Scaglia Rossa Lombarda
Back to South AlpineRepresentation and status
- Index
- c8
- Color CMYK
- 40 / 0 / 60 / 0
- Color RGB
- R: 160 G: 210 B: 140
- Rank
- lithostratigraphic Formation
- Validity
- Unit is in Use
- Status
- informal term
Nomenclature
- Deutsch
- Scaglia Rossa Lombarda
- Français
- Scaglia Rossa Lombarda
- Italiano
- Scaglia Rossa Lombarda
- English
- Red Lombardian Scaglia
- Historical Variants
-
Scaglia Rossa (Vonderschmitt 1940, Venzo 1954, Stockar 2003, Carcano et al. 2007), Rote Scaglia (Vonderschmitt 1941), Red Scaglia (Bitterli 1965), Scaglia rossa (Bichsel & Häring 1981, Oppizzi & Spinedi 2007), Formazione di Sorisole (Bersezio et al. 1990), Scaglia Rossa Lombarda (Bernoulli et al. 2018), Marne e calcareniti rosse
- Nomenclatorial Remarks
-
Corrisponde alla Formazione di Sorisole (Bersezio et al. 1990)
Links
- Synonyms
Description
- Thickness
- 40 m (Carcano et al. 2007)
Components
- foraminifera
- radiolarians
Globigerinen, Radiolarien, Globotruncanen (Gl. appenninica Renz)
Hierarchy and sequence
- Units at roof
- Units at floor
Age
- Age at top
-
- Late Cenomanian
- Note about top
-
Rotalipora greenhornensis Morrow = Late Cenomanian
- Age at base
-
- Early Cenomanian
Geography
- Geographical extent
- Lombardia nord-occidentale e Ticino (Varesotto, Mendrisiotto).
Palaenography and tectonic
-
- Kreide des Südalpins
- Tectonic unit (resp. main category)
- Kind of protolith
-
- sedimentary
- Conditions of formation
-
open-marine (pelagic), quiet environment
- Metamorphism
- non metamorphic
References
- Definition
- (1941) : Bericht über die Exkursion der Schweizerischen Geologischen Gesellschaft in den Süd-Tessin. Eclogae geol. Helv. 33/2 (1940), 205-219
- Definition
-
(1981) :
Facies evolution of Late Cretaceous flysch in Lombardy (northern Italy). Eclogae geol. Helv. 74/2, 383–420
p.388: In western Lombardy (Varesotto, Brianza, Bergamasco), the Scaglia rossa is restricted to the Cenomanian. In the Varesotto the Scaglia rossa overlies the Scaglia bianca (Lower Cenomanian, Luterbacher 1965) and is followed by the Varesotto Flysch dated as Upper Cenomanian (Luterbacher 1965, Sames 1970). In an abandoned quarry northeast of Gropello (northern Lago di Varese) the Scaglia rossa is well exposed. It mainly consists of knobby weathering red marls. Few cm-thick, dark and light-grey layers are intercalated. The single layers are of great lateral continuity. The carbonate content ranges from 27% to 77%. The carbonate-rich layers display structures of resedimentation in the silty to pelitic material. Sedimentary structures are largely obliterated by burrowing (e.g. Chondrites). The red marls contain a rich planktonic microfauna. The top is dated as Late Cenomanian by Rotalipora greenhornensis Morrow. In the Brianza and the Bergamasco the Scaglia rossa overlies the Sasso della Luna. It is followed by the Scisti neri superiori of Late Cenomanian age (Guillot 1967, Vicente 1966) in the Brianza and is directly overlain by the Sarnico Sandstone of Early Turonian age in the eastern
Bergamasco.