Glaciers sparked volcanism that harmed ocean health

Oxygen-deprived waters linked to volcanoes triggered by melting ice. Sediment records from Alaska, spanning the past 20,000 years, suggest that melting glaciers triggered volcanic episodes that removed oxygen in the northeastern Pacific Ocean, explaining 'dead zones' that lasted millennia.

Automated summary

The melting of glaciers triggered volcanic activities, resulting in oxygen-deprived waters in the northeastern Pacific Ocean that lasted for thousands of years.