The new study also finds fresh evidence for major volcanoes causing mass extinctions.
A slowing of continental plate movement may have been the critical event that drove some of Earth's most devastating extinction events, according to athat the new model debunks the generally held view that major volcanic events are linked to the 'upwelling' ofThe study also provides a fresh boost in evidence for volcanic events being the cause of past mass extinction events. Until now, such a connection has been extremely complicated to prove.
However, when the scientists compared the age of volcanic activity with models of plate reconstruction , they observed a co-occurrence. plume , but rather a slow-down in the velocity of the continental movement that allows the volcanic activity to happen.Modern-day volcanoes on land and on the seafloor release mercury into the atmosphere and oceans, respectively. It is hypothesized that a large volcanic event in Earth's past would have released a lot of Hg into Earth's surface environments.
"We analyzed the sedimentary layers [from the Karoo-Ferrar LIP] for their mercury content," Ruhl explains to IE.
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