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Showing results for tags 'glaciation'.
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A short post today, just wanted to upload this interesting Rhizocorallium (?) I found on my most recent fossil hunting trip! It’s still the dead of winter here in Saskatoon, but we had a warm snap recently and I was able to hike out to a local glacial silt exposure and found it. Hoping to return to this site soon and hopefully find more!
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benthic phototrophic macroalgae indicate taht 'Snowball Earth' might have been 'Slushball Earth'
Oxytropidoceras posted a topic in Fossil News
'Snowball Earth' might have been slushball by University of Cincinnati, April 9, 2023 The open access paper is: Song, H., An, Z., Ye, Q., Stüeken, E.E., Li, J., Hu, J., Algeo, T.J., Tian, L., Chu, D., Song, H. and Xiao, S., 2023. Mid-latitudinal habitable environment for marine eukaryotes during the waning stage of the Marinoan snowball glaciation. Nature Communications, 14(1), p.1564. Researchgate PDF Yoru, Paul H.- 1 reply
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- carbon isotopes
- china
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Late Ordovician mass extinction - volcanism and warming or cooling and glaciation?
Oxytropidoceras posted a topic in Fossil News
There is a series of open access papers about what caused the Late Ordovician mass extinction. They are: Bond, D.P. and Grasby, S.E., 2020. Late Ordovician mass extinction caused by volcanism, warming, and anoxia, not cooling and glaciation. Geology. https://pubs.geoscienceworld.org/gsa/geology/article/doi/10.1130/G47377.1/586486/Late-Ordovician-mass-extinction-caused-by Mitchell, C. E., and Melchin, M.J., 2020. COMMENT: Late Ordovician mass extinction caused by volcanism, warming, and anoxia, not cooling and glaciation. Geology https://pubs.geoscienceworld.org/gsa/geology/article/doi/10.1130/G47946C.1/587311/COMMENT-Late-Ordovician-mass-extinction-caused-by Bond, D.P. and Grasby, S.E., 2020. REPLY: Late Ordovician mass extinction caused by volcanism, warming, and anoxia, not cooling and glaciation. Geology. https://pubs.geoscienceworld.org/gsa/geology/article/doi/10.1130/G47984Y.1/587312/REPLY-Late-Ordovician-mass-extinction-caused-by Wang, G., Zhan, R. and Percival, I.G., 2019. The end-Ordovician mass extinction: A single-pulse event?. Earth-Science Reviews, 192, pp.15-33. https://www.sciencedirect.com/science/article/pii/S0012825218305099 https://www.researchgate.net/publication/331275476_The_end-Ordovician_mass_extinction_A_single-pulse_event https://www.researchgate.net/profile/Gx_Wang2 Yours, Paul H.-
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- anoxia
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Ancient ‘Snowball Earth’ thawed out in a flash By Lucas Joel, Apr. 2, 2019 , 10:50 AM https://www.sciencemag.org/news/2019/04/ancient-snowball-earth-thawed-out-flash The paper is: Zhou, C., Huyskens, M.H., Lang, X., Xiao, S. and Yin, Q.Z., 2019. Calibrating the terminations of Cryogenian global glaciations. Geology, 47(3), pp.251-254. https://pubs.geoscienceworld.org/gsa/geology/article-abstract/47/3/251/568701/calibrating-the-terminations-of-cryogenian-global?redirectedFrom=fulltext An earlier article is: Ancient Earth froze over in a geologic instant By Lucas Joel Jun. 7, 2018 , 4:40 PM https://www.sciencemag.org/news/2018/06/ancient-earth-froze-over-geologic-instant The paper for this article is: MacLennan, S., Park, Y., Swanson-Hysell, N., Maloof, A., Schoene, B., Gebreslassie, M., Antilla, E., Tesema, T., Alene, M. and Haileab, B., 2018. The arc of the Snowball: U-Pb dates constrain the Islay anomaly and the initiation of the Sturtian glaciation. Geology, 46(6), pp.539-542. http://www.princeton.edu/geosciences/people/maloof/papers_pub/54Maloof.pdf Also, there is: Rooney, A.D., Strauss, J.V., Brandon, A.D. and Macdonald, F.A., 2015. A Cryogenian chronology: Two long-lasting synchronous Neoproterozoic glaciations. Geology, 43(5), pp.459-462. https://projects.iq.harvard.edu/files/fmacdonald/files/rooney_etal_geology_2015.pdf https://www.researchgate.net/profile/Alan_Rooney https://www.researchgate.net/publication/275523064_A_Cryogenian_chronology_Two_long-lasting_synchronous_Neoproterozoic_glaciations Yours, Paul H.
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- cryogenian
- geochronology
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Neoproterozoic glacial origin of the Great Unconformity
Oxytropidoceras posted a topic in Fossil News
Researchers suggest missing crust layer can be blamed on 'Snowball Earth' January 3, 2019 by Bob Yirka, Phys.org https://phys.org/news/2019-01-crust-layer-blamed-snowball-earth.html Around the world, miles of rock are missing. Could ‘Snowball Earth’ be the culprit? by Julian Rosen, Los Angeles Times, January 3, 2019 https://www.latimes.com/science/sciencenow/la-sci-sn-snowball-earth-geology-20190103-story.html the paper is: C. Brenhin Keller et al. Neoproterozoic glacial origin of the Great Unconformity, Proceedings of the National Academy of Sciences (2019). DOI: 10.1073/pnas.1804350116 https://www.pnas.org/content/early/2018/12/26/1804350116 Yours, Paul H.-
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- gaskiers
- glacial erosion
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Kornei, K. (2018), Tiny algae may have prompted a mass extinction, Eos, 99, https://doi.org/10.1029/2018EO102539. Published on 11 July 2018. https://eos.org/articles/tiny-algae-may-have-prompted-a-mass-extinction https://eos.org/wp-content/uploads/2018/08/eos0918.pdf?x69145 https://eos.org/current-issues The paper is; Shen, J., Pearson, A., Henkes, G.A., Zhang, Y.G., Chen, K., Li, D., Wankel, S.D., Finney, S.C. and Shen, Y., 2018. Improved efficiency of the biological pump as a trigger for the Late Ordovician glaciation. Nature Geoscience, 11(7), p.510. https://www.nature.com/articles/s41561-018-0141-5 Yours, Paul H.
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- algae
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Feulner, G., 2017. Formation of most of our coal brought Earth close to global glaciation. Proceedings of the National Academy of Sciences, 114(43), pp. 11333-11337. Abstract: http://www.pnas.org/content/114/43/11333.short https://www.ncbi.nlm.nih.gov/pubmed/29073052 Paper: https://pdfs.semanticscholar.org/0b23/8273be5a2b4f06d7fb1e5932b45f731944be.pdf Yours, Paul H.
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- carboniferous
- coal
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