The German Stratigraphic Commission recommends the use of the new stratigraphic classifications of the Permian and Triassic units of Germany

After the re-unification of Germany on October 3rd 1990, the Subkommission Perm-Trias (SKPT) of the German Stratigraphic Commission passed recommendations on 70 applications concerning stratigraphic nomenclature, classification (rank), subdivision of stratigraphic units and items of procedure in Central Europe. Here, the most important 33 of these recommendations are documented, with some additional explanations. A full list of recommendations can be found on the website www.stratigraphie.de/Perm-Trias. The stratigraphic systems of the Federal Republic of Germany and the German Democratic Republic differed significantly and they have now been aligned with each other and with the International Stratigraphic Guide (ISG 1976, 1994). The 33 resolutions given here are listed in five groups by ascending stratigraphic order - Rotliegend, Zechstein, Buntsandstein, Muschelkalk and Keuper - irrespective of when the resolutions were passed. For each unit, the listings include the lower boundary, rank (classification), subdivisions and the results of the voting. Figures are provided to illustrate the position and rank of the stratigraphic units mentioned. After a final resolution fixing the lower boundary of the Rotliegend in 2006, the two groups of the Dyas (Rotliegend and Zechstein = Central European Permian) and the three Germanic Trias groups (Buntsandstein, Muschelkalk and Keuper = Central European Triassic) are now firmly established. The boundaries between the five groups, and those separating the numerous formations within them, are quasi-iso-chronous across large parts of the Central European Basin (Germanic Basin). This is an extremely valuable geochronological component of the stratigraphy, and to make it fully accessible, the German Stratigraphic Commision has defined 33 Folgen (intervals) as regional geochronological units (RGU) after thorough discussions.