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Found 6 results

  1. Oxytropidoceras

    Life and Death in the Ediacaran

    Life and Death in the Ediacaran: Evolutionary, Environmental and Preservational Dynamics Lidya Tarhan, Yale University, Virtual Seminars in Precambrian Geology Ediacaran Textures of Life: The ecological, biological and sedimentological Dr. Mary Droser Virtual Seminars in Precambrian Geology Virtual Seminars in Precambrian Geology Yours, Paul H.
  2. If this topic was posted in the wrong place feel free to pull out the whips and chains. These are being found at deposit of petrified wood in south Alabama. Silicification strata sure looks favorable in situ-clay, then 1 foot of wet sand and rounded quartzite, then the wood. No limb nots, most of it has straight parallel bands like a vascular plant. Occasionally some samples with annual rings. Complete logs are rare, most are segments from 5 to 50 pounds. It seems related to Tallahatta silicified sand(stone). And it seems to have silicified grey sand in it.
  3. Oxytropidoceras

    Fossil Wood Petrification and mineralogy

    Mustoe, G.E., 2015. Late Tertiary petrified wood from Nevada, USA: Evidence of multiple silicification pathways. Geosciences, 5(4), pp.286-309. https://www.mdpi.com/2076-3263/5/4/286 https://www.researchgate.net/publication/282851612_Late_Tertiary_Petrified_Wood_from_Nevada_USA_Evidence_of_Multiple_Silicification_Pathways https://sciprofiles.com/profile/112497 https://www.researchgate.net/profile/George_Mustoe Mustoe, G. and Acosta, M., 2016. Origin of petrified wood color. Geosciences, 6(2), no.25. https://www.mdpi.com/2076-3263/6/2/25
  4. doushantuo

    Fife PHO PHUM

    I posted this because East Kirkton lit. is rare. It is relatively short,and is a careful analysis of the "Faziesverhaltnisse" ,diagenesis and taphonomy of this famous site. Biotic content: amphibia/"tetrapods"/plant taphonomic mode: silicification Significance:"silicification" and "vertebrate" aren't found in the same sentence often Rolfeetal1990.pdf
  5. Cementing a theory about the sea creatures of the Ediacara Biota by Jim Shelton, Yale University, October 6, 2016 http://news.yale.edu/2016/10/06/cementing-theory-about-sea-creatures-ediacara-biota Ancient ocean quirk left us these bizarre fossils By Jim Shelton, Fossils, Yale University, October 11, 2016 http://www.futurity.org/fossils-oceans-1268312-2/ Tarhan, L. G., A. V. S. Hood, M. L. Droser, J. G. Gehling, and D. E.G. Briggs, 2016, Exceptional preservation of soft-bodied Ediacara Biota promoted by silica-rich
  6. Jdeutsch

    Petrification Of Wood

    I'm a bit confused with terminology. I always assumed that the fine micro crystalline wood was made through replacement, and therefore the micro structure was very fine, and the specimen was very hard..Picture 1 Where as the coarser fossil wood was formed through silicification and this wood is generally softer and younger than specimens formed by replacement.Picture 2. ( In fact, when looking at the specimen in picture 2 in hand, it is hard to believe this isn't just wood, although it does have pockets with crystals (picture 3). ) Are there obvious features to determine replacement versus
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