Sardona-Decke
Back to Sardona nappeRepresentation and status
- Color CMYK
- N/A
- Color RGB
- R: 241 G: 239 B: 237
- Rank
- nappe
- Validity
- Unit is in Use
- Status
- valid
Nomenclature
- Deutsch
- Sardona-Decke
- Français
- Nappe du Sardona
- Italiano
- Falda del Sardona
- English
- Sardona Nappe
- Origin of the Name
-
Alp bzw. Piz Sardona (SG), Calfeisen(tal)
- Historical Variants
-
Sardona unit (Lihou 1995), Sardona-Decke (den Brok et al. 2021), Sardona Nappe (Gouffon et al. 2024)
- Nomenclatorial Remarks
-
Piz Sardona >>> du Sardona, mais Alpe de Sardona
Description
- Description
-
Ultrahelvetische Decke in infrahelvetische Stellung. Stratigraphisch durch seine durchgehende klastische Flyschfazies charakterisiert, mit dem Sardona-Quarzit als prominentem Leithorizont.
Hierarchy and sequence
- Units at floor
- Upper boundary
-
Lochsiten-Kalk, Subhelvetische Decken, Oberhelvetikum
- Lower boundary
-
Blattengrat-Decke
Age
- Age at top
-
- middle Eocene
- Age at base
-
- Late Cretaceous
Palaenography and tectonic
- Paleogeography
- Ultrahelvetic Domain
- Tectonic unit (resp. main category)
- Kind of protolith
-
- tectonic
- Conditions of formation
-
Deep marine flysch deposits of Late Cretaceous to mid Eocene age (Lihou 1993, 1995).
References
- Definition
-
2024) :
Tectonic Map of Switzerland 1:500000, Explanatory notes. Federal Office of Topography swisstopo, Wabern
(
p.36: Three allochthonous units, which were emplaced in an early phase onto the future Helvetic domain (see p. 31), crop out in the area between Linthal and Sargans. They are composed mainly of Late Cretaceous to Paleogene sediments deposited in the very distal part of the Helvetic realm: Blattengrat and Bad Ragaz nappes of South Helvetic, Sardona Nappe of Ultrahelvetic affinity. The three units were subsequently truncated by the Glarus Thrust, which is the basal thrust of the Upper Helvetic subdomain, and simultaneously cut by out-of-sequence thrusts also involving both the basement and the cover of the Aar Massif (see § 4.1.1, Fig. 5).