Northwestern University: Tiny Fossils Crack a Cretaceous Cold Case
July 31, 2026
July 31, 2026
EVANSTON, Illinois, July 31 (TNSjou) -- Northwestern University posted the following news release:
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Tiny fossils crack a Cretaceous cold case
Ancient ocean acidification triggered one of the ocean's most severe extinctions
* Calcium isotopes in fossilized shells show ocean acidification caused the extinction event
* Massive volcanic eruptions released CO2 into the atmosphere, acidifying seawater
* Fifth North . . .
* * *
Tiny fossils crack a Cretaceous cold case
Ancient ocean acidification triggered one of the ocean's most severe extinctions
* Calcium isotopes in fossilized shells show ocean acidification caused the extinction event
* Massive volcanic eruptions released CO2 into the atmosphere, acidifying seawater
* Fifth North . . .