title: Nannofossil biostratigraphy, strontium and carbon isotope stratigraphy, cyclostratigraphy and an astronomically calibrated duration of the Late CampanianRadotruncana calcarataZone.
abstract: A section from the southern (Austro-Alpine Northern Calcareous Alps) margin of the Penninic Ocean in the NW Tethys realm of Late Campanian age is investigated stratigraphically. Plankton foraminifer and nannofossil biostratigraphy designate the presence of theGlobotruncana ventricosaZone and theRadotruncana(Globotruncanita)calcarataZone, and standard nannofossil zones CC21-UC15cTPand CC22ab-UC15deTP. The combination of carbon isotope stratigraphy, strontium isotopes, and cyclostratigraphy allows a detailed chronostratigraphic correlation. Periodicity was obtained by power spectral analysis, sinusoidal regression, and Morlet wavelets. The duration of thecalcarataTotal Range Zone is calculated by orbital cyclicity expressed in thickness data of limestone-marl rhythmites and stable carbon isotope data. Precessional, obliquity, and short and long eccentricity cycles are identified and give an extent of c. 806 kyr for the zone. Mean sediment accumulation rates are as low as 1.99 cm/kyr and correspond well to sediment accumulation rates in similar settings. We further discuss chronostratigraphic implications of our data.
authors.affiliation: University of Vienna, Department of Geodynamics and Sedimentology, Althanstrasse 14, 1090 Wien, Austria.
authors.forename: Michael
authors.initials: M
authors.lastname: Wagreich
authors.affiliation: University of Vienna, Institute of Paleontology, Althanstrasse 14, 1090 Wien, Austria.
authors.forename: Johann
authors.initials: J
authors.lastname: Hohenegger
authors.affiliation: University of Vienna, Department of Geodynamics and Sedimentology, Althanstrasse 14, 1090 Wien, Austria.
authors.forename: Stephanie
authors.initials: S
authors.lastname: Neuhuber
keywords: Calcarata Zone; Campanian; Carbon stable isotopes; Cyclostratigraphy; Nannofossil