Existence of the Reversal Polarity Zones in Turonian-Coniacian from the Lower Volga (Russia): New Data
2018; Springer International Publishing; Linguagem: Inglês
10.1007/978-3-319-90437-5_25
ISSN2364-9119
AutoresА. А. Гужикова, A. Yu. Guzhikov, Е. М. Первушов, I. P. Ryabov, A. M. Surinskiy,
Tópico(s)Geological Formations and Processes Exploration
ResumoThe detailed magnetostratigraphic study of the Turonian-Coniacian sections from the Volga right-bank region was conducted. The results on magnetic polarity from the Nizhnyaya Bannovka section (Saratov Region) (about 18 m thick) agree with the traditional data on exclusively normal regime of geomagnetic field polarity in the Cenomanian-Santonian ages. In the Kamennyi Brod section (Volgograd Region) between two zones of normal polarity an interval (about 16 m thick) occurs with no reliable paleomagnetic data due to extremely low magnetization of rocks. In the composite section Ozerki-Lipovka (Saratov Region) a long (thickness not less than 13 m) zone of reverse polarity is recorded. This contradicts the paleomagnetic structure as established in the Geomagnetic Polarity Time Scale (Ogg et al. 2016) but is partly consistent with the General Magnetostratigraphic Scale (Supplements … 2000) which records existence of a prolonged reversed-polarity epoch (R) in the Coniacian age (the Klyuyevskaya R-zone).
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