From the abstract of the paper linked in the article: "A full-scale OAE would take thousands of years to develop, but some of today's processes are reminiscent

From the abstract of the paper linked in the article: "A full-scale OAE would take thousands of years to develop, but some of today's processes are reminiscent of those thought to have promoted OAEs in the distant past." (OAE = oceanic anoxic event) https://www.science.org/doi/10.1126/science.aaj2321 https://www.science.org/doi/10.1126/science.aaj2321