From Science Daily
Around 250 million years ago, at the end of the Permian period, there was a mass extinction so severe that it remains the most traumatic known species die-off in Earth’s history. Some researchers have suggested that this extinction was triggered by contemporaneous volcanic eruptions in Siberia. New results from a team including Director of Carnegie’s Department of Terrestrial Magnetism Linda Elkins-Tanton show that the atmospheric effects of these eruptions could have been devastating.
B. A. Black, J.-F. Lamarque, C. A. Shields, L. T. Elkins-Tanton, J. T. Kiehl. Acid rain and ozone depletion from pulsed Siberian Traps magmatism. Geology, 2013; DOI: 10.1130/G34875.1