurassic sea life found in new fossil site by University of Texas at Austin https://phys.org/news/2017-01-exceptionally-jurassic-sea-life-fossil.html The paper is: A.D. Muscente Et Al, Taphonomy Of The Lower Jurassic Konservat-Lagerstätte At Ya Ha Tinda (Alberta, Canada) And Its Significance For Exceptional Fossil Preservation During Oceanic Anoxic Events, Palaios (2019). DOI: 10.2110/Palo.2019.050 https://pubs.geoscienceworld.org/sepm/palaios/article/34/11/515/574686/TAPHONOMY-OF-THE-LOWER-JURASSIC Martindale, R.C., Them, T.R., Gill, B.C., Marroquín, S.M. and Knoll, A.H., 2017. A new Early Jurassic (ca. 183 Ma) fossil Lagerstätte from Ya Ha Tinda, Alberta, Canada. Geology, 45(3). https://par.nsf.gov/servlets/purl/10066020 https://vtechworks.lib.vt.edu/bitstream/handle/10919/81874/Geology 2017 Martindale-2.pdf?sequence=1 Yours, Paul H.
  11. Half the species in a new Cambrian fossil site are completely new to us John Timmer, Ars Technica, March 21, 2019 https://arstechnica.com/science/2019/03/spectacular-trove-of-cambrian-fossils-uncovered-in-china/ Unknown species found in new treasure trove of fossils found in China Ashley Strickland, CNN News, March 21, 2018 https://www.cnn.com/2019/03/21/world/china-new-fossils-qingjiang-scn/index.html Scientists Find Huge Trove of Marine Fossils from the 'Cambrian Explosion' in China, Ryan F. Mandelbaum, Gizmodo, March 21, 2019 https://gizmodo.com/scientists-find-huge-trove-of-marine-fossils-from-the-c-1833469727 The paper is; Fu, D, Tong, G., et al., 2019, The Qingjiang biota—A Burgess Shale–type fossil Lagerstätte from the early Cambrian of South China Science 22 Mar 2019: Vol. 363, Issue 6433, pp. 1338-1342 DOI: 10.1126/science.aau8800 http://science.sciencemag.org/content/363/6433/1338.full Yours, Paul H.
  12. The Amateur Paleontologist

    Trace Fossil sites

    Hey everyone I recently heard about a paper on the definition of "Lagerstätte" (see attached); and it did raise an interesting question - "Can a trace fossil site be called a Lagerstätte?" What do you guys think about this? -Christian On_the_definition_of_Lagerstatte.pdf
  13. The open access paper is: Clements, T., Purnell, M. and Gabbott, S., 2018. The Mazon Creek Lagerstätte: a diverse late Paleozoic ecosystem entombed within siderite concretions. Journal of the Geological Society. Journal of the Geological Society (2018) 176 (1): 1-11. https://doi.org/10.1144/jgs2018-088 https://pubs.geoscienceworld.org/sepm/jgs/article/545488/the-mazon-creek-lagerstatte-a-diverse-late https://pubs.geoscienceworld.org/jgs/issue/current Another open access paper is: Briggs, D.E., Liu, H.P., McKay, R.M. and Witzke, B.J., 2018. The Winneshiek biota: exceptionally well-preserved fossils in a Middle Ordovician impact crater. Journal of the Geological Society, 175(6), pp.865-874. https://pubs.geoscienceworld.org/jgs/article/175/6/865/548502/the-winneshiek-biota-exceptionally-well-preserved https://pubs.geoscienceworld.org/jgs/issue/175/6 Yours, Paul H.
  14. Kosmoceras

    Ophiopinna elegans

    Villier, L., Charbonnier, S. and Riou, B. (2009). Sea stars from Middle Jurassic lagerstätte of La Voulte-sur-Rhône (Ardèche, France). Journal of Paleontology, 83(3), pp.389-398.
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