Magnetostratigraphic data on the upper Cretaceous of Tuarkyr (Turkmenistan) and their implications for the general paleomagnetic time scaleстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Авторы:
Guzhikov A.Yu a,
Molostovskii E.A.b,
Nazarov Kh c.,
Fomin V.A.b,
Baraboshkin E.Yu d ,
Kopaevich L.F.d
Журнал:
Izvestiya. Physics of the Solid Earth
Том:
39
Номер:
9
Год издания:
2003
Издательство:
Pleiades Publishing, Inc.
Местоположение издательства:
New York, USA
Первая страница:
728
Последняя страница:
740
Аннотация:
The Cenomanian-Campanian deposits of Tuarkyr (northwestern Turkmenistan) are studied magnetostratigraphically with a reliable paleontological control. Turonian-Campanian rocks possess a high paleomagnetic stability. The existence of a reversed polarity subzone in the middle Cenomanian and several reversals in the Turonian-Coniacian is confirmed. The Santonian-Campanian of the section is dominated by a reversed polarity. The results of the study point to an intricate magnetic zonation of the Cenomanian-Campanian and together with the analysis of data on the Upper Cretaceous of other regions, suggest the necessity of revising the Cenomanian-Campanian interval of the magnetostratigraphic time scale, which has been traditionally considered as an interval of a predominantly normal polarity. New data on the Cenomanian-Campanian geomagnetic field regime also suggest that geodynamic models relating the epoch of the quiet Cretaceous field to various geological events should possibly be reexamined. Copyright В© 2003 by MAIK "Nauka/Interperiodica" (Russia).
Добавил в систему:
Копаевич Людмила Федоровна