davidcpowers Posted March 17, 2020 Share Posted March 17, 2020 Looking to have growths id present on late cretaceous wood. The growths are the scales present on the wood. They appear to have been growing between wood layers. Wood is partly carbonized and not fully mineralized. Wood was drift wood mixed in with baculites and scaphites. Fossil taken in situ from upper part of Kevin mb of Marias Fm in Montana. 1 Link to comment Share on other sites More sharing options...
DPS Ammonite Posted March 17, 2020 Share Posted March 17, 2020 What are those disks composed of? If they are made of sediment then I suspect that they are sediment filled burrows made into the wood. It looks like an imprint of parallel wood grain lines in the area bounded by the yellow lines. The carbonized wood has eroded away around the burrows. 7 My goal is to leave no stone or fossil unturned. See my Arizona Paleontology Guide link The best single resource for Arizona paleontology anywhere. Link to comment Share on other sites More sharing options...
Norki Posted March 17, 2020 Share Posted March 17, 2020 Hey there, I've encountered similar structures in fossil driftwood myself, and the conclusion made by a few people is that they represent sediment-filled burrows, likely from a wood-boring clam. The wood was carbonized and very flaky, and had clearly eroded away from around the burrows. My example comes from an exposure of the Bearpaw formation in Saskatchewan, which you might know is also present in northern Montana and likely of similar age to the Marias formation, judging by the presence of baculites and scaphites. Anyway, I know they're not the same shape exactly, but I think that the similarity is more than superficial. Hope that helps. ps, That's a pretty cool slab. It's really like a snapshot of the sea floor. 5 Link to comment Share on other sites More sharing options...
supertramp Posted March 17, 2020 Share Posted March 17, 2020 I would check for "teredolites" (wood borin clams in this case, I think) http://www.clastics.com/teredolites.htm ciao 2 Link to comment Share on other sites More sharing options...
Oxytropidoceras Posted March 17, 2020 Share Posted March 17, 2020 Some online PDFs about Teredolites: Gingras, M.K., Maceachern, J.A. and Pickerill, R.K., 2004. Modern perspectives on the Teredolites ichnofacies: observations from Willapa Bay, Washington. Palaios, 19(1), pp.79-88. https://www.researchgate.net/publication/279566206_Modern_perspectives_on_the_Teredolites_ichnofacies_Observations_from_Willapa_Bay_Washington https://www.researchgate.net/profile/Murray_Gingras/3 Rajkonwar, C., Ralte, V.Z., Lianthangpuii, P.C., Tiwari, R.P. and Patel, S.J., 2014. Miocene ichnofossils from Upper Bhuban succession, Bhuban Formation (Surma group), Mizoram, India. Paleontol. Soc. India Spec. Publ, pp.247-255. https://www.researchgate.net/publication/269164305_MIOCENE_ICHNOFOSSILS_FROM_UPPER_BHUBAN_SUCCESSION_BHUBAN_FORMATION_SURMA_GROUP_MIZORAM_INDIA https://www.academia.edu/21354666/Teredolites_clavatus_from_the_upper_Bhuban_formation_of_the_Aizawl_district_Mizoram_India https://www.academia.edu/people/search?utf8=✓&q=Teredolites Savrda, C.E., Counts, J., McCormick, O., Urash, R. and Williams, J., 2005. Log-grounds and Teredolites in transgressive deposits, Eocene Tallahatta Formation (southern Alabama, USA). Ichnos, 12(1), pp.47-57. https://www.researchgate.net/publication/233000812_Log-Grounds_and_Teredolites_in_Transgressive_Deposits_Eocene_Tallahatta_Formation_Southern_Alabama_USA https://www.researchgate.net/profile/John_Counts Related papers; Shipway, J.R., Altamia, M.A., Rosenberg, G., Concepcion, G.P., Haygood, M.G. and Distel, D.L., 2019. A rock-boring and rock-ingesting freshwater bivalve (shipworm) from the Philippines. Proceedings of the Royal Society B, 286(1905), p.20190434. https://www.researchgate.net/publication/333879933_A_rock-boring_and_rock-ingesting_freshwater_bivalve_shipworm_from_the_Philippines https://www.researchgate.net/profile/Reuben_Shipway Shipway, J.R., Rosenberg, G., Concepcion, G.P., Haygood, M.G., Savrda, C. and Distel, D.L., 2019. Shipworm bioerosion of lithic substrates in a freshwater setting, Abatan River, Philippines: Ichnologic, paleoenvironmental and biogeomorphical implications. PloS one, 14(10). https://www.researchgate.net/publication/336950278_Shipworm_bioerosion_of_lithic_substrates_in_a_freshwater_setting_Abatan_River_Philippines_Ichnologic_paleoenvironmental_and_biogeomorphical_implications https://www.researchgate.net/profile/Reuben_Shipway Yours, Paul H. 1 Link to comment Share on other sites More sharing options...
davidcpowers Posted March 17, 2020 Author Share Posted March 17, 2020 Hey thank you everyone for your help in Identifying these as Teredolites. Thanks @Oxytropidocerasfor the articles on these trace fossils. I now have some reading to do. Link to comment Share on other sites More sharing options...
GeschWhat Posted March 19, 2020 Share Posted March 19, 2020 Very cool find! Lori www.areallycrappystory.com/fossils www.facebook.com/fossilpoo Link to comment Share on other sites More sharing options...
Fischcrazy Posted August 19, 2020 Share Posted August 19, 2020 Very much Teredolites. Since they are Bearpaw you may want to read Kelly (1988). Borings produced by the tracemaker Turnus have similar morphologies to this and two fossil species are known from the area at that time (T. lacombi Mclearn and T. (goniochasma) crockfordi Warren). Link to comment Share on other sites More sharing options...
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