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George E. Mustoe and Elizabeth T Smith, 2023. Timing of Opalization at Lightning Ridge, Australia: New Evidence from Opalized Fossils. Minerals 13(1471):1-43. Christian Voiculescu-Holvad, 2018. The Opalised Fossils of Australia: Mineralogical and Paleontological Treasures from the Australian Outback Yours, Paul H.

Fossilized Cicada Entombed In Opal Reveals Precious Gems Can Contain Ancient Life Rachael Funnell, IFL_Science, October 7, 2023 https://www.iflscience.com/fossilized-cicada-entombed-in-opal-reveals-precious-gems-can-contain-ancient-life-57413 Rare Fossil Reveals Cicada Entombed in Opal An insect trapped in a precious gem points to new places to search for ancient life Carolyn Wilke, Scientific American https://www.scientificamerican.com/article/rare-fossil-reveals-cicada-entombed-in-opal1/ The open accesspaper is: Chauviré, B., Houadria, M., Donini, A. et al. Arthropod entombment in weathering-formed opal: new horizons for recording life in rocks. Sci Rep 10, 10575 (2020). https://doi.org/10.1038/s41598-020-67412-9 Yours, Paul H.

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. Thanks in advance.

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 https://www.researchgate.net/publication/302497324_Origin_of_Petrified_Wood_Color Mustoe, G.E., 2017. Wood petrifaction: A new view of permineralization and replacement. Geosciences, 7(4), no.119. https://www.mdpi.com/2076-3263/7/4/119/htm https://pdfs.semanticscholar.org/4ff7/8f7c6899c4459c4f33e4d51c040f6374685d.pdf https://www.researchgate.net/publication/321170639_Wood_Petrifaction_A_New_View_of_Permineralization_and_Replacement Mustoe, G.E., 2018. Mineralogy of non-silicified fossil wood. Geosciences, 8(3), no.85. https://www.mdpi.com/2076-3263/8/3/85/htm https://www.researchgate.net/publication/323540027_Mineralogy_of_Non-Silicified_Fossil_Wood Mustoe, George E. "Non-mineralized fossil wood." Geosciences (8) no.223. https://www.mdpi.com/2076-3263/8/6/223 https://www.researchgate.net/publication/325827782_Non-mineralized_Fossil_Wood Luczaj, J.A., Leavitt, S.W., Csank, A.Z., Panyushkina, I.P. and Wright, W.E., 2018. Comment on “Non-Mineralized Fossil Wood” by George E. Mustoe (Geosciences, 2018). Geosciences, 8(12), no.462. https://www.mdpi.com/2076-3263/8/12/462/htm Mustoe, G.E., Viney, M. and Mills, J., 2019. Mineralogy of Eocene fossil wood from the “Blue Forest” locality, southwestern Wyoming, United States. Geosciences, 9(1), no.35. https://www.mdpi.com/2076-3263/9/1/35 https://www.researchgate.net/publication/330292211_Mineralogy_of_Eocene_Fossil_Wood_from_the_Blue_Forest_Locality_Southwestern_Wyoming_United_States Mustoe, G.E., 2015. Geologic History of Eocene Stonerose Fossil Beds, Republic, Washington, USA. Geosciences, 5(3), pp.243-263. https://www.mdpi.com/2076-3263/5/3/243 https://www.researchgate.net/publication/279786883_Geologic_History_of_Eocene_Stonerose_Fossil_Beds_Republic_Washington_USA Yours, Paul H.