Dictionary of Human Evolution and Biology

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Emiliani-Shackleton Glacial Sequence

Replacement for the old four-cycle Alpine glacial sequence; recently (1955-73) modified and extended using oxygen isotope ratios in deep-sea cores. The new V28-238 deep-sea core sequence contains eight major cycles for the most recent 730 ky (the Brunhes normal epoch), or the late and middle Pleistocene; the early Pleistocene (1.6 mya to 730 kya, Matuyama reversed epoch) contains twenty shorter cycles. Aka world oxygen isotope stage column, marine oxygen isotope chronology.

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