Integrated stratigraphy across the Jurassic–Cretaceous boundary in the Rettenbacher section (Northern Calcareous Alps, Salzburg, Austria)

Rettenbacher Quarry carbonate sequence in the Northern Calcareous Alps represents highly dynamic pelagic carbonate sedimentation in the lower slope environment. The section spans from upper Tithonian Crassicollaria colomi Subzone to middle Berriasian Calpionella elliptica Subzone. Radiolarian sample...

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Bibliographic Details
Published in:	Cretaceous research Vol. 158; p. 105854
Main Authors:	Elbra, T., Skupien, P., Bubík, M., Košťák, M., Molčan Matejová, M., Pruner, P., Reháková, D., Švábenická, L., Vaňková, L., Cígler, V., Geist, J., Kdýr, Š., Lukeneder, A., Rybová, P., Mazuch, M., Schnabl, P., Svobodová, A., Trubač, J., Ucar, H.
Format:	Journal Article
Language:	English
Published:	Elsevier Ltd 01-06-2024
Subjects:	Biostratigraphy C–O stable isotopes Jurassic-Cretaceous boundary Magnetic properties Northern Calcareous Alps Northern Calcareous Alps Jurassic-Cretaceous boundary C–O stable isotopes Biostratigraphy Magnetic properties
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Summary:	Rettenbacher Quarry carbonate sequence in the Northern Calcareous Alps represents highly dynamic pelagic carbonate sedimentation in the lower slope environment. The section spans from upper Tithonian Crassicollaria colomi Subzone to middle Berriasian Calpionella elliptica Subzone. Radiolarian samples belong to Pseudodictyomitra carpatica Zone. Considerable redeposition of calpionellids, organic walled dinoflagellate cysts, calcareous nannofossils and foraminifera in the allodapic layers, as well as extensive normal polarity remagnetisation event with substantial clockwise rotation is documented. Quantitative predominance of genera Watznaueria and Cyclagelosphaera indicate strong nannofossil modification during diagenesis. The almost straight trend in the δ13C with some slight carbon-isotope perturbations is recorded at Rettenbacher. Three significant and stratigraphically important negative excursions of the δ13Ccarb values were identified — including tentative indication of a new “Negative peak 4” in the upper part of the Elliptica Subzone — and correlated with other sections confirming stability, respectively isochronity within carbon chemostratigraphy. •Upper Tithonian to middle Berriasian biostratigraphy and bioevents.•Sequence represents dynamic pelagic carbonate sedimentation in lower slope setting.•A new “Negative peak 4” of the δ13Ccarb values in the upper part of Elliptica Sbz.•Extensive normal polarity remagnetisation event with substantial clockwise rotation.
ISSN:	0195-6671 1095-998X
DOI:	10.1016/j.cretres.2024.105854