Journal Title
Title of Journal: Int J Earth Sci Geol Rundsch
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Abbravation: International Journal of Earth Sciences
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Publisher
Springer-Verlag
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Authors: Matthias Franz Matthias Henniger Jens Barnasch
Publish Date: 2012/10/16
Volume: 102, Issue: 3, Pages: 761-780
Abstract
The transition from the shallow marine Upper Muschelkalk Sea to the Lower Keuper fluvial plain represents the most diachronous facies shift of the entire Germanic Triassic The typesection of the fluvial Lower Keuper Erfurt Formation is described in detail for the first time including biostratigraphic dating of the Muschelkalk/Keuper boundary The typesection is integrated into a NNESSW cross section through the Central European Basin and the Muschelkalk/Keuper facies shift is constrained by highresolution conodont and ceratite biostratigraphy Thus the fundamental changes in palaeogeography shifts of facies belts and stratal pattern architecture are visualised Forced by a rapid transgression from Tethyan waters the shallow marine Upper Muschelkalk Sea attained its maximum flooding in the lower conodont zone 2 sequens/pulcher to philippi/robustus zones Subsequent slow continuous regression to the South was accompanied by stepbystep progradation of coastal to fluvial plain environments of the Lower Keuper culminating in a fluvial plain extending to South Germany Based on stratal patterns an improved sequencestratigraphic interpretation for the Upper Muschelkalk/Lower Keuper interval is suggested In combination with biostratigraphic arguments the new sequencestratigraphy points to a revised correlation of this interval within the Tethyan Triassic incorporating the positions of the Anisian/Ladinian and Fassanian/Longobardian boundariesWe acknowledge S Rein Erfurt for the determination of ceratites from Egstedter Trift K Obst LUNG MecklenburgVorpommern kindly provided access to the core repository of the geologic state survey of MecklenburgVorpommern G Bachmann MLU HalleWittenberg is thanked for helpful comments on an earlier version of this manuscript and A Szulc TU Bergakademie Freiberg for correcting the English H Kozur Budapest and J Szulc Krakau are acknowledged for careful reviews Parts of this research have been funded by the Deutsche Forschungsgemeinschaft Be 1652/1
Keywords:
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