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Showing results for tags 'cambrian explosion'.
Found 15 results
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Protomelission is an early dasyclad alga and not a Cambrian bryozoan?
Oxytropidoceras posted a topic in Fossil News
520-million-year-old animal fossils might not be animals after all The specimens may be an ancient type of algae, not creatures known as bryozoans ScienceNews, March 10, 2023 The paywalled paper is: Yang, J., Lan, T., Zhang, X.G. and Smith, M.R., 2023. Protomelission is an early dasyclad alga and not a Cambrian bryozoan. Nature, published online, March 8, 2023 pp.1-5. Yorus, Paul H. -
Extraordinary soft-bodied fossils highlight the Cambrian explosion Derek Briggs, Yale University The Cambrian Explosion and the evolutionary origin of animals Professor Paul Smith, Oxford University Museum of Natural History What triggered the Cambrian Explosion? Professor Rachel Wood, University of Edinburgh Virtual palaeontology: bringing the first animals to life in 3D Dr Imran Rahman, Oxford University Museum of Natural History An alternative reading of the history of life using trace fossils Professor Gabriela Mángano, University of Saskatchewan, Canada Yours, Paul H.
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Supermountains might have affected the evolution of life on Earth
Oxytropidoceras posted a topic in Fossil News
Supermountains controlled the evolution of life on Earth Australian National University, February 2, 2022 EurekaAlert posting Scientists discover lost range of 'supermountains' three times longer than the Himalayas By Brandon Specktor, Live Science, February 4, 2022 The destruction of these ancient mountains may have fueled Earth's biggest evolution booms. Selected papers: Zhu, Z., Campbell, I.H., Allen, C.M., Brocks, J.J. and Chen, B., 2022. The temporal distribution of Earth's supermountains and their potential link to the rise of atmospheric oxygen and biological evolution. Earth and Planetary Science Letters, 580, p.117391. Squire, R.J., Campbell, I.H., Allen, C.M. and Wilson, C.J., 2006. Did the Transgondwanan Supermountain trigger the explosive radiation of animals on Earth?. Earth and Planetary Science Letters, 250(1-2), pp.116-133. Yorus, Paul H.- 2 replies
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The strange race to track down a missing billion years (The Great Unconformity)
Oxytropidoceras posted a topic in Fossil News
The strange race to track down a missing billion years Zaria Gorvett, BBC News, September 1, 2021 A billion years have vanished from the geological record – and over 152 years after this was first discovered, scientists can't agree on why. Some papers: Peters, S.E. and Gaines, R.R., 2012. Formation of the ‘Great Unconformity’as a trigger for the Cambrian explosion. Nature, 484(7394), pp.363-366. Keller, C.B., Husson, J.M., Mitchell, R.N., Bottke, W.F., Gernon, T.M., Boehnke, P., Bell, E.A., Swanson-Hysell, N.L. and Peters, S.E., 2019. Neoproterozoic glacial origin of the Great Unconformity. Proceedings of the National Academy of Sciences, 116(4), pp.1136-1145. Open access Marshak, S., Domrois, S., Abert, C., Larson, T., Pavlis, G., Hamburger, M., Yang, X., Gilbert, H. and Chen, C., 2017. The basement revealed: Tectonic insight from a digital elevation model of the Great Unconformity, USA cratonic platform. Geology, 45(5), pp.391-394. Yours, Paul H.-
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Cambrian Explosion and Ordovician Diversification Event Mirrored in Ichnofossil Data
Scylla posted a topic in Fossil News
Oxygen levels also important in biodiversity of trace fossils. https://phys.org/news/2020-08-ancient-life-story-early-diversity.html-
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Ediacaran worm fossil rolls back origins of animal life
Oxytropidoceras posted a topic in Fossil News
These tracks were made by a foot-long worm on a "death march" 550 million years ago. Newsweek, Sept. 4, 2019 (has pictures ) https://www.newsweek.com/ancient-worm-tracks-evolution-life-1457624 Barras, C., 2019. Ancient worm fossil rolls back origins of animal life. Nature, 573(7772), p.15. https://www.nature.com/articles/d41586-019-02556-x https://www.nature.com/magazine-assets/d41586-019-02556-x/d41586-019-02556-x.pdf Chen, Z., Zhou, C., Yuan, X. and Xiao, S., 2019. Death march of a segmented and trilobate bilaterian elucidates early animal evolution. Nature, pp.1-4. https://www.nature.com/articles/s41586-019-1522-7 Yours, Paul H.-
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Study of Russian fossils and geochemistry adds evidence that the Cambrian explosion was influenced by rising oxygen levels https://www.google.com/amp/s/www.sciencealert.com/earth-s-oxygen-levels-may-have-guided-animal-evolution-during-the-cambrian-explosion/amp
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The subject of this article is probably old news....but they spent a significant amount of space highlighting the importance of amateur collectors and thanking them for their contributions. Thought it might be nice to read about that http://www.geologypage.com/2018/09/half-billion-year-old-fossils-offer-new-clues-to-how-life-exploded-on-the-sea-floor.html
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There is a Vetulicola (partial) somewhere on this piece, I have been looking at it for awhile but I can't really spot where it is on here, anyone more familiar with Chengjiang fossils able to spot it or id for sure as vetulicola?
