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Periodic changes in the Cretaceous ocean and climate caused by marine redox see-saw


"Periodic changes in sediment composition are usually ascribed to insolation forcing controlled by Earth’s orbital parameters. During the Cretaceous Thermal Maximum at 97–91 Myr ago (Ma), a 37–50-kyr-long cycle that is generally believed to reflect obliquity forcing dominates the sediment record.  [...]"

Source: Nature Geoscience
Authors: Klaus Wallmann et al.
DOI: 10.1038/s41561-019-0359-x

Read the full article here.