NDLI: The Campanian-Maastrichtian stage boundary in the Aktulagai section (North Caspian depression)

Content Provider	Springer Nature Link
Author	Naidin, D. P. Beniamovski, V. N.
Copyright Year	2006
Abstract	Distribution of belemnites and benthic foraminifers in the Campanian-Maastrichtian boundary layers of the Aktulagai section, one of Upper Cretaceous reference sections in the east of the European paleobiogeographic region (EPR) is discussed. The base of Lanceolata Beds defined by A.D. Arkhangelsky in 1912 is well-substantiated biostratigraphic level corresponding to boundary between the Campanian and Maastrichtian stages. In spacious outcrops of Upper Cretaceous deposits in the Aktulagai Plateau (Aktyubinsk region, Kazakhstan Republic), “primitive Belemnella forms” (two rostra plates) appearing above that base distinctly replace the genus Belemnitella dominant in the Campanian. Seven successive zonal assemblages of benthic foraminifers (one plate) are established in the boundary interval. The Aktulagai reference section of Upper Cretaceous sediments can be used to trace the Campanian-Maastrichtian boundary from the eastern EPR to Boreal regions of Russia based on abundant micro-and nannofossils.
Starting Page	433
Ending Page	443
Page Count	11
File Format	PDF
ISSN	08695938
Journal	Stratigraphy and Geological Correlation
Volume Number	14
Issue Number	4
e-ISSN	15556263
Language	English
Publisher	Nauka/Interperiodica
Publisher Date	2006-01-01
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Campanian Maastrichtian boundary Aktulagai reference section North Caspian depression belemnites benthic foraminifers Historical Geology Structural Geology Geophysics/Geodesy Sedimentology Archaeology
Content Type	Text
Resource Type	Article
Subject	Geology Stratigraphy Paleontology

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