Study of ancient rocks suggests oxygen depletion in oceans led to end-Triassic mass extinction

Study of ancient rocks suggests oxygen depletion in oceans led to end-Triassic mass extinction Simplified paleogeographical map for Triassic-Jurassic transition showing localities for all three studied sections. Credit: Science Advances (2020). DOI: 10.1126/sciadv.abb6704

A team of researchers from the U.K., China, and Italy has found evidence that suggests oxygen depletion in the world’s oceans led to the end-Triassic mass extinction. In their paper published in the journal Science Advances, the group describes their study of ancient rocks found in multiple locations around the world.


Prior research has shown that approximately 201.3 million years ago, a massive die-off of species occurred, ending the Triassic period and starting the Jurassic. Scientists have argued over the reason for the die-off and have settled on two possibilities: volcanic activity and ocean anoxia (loss of dissolved oxygen in the water). In this new effort, the researchers searched for evidence of the later.

The work involved obtaining

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