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Central Mediterranean and Carpathians |
1 Dipartimento di Scienze Geologiche, Terza Università, Via Ostiense, 169-00154 Roma, Italy
2 Centre des Faibles Radioactivities CNRS-CEA, 91198 Gif sur Yvette, France
3 Istituto Nazionale di Geofisica, Via di Vigna Murata, 605-00143 Roma, Italy
This is an extended abstract which discusses palaeomagnetic results from Neogene formations in the Tyrrhenian margin of northern and central Italy. These data have been previously published by Sagnotti et al. (1994) and Mattei et al. (1995b).
Palaeomagnetic data have been widely used in reconstructing the geodynamic evolution of the Central Mediterranean. The pioneering research mainly focused on the tectonic interpretation of palaeomagnetic results from Jurassic to Eocene limestone formations from the Umbria-Marche Apennines (Lowrie & Alvarez 1974; Channell & Tarling 1975; Channell et al. 1978; VandenBerg et al. 1978). These studies identified a counterclockwise rotation which was believed to extend across the entire Italian peninsula. This rotation was subsequently identified in coeval formations from other sectors of the ‘Adriatic Promontory’ (e.g. Márton & Veljovic 1983; VandenBerg 1983; Lowrie 1986). The age of the rotation was initially defined as Mesozoic-Early Cenozoic. The quality and consistency of these data led to their widespread incorporation into geodynamic models for the Neogene evolution of the peninsula. In many models (e.g. Hill & Hayward 1985; Sartori 1990; Doglioni 1991; Castellarin et al. 1992), the counterclockwise rotation of the Mesozoic and Early Cenozoic formations was assumed to have occurred during the post-Mid-Miocene opening of the Tyrrhenian Sea (to the west) and to have affected all the geodynamic provinces of the Italian peninsula. In the last few years, however, structural and stratigraphic studies (summarized in CNR 1989) have shown that the main tectonic events in the peninsula took place in the Late Miocene to Pleistocene time
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This 250-word extract was created in the absence of an abstract.
