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Mystery Event Decimated 90 Per Cent of Shark Diversity 19 Million Years Ago, New Study Finds
Researchers say this unidentified event caused a reduction in shark diversity by over 70 percent and almost a complete loss in total abundance By Edited by Gadgets 360 Newsdesk | Updated: 5 June 2021 12:33 IST
Photo Credit: Pixabay
Highlights
It led to the virtual disappearance of sharks from open-ocean sediments
The cause of the event is still a mystery
A new study has found that a single mysterious event about 19 million years ago wiped nearly the entire population of sharks. Scientists behind the new research say that studying the shark teeth buried in deep-sea sediment, revealed that the current diversity among sharks is only a tiny remnant of a much larger variety that existed back then. They say this unidentified major ocean extinction caused the reduction in the shark diversity by over 70 percent and nearly a complete loss in total abundance. Th
An extinction event about 19 million years ago decimated shark populations by up to 90%, researchers say.
In a paper published Thursday in the journal Science, Yale University oceanographer and paleontologist Elizabeth Sibert and Leah Rubin, then an undergraduate student at the College of the Atlantic in Bar Harbor
, Maine, wrote that shark populations have still not recovered from the abrupt die-off.
By studying shark teeth and other marine microfossils buried in deep-sea Pacific sediment, the pair reportedly found that current shark diversity was just a small remnant of a much larger array of forms eliminated by the Miocene-era extinction.
Sibert told Fox News via email on Saturday that she and Rubin had discovered the event entirely by accident.
In a new study led by Earth scientists at Yale University and the College of the Atlantic, researchers have discovered a massive shark extinction that occurred roughly 19 million years ago