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Collected on a field trip to U-Dig Utah and prepared at the U-Dig site station. After a light mechanical brush exposed the shale, mineral oil was applied with another brush for a polished finish.
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What in your opinion most likely caused the Cambrian explosion?
Hat posted a topic in General Fossil Discussion
I read a book called In the Blink of an Eye not long ago where the author claimed that the development of the eye is what led to the expansion of biodiversity. I've also heard the development of hard parts, changes in environment, and genetic causes. I honestly don't have a feeling on this one. Do you? -
Schiffbauer, J. D., J. W. Huntley, G. R. O’Neil, S. A.F. Darroch, M. Laflamme, and Y. Cai, 2016, The Latest Ediacaran Wormworld Fauna: Setting the Ecological Stage for the Cambrian Explosion. GSA Today. V. 26, no. 11, pp. 4-11. http://www.geosociety.org/gsatoday/archive/26/11/pdf/i1052-5173-26-11-4.pdf http://www.geosociety.org/gsatoday/archive/26/11/article/i1052-5173-26-11-4.htm http://www.geosociety.org/gsatoday/archive/26/11/ Schiffbauer, J. D., 2016, The age of tubes: A window into biological transition at the Precambrian-Cambrian boundary. Geology. v. 44 no. 11 p. 975-976 http://geology.gsapubs.org/content/44/11/975.full Yours, Paul H.
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Oxygen levels were key to early animal evolution, strongest evidence now shows, University College London, September 23, 2016 http://www.ed.ac.uk/news/2016/ocean-oxygen-is-key-to-animal-evolution https://www.sciencedaily.com/releases/2016/09/160923100751.htm http://phys.org/news/2016-09-ocean-oxygen-key-animal-evolution.html Tostevin, R., R. A. Wood, G. A. Shields, S. W. Poulton, R. Guilbaud, F. Bowyer, A. M. Penny, T. He, A. Curtis, K. H. Hoffmann, M. O. Clarkson. Low-oxygen waters limited habitable space for early animals. Nature Communications, 2016; 7: 12818 DOI: 10.1038/ncomms12818 http://www.nature.com/ncomms/2016/160923/ncomms12818/full/ncomms12818.html Other papers are: Chen, X.; H. F. Ling, D. Vance, G. A. Shields-Zhou, M. Zhu, S. W. Poulton, L. M. Och, S. Y. Jiang, D. Li, L. Cremonese, and C. Archer, 2015, Rise to modern levels of ocean oxygenation coincided with the Cambrian radiation of animals., Nature Communications, 6. doi: 10.1038/ncomms8142 http://eprints.whiterose.ac.uk/86399/1/Nature communications 2015.pdf and http://www.see.leeds.ac.uk/people/s.poulton Lyons, T. W., C. T. Reinhard, and N. J. Planavsky, 2015, The rise of oxygen in Earth’s early ocean and atmosphere. (review article). Nature. Vol. 506, pp. 307–315. doi:10.1038/nature13068 http://earthscience.rice.edu/wp-content/uploads/2015/11/Nature-2015-Lyons.pdf http://www.nature.com/nature/journal/v506/n7488/abs/nature13068.htm Yours, Paul H.
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Hi Guys, I'm new on here and I am a 3D Artist or Artist in general from 2D Illustrations to 3D. I really enjoyed learning as a child about dinosaurs and all animals. My Dad still holds on to my old Dinosaur toys and animal cards to this day and wont give them back to have something to remember me by. I will be 3D Modeling this Ammonite and animating it. I will share my progress on here with you all. I have an image below of my fossil as well as a 3D scan of it I had done, a while back at the Siggraph animation / technology convention by 3 rivers 3D. http://www.3rivers3d.com/gallery1.html. Thanks, William
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First off, great work guys! Some really impressive art in this section. Here's a piece I collaborated on with the eminent Sam Gon Ohu III. We did this over 10 years ago, but have gotten many requests to use it in a variety of media over the years, (recently in a text book) so I kind of dust it off a little each time and thought I'd post it here. Full explanation is on Sam's excellent trilobite site and can be found here: http://www.trilobites.info/triloclass.htm%C2'>
