The 1:25,000 geological map of the Colle di Tenda - Monte Marguareis area covers an area of about 130 km2 in the Italian Ligurian Alps, between the Vermenagna and Tanaro valleys. It is a detailed geological map of a sector of the Ligurian Alps of renewed scientific interest, and represents the eastern continuation of a recently published geological map of the Entracque- Colle di Tenda area. In addition to the increased detail and scale, the more relevant new contents of this map are represented by: (1) amapofallthetectonicelementsmakinguptheLimone-ViozeneZoneandtheRefreyUnit, which represent the south-eastern portion of a major regional transfer zone developed at the southern termination of the Western Alps arc; (2) the representation of km-scale Cretaceous palaeoescarpments previously overlooked or interpreted as Alpine faults; (3) a new interpretation of some dark shales with interbedded sandstones, which were previously mapped as Helminthoides Flysch tectonic remnants, as belonging to the Annot Sandstone unit, the uppermost term of the Alpine Foreland Basin succession; and (4) amaplegenddesignedfollowingthesamecriteriaofthe1:250,000MapofthePiemonte Region.
Geology of the Colle di Tenda - Monte Marguareis area (Ligurian Alps, NW Italy)
Piana Fabrizio
2018
Abstract
The 1:25,000 geological map of the Colle di Tenda - Monte Marguareis area covers an area of about 130 km2 in the Italian Ligurian Alps, between the Vermenagna and Tanaro valleys. It is a detailed geological map of a sector of the Ligurian Alps of renewed scientific interest, and represents the eastern continuation of a recently published geological map of the Entracque- Colle di Tenda area. In addition to the increased detail and scale, the more relevant new contents of this map are represented by: (1) amapofallthetectonicelementsmakinguptheLimone-ViozeneZoneandtheRefreyUnit, which represent the south-eastern portion of a major regional transfer zone developed at the southern termination of the Western Alps arc; (2) the representation of km-scale Cretaceous palaeoescarpments previously overlooked or interpreted as Alpine faults; (3) a new interpretation of some dark shales with interbedded sandstones, which were previously mapped as Helminthoides Flysch tectonic remnants, as belonging to the Annot Sandstone unit, the uppermost term of the Alpine Foreland Basin succession; and (4) amaplegenddesignedfollowingthesamecriteriaofthe1:250,000MapofthePiemonte Region.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
