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Disappearance of the Dinosaurs
Neil C. Koch
Journal of Paleontology
Vol. 41, No. 4 (Jul., 1967), pp. 970-972
Published by: SEPM Society for Sedimentary Geology
Stable URL: http://www.jstor.org/stable/1302167
Page Count: 3
You can always find the topics here!Topics: Selenium, Shales, Dinosaurs, Animals, Plants, Toxicity, Vegetation, Forest soils, Paleontology, Species extinction
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Selenium may have been the main cause for the extinction of dinosaurs and other animal species at the end of the Mesozoic Era. Selenium was deposited throughout the world from volcanic lava and gases in Mesozoic time. The decay of selenium-bearing rocks probably produced seleniferous vegetation. These toxic plants were eaten by the herbivorous dinosaurs, whereas the meat-eating animals were slowly poisoned by the selenium ingested and retained in the fatty tissue and bones of foraging animals.
Journal of Paleontology © 1967 SEPM Society for Sedimentary Geology