Flysch del Varesotto
Back to South AlpineRepresentation and status
- Color RGB
- R: 190 G: 190 B: 110
- Rank
- lithostratigraphic Formation
- Validity
- Unit is in Use
- Status
- informal term
Nomenclature
- Deutsch
- Varesotto-Flysch
- Français
- Flysch du Varesotto
- Italiano
- Flysch del Varesotto
- English
- Varesotto Flysch
- Origin of the Name
- Historical Variants
-
Basis des Flysches im Mendrisiotto (Vonderschmitt 1938), Untere Flysch mit Globotruncana appenninica (Vonderschmitt 1941), flysch conglomeratico ed arenaceo (Gnaccolini 1968), Flysch gris = Flysch del Varesotto (Aubouin et al. 1970, Bernoulli et al. 2018), Varesotto Flysch = Flysch del Varesotto (Bichsel & Haering 1981)
Components
Lithoklasten aus: Maiolica, Radiolarit, Lias-Kieselkalk
Globigerinen, Radioldarien, Globotruncanen (Gl. appenninica Renz), Orbitolinen (O. conoidea Gras)
Hierarchy and sequence
- Superordinate unit
- Units at roof
- Units at floor
Age
- Age at top
-
- Early Santonian
- Age at base
-
- Late Cenomanian
Geography
- Geographical extent
- Lombardia nord-occidentale e Ticino (Varesotto, Mendrisiotto).
Palaenography and tectonic
-
- Südalpine Flysche
- Tectonic unit (resp. main category)
- Kind of protolith
-
- sedimentary
- Conditions of formation
-
facies di piana di bacino (Bichsel & Haering 1981)
References
- Definition
-
(1981) :
Facies evolution of Late Cretaceous flysch in Lombardy (northern Italy). Eclogae geol. Helv. 74/2, 383–420
p. 389: This formation was described by Gnaccolini (1968) as "flysch conglomeratico ed arenaceo". Aubouin et al. (1970) subdivided the formation into three levels:
"flysch calcaro-pélitique", "complexe à calcaires blancs", "série flyschoïde à dominante
calcaro-pélitique-gréseuse". The lower limit of the Varesotto Flysch lies in the
Upper Cenomanian, the upper boundary is not exposed. The age of the onset of the
390 M. Bichsel and M.O. Häring
flysch sedimentation for the Breggia section (section 7, p. 398; Fig. 1, C) is based on
Premoli Silva & Luterbacher (1965) and on our own data. The formation is
composed by the following lithologies: