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Oxytropidoceras posted a topic in Fossil NewsMercury Rising: New evidence that volcanism triggered the late Devonian extinction, Geological Society of America, May 1, 2018 https://www.sciencedaily.com/releases/2018/05/180501161805.htm Volcanic Eruptions Led to Mass Extinction 370 Million Years Ago http://www.sci-news.com/geology/volcanic-eruptions-late-devonian-mass-extinction-05967.html The abstract is: Grzegorz Racki, Michał Rakociński, Leszek Marynowski, Paul B. Wignall. Mercury enrichments and the Frasnian- Famennian biotic crisis: A volcanic trigger proved? Geology, 2018; DOI: 10.1130/G40233.1 https://pubs.geoscienceworld.org/gsa/geology/article-abstract/530692/mercury-enrichments-and-the-frasnian-famennian Related papers are: Courtillot, V., Kravchinsky, V.A., Quidelleur, X., Renne, P.R. and Gladkochub, D.P., 2010. Preliminary dating of the Viluy traps (Eastern Siberia): Eruption at the time of Late Devonian extinction events?. Earth and Planetary Science Letters, 300(3-4), pp. 239-245. https://sites.ualberta.ca/~vadim/Publications-Kravchinsky.htm https://sites.ualberta.ca/~vadim/Publications-Kravchinsky_files/2010-Courtillot et al - Preliminary dating of the Viluy traps.pdf Kravchinsky, V.A., 2012. Paleozoic large igneous provinces of Northern Eurasia: correlation with mass extinction events. Global and Planetary Change, 86, pp. 31-36. https://sites.ualberta.ca/~vadim/Publications-Kravchinsky.htm https://sites.ualberta.ca/~vadim/Publications-Kravchinsky_files/2012-Kravchinsky - Paleozoic large igneous provinces of Northern Eurasia- Correlation with mass extinction events.pdf Ricci, J., Quidelleur, X., Pavlov, V., Orlov, S., Shatsillo, A. and Courtillot, V., 2013. New 40Ar/39Ar and K–Ar ages of the Viluy traps (Eastern Siberia): further evidence for a relationship with the Frasnian–Famennian mass extinction. Palaeogeography, Palaeoclimatology, Palaeoecology, 386, pp. 531-540. http://paleomag-ifz.ru/en/articles?page=1 http://www.paleomag-ifz.ru/sites/default/files/articles/ricci_et_al.pdf Carmichael, S.K., Waters, J.A., Batchelor, C.J., Coleman, D.M., Suttner, T.J., Kido, E., Moore, L.M. and Chadimová, L., 2016. Climate instability and tipping points in the Late Devonian: detection of the Hangenberg Event in an open oceanic island arc in the Central Asian Orogenic Belt. Gondwana Research, 32, pp. 213-231. https://pdfs.semanticscholar.org/270e/8f86bcc9677b802e049640d2dc8f8ab01652.pdf Yours, Paul H.
Dear Guys, Today found one erratic in gravel and when I splited it I found this leaf like imprint. It is 3 cm length. By the shape I would say it is from big clubmoss but I very need more opinions, maybe it is possible to identify genus or family? Any help will be appreciated! Best Regards Domas
Hi All, This is my first post in the forums, but probably won't be my last... I'm trying to write a kids book on evolution and want to draw some nice pictures to go with the rhymes (it's aimed at younger kids). However for the page I have written about Tiktaalik roseae I would like to do a picture of it resting on the bank of a river, with some of the likely associated flora and fauna that lived in the margins of freshwater at the time hanging out in the background/foreground (probably foreground as I suspect they were all fairly small). Unfortunately there don't seem to be a lot of good fossils from the Famennian in Canada at this time and so I was wondering if anyone would be able to help me identify some likely candidates. There is a lot of information on the tetrapods that lived with it but it seems like nobody has covered the land living/marginal species that may have crossed paths with it. There is also some info about things like e.g. Archaeopteris, Gigantocharinus, Microdecemplex, etc. but none of them seem to occur in the same location/stratigraphy. Hopefully the way I have written this doesn't make me sound completely clueless (although chances are good), as it's been a while since I've dabbled in palaeontology, but if anyone wants further clarification then let me know. Thanks in advance, this is a great website, by the way! Cheers SpoonMan