Scientists are using seismic waves to scan the inside of our planet. - NBCNewsMACH
Her research has found detailed connections between the African blob and the La Reunion mantle plume that unleashed a wave of eruptions in what is now India 67 million years ago, delivering a one-two punch with the big asteroid impact to kill off the dinosaurs.. “There’s a high correlation between these events, climate changes and mass extinctions over the past few hundred million years,” Tsekhmistrenko says.
Sanne Cottaar, a University of Cambridge geophysicist who has mapped the blobs extensively, thinks they’re masses of high-density rock that. “They sit on top of the hotter core and will thus heat up over time. The heat then makes them less dense,” she said in an email.
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