MAGNETOSTRATIGRAPHY OF THE MAYERLING SECTION (AUSTRIA) AND ERENKOLU-MEZARLIK (TURKEY) SECTION - IMPROVEMENT OF THE CARNIAN (LATE TRIASSIC) MAGNETIC POLARITY TIME-SCALE

We present a magnetostratigraphic study of two Carnian (late Triassic) pelagic limestone sections from the Northern Calcareous Alps (Mayerli ng section) and southwestern Turkey (Erenkolu Mezarlik section). Biost ratigraphic control is based on conodont zonation for the Mayerling se ction, and both on conodonts and ammonoids for the Erenkolu Mezarlik s ection. In both sections, the characteristic magnetization is essentia lly carried by a mineral of the magnetite family. Eight magnetic inter vals are obtained from the Mayerling section and fourteen from Erenkol u Mezarlik. When these results are compared to the Carnian magnetostra tigraphic sequence obtained from the Bolucektasi Tepe section, satisfa ctory correlations are observed and a composite Carnian magnetic polar ity time scale containing 24 intervals can be proposed by combining al l these results. The lower part of the upper Carnian is however missin g (Tuvalian 1 zone and lower part of the Tuvalian 2 zone). No clear co rrelation is observed between our composite sequence and the other pub lished magnetostratigraphic data of Carnian age. The satisfactory corr elation observed between the Mayerling and the Bolucektasi Tepe sectio ns indicates that both sections were deposited in the northern hemisph ere, thus providing constraints on the origin of the Antalya nappes.