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Racki, G., 2020, Volcanism as a prime cause of mass extinctions: Retrospectives and perspectives, in Adatte, T., Bond, D.P.G., and Keller, G., eds., Mass Extinctions, Volcanism, and Impacts: New Developments: Geological Society of America Special Paper 544, p. 1–34 https://www.researchgate.net/publication/337951571_Volcanism_as_a_prime_cause_of_mass_extinctions_Retrospectives_and_perspectives https://www.researchgate.net/profile/Grzegorz_Racki Racki, G., Rakociński, M., Marynowski, L. and Wignall, P.B., 2018. Mercury enrichments and the Frasnian-Famennian biotic crisis: A volcanic trigger proved?. Geology, 46(6), pp.543-546. https://www.researchgate.net/publication/326031821_Mercury_enrichments_and_the_Frasnian-Famennian_biotic_crisis_A_volcanic_trigger_proved Let's be careful out there, Paul H.

New evidence suggests volcanoes caused biggest mass extinction ever Mercury found in ancient rock around the world supports theory that eruptions caused 'Great Dying' 252 million years ago. University of Cincinnati, Science Daily, April 15, 2019 https://www.sciencedaily.com/releases/2019/04/190415122249.htm The open access paper is: Jun Shen, Jiubin Chen, Thomas J. Algeo, Shengliu Yuan, Qinglai Feng, Jianxin Yu, Lian Zhou, Brennan O’Connell, Noah J. Planavsky. Evidence for a prolonged Permian–Triassic extinction interval from global marine mercury records. Nature Communications, 2019; 10 (1) https://www.nature.com/articles/s41467-019-09620-0 Yours, Paul H.

Volcanic eruptions triggered dawn of the dinosaurs (Huge pulses of volcanic activity are likely to have played a key role in triggering the end Triassic mass extinction, which set the scene for the rise and age of the dinosaurs, new Oxford University research has found.) http://www.heritagedaily.com/2017/06/volcanic-eruptions-triggered-dawn-dinosaurs/115652 https://www.sciencedaily.com/releases/2017/06/170619151530.htm Dinosaurs got an evolutionary assist from huge volcanic eruptions by Mary Beth Griggs Popular Science http://www.popsci.com/volcanic-eruptions-dinosaur-evolution The paper is: Lawrence M. E. Percival, Micha Ruhl, Stephen P. Hesselbo, Hugh C. Jenkyns, Tamsin A. Mather, and essica H. Whiteside. Mercury evidence for pulsed volcanism during the end-Triassic mass extinction. PNAS, June 2017 DOI: 10.1073/pnas.1705378114 http://www.pnas.org/content/early/2017/06/13/1705378114 Yours, Paul H.