ArticleScientific reports2026
A novel chronostratigraphic framework for the Aptian-Albian paleoclimate events.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The Aptian-Albian interval was marked by paleoclimatic changes encompassing volcanic events and monsoonal activity of which the precise timing were not well-defined. This study presents a ~ 20 Myr cyclostratigraphic framework and provides an extended astronomical timescale using magnetic susceptibility and anhysteretic remanent magnetization datasets from the Poggio le Guaine core (Umbria-Marche Basin, Italy). Using astronomical tuning, we infer new age constraints and timespans for: (1) the Aptian and Albian stages; (2) the magnetic polarity Chron M0r; (3) the Oceanic Anoxic Events; (4) bioevents and, (5) Cretaceous oceanic red beds. These results enhance our understanding of the interplay between paleoclimatic and biotic processes in the Early Cretaceous. This study establishes a new chronostratigraphic framework for the Aptian-Albian-the most comprehensive to date in terms of resolution, integration with other geochronological methods, and temporal coverage- offering new insights into bio-chemical-geomagnetic interactions and helping refine the Geological Time Scale.
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