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Paleomagnetic study of Cretaceous sediments from DSDP Hole 391C shows numerous intervals of reversed polarity occurring within the Lower Cretaceous. When these results are combined with those from DSDP sites from Legs 40,41, and 43, they allow us to construct a reversal sequence for the Cretaceous system. The results indicate that mixed polarity occurs in Maestrichtian sediments, normal polarity predominates in lower Campanian to upper Albian sediments, and mixed polarity characterizes the remainder of the Cretaceous system.

Paleomagnetic Results from DSDP Hole 391C and the Magnetostratigraphy of Cretaceous Sediments from the Atlantic Ocean Floor