Stratigraphic analysis reveals high-amplitude geomagnetic variations in Cretaceous sections, indicating anomalous geomagnetic field behavior at the end of the Cretaceous normal superchron.
In 394 samples characterizing 266 stratigraphic levels in four Turonian–Santonian sections in the Southwestern Crimea, characteristic remanent magnetization components (ChRM) formed at the stage of diagenesis is identified. The data obtained represent the record of the Paleocene geomagnetic variations of high amplitude (rms deviation S = 25.9° with a fixed cut-off angle of 45°, which is about twice as high as the model S for this latitude) in the sediments formed in ~5–6 Ma and are interpreted as anomalous behavior of the geomagnetic field in the Turonian, Coniacian, and Santonian.
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Guzhikov et al. (2024) studied this question.
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