“There were just a small fraction that survived into this post-extinction world,” Siebert said.
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" "So far, the cause of this die-off remains unknown. There were no significant climatic changes in the early Miocene, and there’s no evidence of an asteroid impact around that time.
“We have no idea,” Sibert said.
“It’s a fascinating mystery,” Rubin added.
Sharks never fully recovered from this incident...
Sharks Almost Went the Way of the Dinosaurs 19 Million Years Ago
Extinctions that obliterate wide swathes of life have reshaped Earth’s history. Typically triggered by a massive environmental change — like an asteroid impact or a significant shift in climate — these events give scientists an intimate look at how life recovers after a cataclysm. Researchers...
'Million dollar question': Study uncovers mysterious shark species extinction 19 million years ago
A new study has found that shark populations experienced more than a 70 per cent decline nearly 19 million years ago, a rate of extinction nearly two times that of the extinction that occurred during the time of the dinosaurs.
" "So far, the cause of this die-off remains unknown. There were no significant climatic changes in the early Miocene, and there’s no evidence of an asteroid impact around that time.
“We have no idea,” Sibert said.
“It’s a fascinating mystery,” Rubin added.
Sharks never fully recovered from this incident...
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