Fossilized oysters hold key to mass extinction: Study finds event triggered by ocean pH drop

PHYSorg
Jul 14, 2025, 12:50 pm93 pts
In the first and only reconstruction of ocean pH ever carried out, new research from the University of St Andrews and the University of Birmingham has discovered that a rapid acidification of oceans, due to a massive and sudden rise in atmospheric CO2, caused a mass extinction event 201 million years ago.

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