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Guzhikov A.Yu., Baraboshkin E.Yu., Aleksandrova G.N., Ryabov I.P., Ustinova M.A., Kopaevich L.F., Mirantsev G.V., Kuznetsov A.B., Fokin P.A., Kosorukov V.L. (2021) New Bio-, Chemo-, and Magnetostratigraphy of the Santonian–Campanian Boundary in the Kudrino and Aksu-Dere Sections (SW Crimea): Problems of Global Correlation and Selection of the Lower Boundary Stratotype of the Campanian. 2. Magneto- and Chemostratigraphy, Discussion // Stratigraphy and Geological Correlation. Vol. 29. No. 5. Pp. 27–58.

The paper continues a complex study of the Santonian–Campanian boundary of the Aksu-Dere and Kudrino-2 sections (Bakhchisarai region, Southwestern Crimea), the sedimentological and biostratigraphic data on which are provided in paper 1. This work presents the paleomagnetic, rock magnetic, and geochemical data on C and O stable isotopes. The 87Sr/86Sr values of limestones increase upward the section: from 0.70741 to 0.70752 in Aksu-Dere and from 0.70750 to 0.70755 in Kudrino-2. on the basis of the results, the outcrops are correlated and the Kudrino–Aksu-Dere composite section is compilled, in which we identified paleontological, paleomagnetic, and isotopic markers necessary for the identification of the Santonian–Campanian boundary. The biostratigraphic boundaries are calibrated against the geomagnetic reversal 34n–33r and the SCBE isotopic event; thus, the base of the Campanian Stage should be determined by the base of the Chron 33r. In the volume of the geological record of the Santonian–Campanian boundary, saturation in guide fossil forms, and complex study, the composite section matches the candidates for a Global Boundary Stratotype Section and Point of the Campanian in North Texas and Southern England. This allows us to propose it as one of the candidates of the stratotype or an auxiliary section of the lower boundary of the Campanian Stage.

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