Calcare dolomitico di Lessolo
Back to Canavese zoneRepresentation and status
- Color CMYK
- (0%,0%,0%,100%)
- Color RGB
- R: 250 G: 175 B: 50
- Rank
- lithostratigraphic unit
- Validity
- Unit is in Use
- Status
- local name (informal)
Nomenclature
- Deutsch
- Lessolo-Kalk
- Français
- Calcaire dolomitique de Lessolo
- Italiano
- Calcare dolomitico di Lessolo
- English
- Lessolo Dolomitic Limestone
- Origin of the Name
-
Cava Dagasso e Cava Pistono, Lessolo (Italia), E Ivrea
- Historical Variants
-
--- ([Issel 1893, Spitz 1919, Novarese 1929, Baggio 1965a/b, Elter et al. 1966, Ahrendt 1972, Wozniak, 1977), Triassic dolostone (Biino & Compagnoni 1989), dolomitic limestone (Borghi et al. 1996)
Age
- Age at top
-
- Triassic
- Age at base
-
- Triassic
Geography
- Geographical extent
- Lessolo, Fiorano.
References
- Definition
-
(1989) :
The Canavese Zone between the Serra d*Ivrea and the Dora Baltea River (Western Alps). Eclogae geol. Helv. 82/2, 413-417
p.421: The oldest members of the Mesozoic cover are dolomitic limestones, which are
whitish-grey, rarely pinkish, in colour and locally contain darker grey interlayers. In
some places there are structures suggesting both bioturbation and dessication, and
remnants of foraminifera and Dasycladaceae were described by Wozniak (1977) and
Biino (1985). The dolomitic limestones were considered as Middle Triassic in age by
Issel (1893), Parona (1924) and Elter et al. (1966), and Upper Triassic by Baggio
(1965) and Ahrendt (1972). Sturani (1975, p. 165), though favouring a Middle
Triassic age, reports the presence of dolostones with a Norian "Hauptdolomit" facies.
The top of the dolomitic limestone is marked by an irregular erosional surface,
which is covered by a fine-grained pinkish to pinkish-violet calcarenite to calcirudite
limestone.