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Found 5 results

  1. 3.42-billion-year-old fossil threads may be the oldest known archaea microbes. The structure and chemistry of the filaments hints that they may be ancient cells. By Carolyn Wilke, Science News, July 26, 2021 Cavalazzi, B., Lemelle, L., Simionovici, A., Cady, S.L., Russell, M.J., Bailo, E., Canteri, R., Enrico, E., Manceau, A., Maris, A. and Salomé, M., 2021. Cellular remains in a~ 3.42-billion-year-old subseafloor hydrothermal environment. Science Advances, 7(29), p.eabf3963. Yours, Paul H.
  2. Oxytropidoceras

    Life on Earth Before Oxygen in the Archean

    We may Finally know what life on Earth breathed before there was oxygen By Carly Cassella, ScienceAlert The open access paper is: Visscher, Pieter T., Kimberley L. Gallagher, Anthony Bouton, Maria E. Farias, Daniel Kurth, Maria Sancho-Tomás, Pascal Philippot et al. "Modern arsenotrophic microbial mats provide an analogue for life in the anoxic Archean." Communications Earth & Environment 1, no. 1 (2020): 1-10. Yours, Paul H.
  3. Rule, R.G. and Pratt, B.R., 2019. The pseudofossil Horodyskia: Flocs and flakes on microbial mats in a shallow Mesoproterozoic sea (Appekunny Formation, Belt Supergroup, western North America). Precambrian Research, 333, p.105439. Archived PDF file More papers by Brian R. Pratt Retallack, G.J., Dunn, K.L. and Saxby, J., 2013. Problematic Mesoproterozoic fossil Horodyskia from Glacier National Park, Montana, USA. Precambrian Research, 226, pp.125-142. Archived PDF file Yours, Paul H.
  4. DPS Ammonite

    Miocene Fossil Microbe ? Mats

    I found the silicified and brecciated laminar structures in Miocene lake deposits north of Phoenix, Arizona. Could they be disturbed algal mats? I envision a drying algal mat in a lake that is disturbed by an event such as a flood, windstorm, landslide or earthquake. Compare to Kinneyia trace fossil: https://woostergeologists.scotblogs.wooster.edu/2015/10/23/woosters-fossil-maybe-of-the-week-kinneyia-ripples/ Confirmed stromatolites occur nearby in the lake sediments. Photo 1: typical wrinkled/ cracked marks in surface of laminar structures. Photo 2: typical piece of folded and brecciated laminar structures. Photo 3: detail of photo 2. Photo 4: edge of rock in photo 2. 4.5 cm field of view. Photo 5: Another piece. Photo 6: detail of photo 5. Photo 7: edge of photo 5. 3 cm field of view.
  5. Himmler, T., Smrzka, D., Zwicker, J., Kasten, S., Shapiro, R.S., Bohrmann, G. and Peckmann, J., 2018. Stromatolites below the photic zone in the northern Arabian Sea formed by calcifying chemotrophic microbial mats. Geology. https://www.researchgate.net/publication/323211798_Stromatolites_below_the_photic_zone_in_the_northern_Arabian_Sea_formed_by_calcifying_chemotrophic_microbial_mats https://www.researchgate.net/scientific-contributions/74385017_Tobias_Himmler https://pubs.geoscienceworld.org/gsa/geology/article/528309/stromatolites-below-the-photic-zone-in-the Yours, Paul H.
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