Thibault, Nicolas; Harlou, Rikke; Schovsbo, Niels; Schioler, Poul; Minoletti, Fabrice; Galbrun, Bruno; Lauridsen, Bodil W.; Sheldon, Emma; Stemmerik, Lars; Surlyk, Finn (2012): Upper Campanian-Maastrichtian nannofossil biostratigraphy and high-resolution carbon-isotope stratigraphy of the Danish Basin; towards a standard delta (super 13) C curve for the Boreal Realm. Elsevier, United Kingdom, Cretaceous Research, 33 (1), 72-90, georefid:2012-076524

High-resolution carbon isotope stratigraphy of the upper Campanian-Maastrichtian is recorded in the Boreal Realm from a total of 1968 bulk chalk samples of the Stevns-1 core, eastern Denmark. Isotopic trends are calibrated by calcareous nannofossil bio-events and are correlated with a lower-resolution delta (super 13) C profile from Rordal, northwestern Denmark. A quantitative approach is used to test the reliability of Upper Cretaceous nannofossil bio-events and provides accurate biohorizons for the correlation of delta (super 13) C profiles. The Campanian-Maastrichtian boundary (CMB) is identified through the correlation of dinoflagellate biostratigraphy and delta (super 13) C stratigraphy between Stevns-1 and the Global boundary Standard Stratotype-section and Point at Tercis les Bains (SW France), allowing the identification of new chemical and biostratigraphic markers that provide a precise placement of the stage boundary on a regional scale. The boundary interval corresponds to the third phase of a stepwise 0.8 ppm negative delta (super 13) C excursion, lies in calcareous nannofossil subzone UC16d (super BP) , and encompasses the last occurrence of nannofossil Tranolithus stemmerikii and first occurrence of nannofossil Prediscosphaera mgayae. Fifteen delta (super 13) C events are defined and correlated to sixteen reliable nannofossil biohorizons, thus providing a well-calibrated standard high-resolution delta (super 13) C curve for the Boreal Realm. Abstract Copyright (2012) Elsevier, B.V.
West: -1.0600 East: 12.2700 North: 57.0343 South: 43.4000
West: NaN East: NaN North: NaN South: NaN
Expedition: 74
Site: 74-525
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