Drill core reveals asynchronous land–ocean responses to ancient ocean anoxia
Phys.org
March 4, 2026
Earth experienced a period of intense, large-scale volcanism during the early Aptian. Around that time, it also experienced widespread ocean deoxygenation during the Oceanic Anoxic Event 1a (OAE1a) as well as the onset of a period of unusual stability in Earth's magnetic field, known as the Cretaceous Normal Superchron (CNS), which lasted about 38 million years.
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Originally published on Phys.org on 3/4/2026