The Falterona-Vicchio succession outcropping in the Alta Val Marecchia area, shows peculiar stratigraphic and tectonic characters with respect to the Casentino to the northwest. Since the Aquitanian, the sedimentation of the Falterona Formation (a turbidite unit) is characterised, in the study area, by pelitic dominant lithofacies and reduced thickness. Lower Miocene volcanoclastic and cherty levels occur near the villages of Viamaggio and Caprile. New well data show the presence of volcanic rocks of the same age in an adjacent area to the southwest. A stratigraphic gap associated with an abrupt sedimentary facies change is documented in the sequence. Lower-Middle Serravallian pelitic-sandy to pelitic lithofacies closely resemble those of the Verghereto Marls cropping in northwestern sector of the study area. This suggests a connection between the Tuscan Domain and the more external Umbro-Marchean-Romagnan Domain of the Apennine foredeep, along an important transversal tectonic discontinuity corresponding to the Val Marecchia "Line'.
Considerazioni stratigrafiche e tettoniche sulla Successione Falterona-Vicchio nell'Alta Val Marecchia (Appennino Settentrionale)
DE DONATIS, MAURO
1993
Abstract
The Falterona-Vicchio succession outcropping in the Alta Val Marecchia area, shows peculiar stratigraphic and tectonic characters with respect to the Casentino to the northwest. Since the Aquitanian, the sedimentation of the Falterona Formation (a turbidite unit) is characterised, in the study area, by pelitic dominant lithofacies and reduced thickness. Lower Miocene volcanoclastic and cherty levels occur near the villages of Viamaggio and Caprile. New well data show the presence of volcanic rocks of the same age in an adjacent area to the southwest. A stratigraphic gap associated with an abrupt sedimentary facies change is documented in the sequence. Lower-Middle Serravallian pelitic-sandy to pelitic lithofacies closely resemble those of the Verghereto Marls cropping in northwestern sector of the study area. This suggests a connection between the Tuscan Domain and the more external Umbro-Marchean-Romagnan Domain of the Apennine foredeep, along an important transversal tectonic discontinuity corresponding to the Val Marecchia "Line'.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
