Zeitskala für Perm und Trias in der Stratigraphischen Tabelle von Deutschland 2002, zyklostratigraphische Kalibrierung der h?heren Dyas und Germanischen Trias und das Alter der Stufen Roadium bis Rhaetium 2005

摘要

For the timespan from 300 Ma to 200 Ma the numerical ages for the 17 global stages Gzhelian to Rhaetian and the five groups Rotliegend, Zechstein, Buntsandstein, Muschelkalk and Keuper of the Central European standard succession are estimated by means of integrated isotope-geochronometric data, weigthed average thicknesses, orbitally tuned sedimentary cycles and biostratigraphic and magnetostratigraphic correlations.For the Stratigraphische Tabelle von Deutschland 2002 (STD 2002), 230 time slices, bundled into 33 quasi isochronous "Folgen", are established. In the STD 2002 the latter have been estimated to have between ca. 0.5 m.y. and ca. 3.5 m.y. (rounded to 0.5 m.y.) durations using cycles of ca. 0.4 m.y. or ca. 0.1 m.y. duration. However, there are still significant possibilities for improved calibrations. A duration of ≥0.5 m.y. is proposed for large gaps in the Rotliegend and Keuper.