PERMIAN TO EARLY TRIASSIC MAGNETOSTRATIGRAPHY FROM THE CENTRAL-EUROPEAN BASIN IN POLAND - IMPLICATIONS ON REGIONAL AND WORLDWIDE CORRELATIONS

Permian-Early Triassic rocks sampled in 15 outcrops (93 hand samples) and 11 unoriented boreholes (630 hand samples) from the Polish part of the Central European Basin were studied paleomagnetically. In spite o f extensive remagnetization, affecting 50% of samples from the borehol es, a magnetic polarity sequence was compiled. The polarity pattern is not only common for many sections from the investigated area but also convergent with the global synthetic magnetostratigraphic scale. The Lower Rotliegend (Early Permian) rocks contain a reversed polarity rec ord, while the Upper Rotliegend (Late Permian)-Early Triassic sediment s are characterized by mixed polarity magnetization. Within the Buntsa ndstein part of that mixed megazone 14 magnetic zones were found. Bunt sandstein sedimentation started with a normal polarity zone, which may be compared with that of Early Griesbachian defined in several places in the world. The polarity record noted in the Middle Buntsandstein s ediments could indicate significant stratigraphic gaps or condensation s near the Middle Buntsandstein and Rot boundary. The comparison of th e Upper Buntsandstein polarity with the Early-Middle Triassic magnetos tratigraphic data from other basins suggests that the majority or even all the Rot sediments should be included in the Anisian. (C) 1997 Els evier Science B.V.