Bajuvarikum
Back to Zentralschweizer KlippenRepresentation and status
- Color CMYK
- N/A
- Color RGB
- R: 241 G: 239 B: 237
- Rank
- tectonic domain
- Validity
- Unit is in Use
- Status
- informal term
Nomenclature
- Deutsch
- Bajuvarikum
- Français
- Bajuvarikum
- Italiano
- Bajuvarikum
- English
- Bajuvarikum
- Historical Variants
-
Bajuvarikum = Bajuvarisches Deckensystem (Gruber et al. 2010), Bajuvaric Nappe System (TK500 / Gouffon et al. 2024)
Description
- Description
-
Das Bajuvarikum als der nordwestlichste, und für diese Arbeit interessante Teil
der Nördlichen Kalkalpen besteht aus der höheren Lechtal-Decke (oberes Bajuvarikum) und der tieferen Allgäu-Decke (unteres Bajuvarikum, FAUPL & WAGREICH 2000).
Hierarchy and sequence
- Subordinate units
Geography
- Geographical extent
- Die bajuvarischen Decken der Nördlichen Kalkalpen lassen sich nach W bis ins Rätikon verfolgen, wo sie in Form von nach W aushebenden antiklinalen Halbfenstern und synklinalen Halbklippen enden (Eisbacher & Brandner 1995).
Palaenography and tectonic
- Tectonic unit (resp. main category)
- Kind of protolith
-
- tectonic
References
- Definition
-
(2024) :
Tectonic Map of Switzerland 1:500000, Explanatory notes. Federal Office of Topography swisstopo, Wabern
p.91: A nappe stack consisting exclusively of sedimentary rocks, ranging from the Permian to the Late Cretaceous, occupies the entire northern part of the Austroalpine in the Northern Calcareous Alps. These were detached from their crystalline basement during the Late Cretaceous, as inferred from synorogenic Cretaceous deposits (Ortner & Kilian 2022). They were affected by top-NW thrusting in the Cretaceous (Hauterivian to Turonian, Ortner & Kilian 2022), followed by top-N thrusting in the Cenozoic. This led to a complicated internal structure. From bottom to top these nappes were classically grouped into Bajuvaric, Tirolic-Noric and Juvavic nappe systems, a concept that is presently under discussion (Ortner & Kilian 2022). In the area of the Tectonic Map of Switzerland, from bottom to top, the Cenoman-Randschuppe, the Allgäu Nappe and the Lechtal Nappe belong to the Bajuvaric Nappe System, the Inntal Nappe and the Krabachjoch Nappe to the Tirolic-Noric Nappe System.
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Lechtal-Decke
- Name Origin
-
Lechtal (Österreich), Vorarlberg
- Rank
- nappe
- Status
- valid
- Nomenclatorial Remarks
- <p>"Lechtaler Hauptmulde" sensu Tollmann (1970a, 1976b), "Zürser Synklinorium" sensu May & Eisbacher (1999)</p>
- In short
-
The Lechtal Nappe is the upper tectonic unit of the Bajuvaric Nappe System (Upper Austroalpine) in the Northern Calcareous Alps. Its stratigraphic sequence is characterised by thick and widespread Jurassic and Cretaceous basin sediments, as well as local shallow sediments («Zürser Schwelle»).
In the northern Rätikon mountain range, between Austria, Liechtenstein and Switzerland, it is intersected by out-of-sequence thrust faults, which divided it into several slices (Schesaplana, Gorfion, Augstenberg, Ochsenkopf, Heubühl and Drei Schwestern slices) and also lead to the exposure of isolated lenses of the Arosa Zone. The «Northern Mittagspitz Zone», in the eastern Rätikon, and the Madrisa Slice, which is isolated north of Klosters between the Silvretta Nappe above and the Upper Penninic Arosa Zone below, are considered to be inverted slivers derived from the Lechtal Nappe.
- Age
- Late Carboniferous (= Pennsylvanian)
-
Schesaplana-Schuppe
- Name Origin
-
Massiv/Gipfel der Schesaplana (GR) [«sassa plauna» = ebener Felsblock]
- Rank
- tectonic slice
- Status
- informal term
- In short
-
The Schesaplana Slice is a tectonic subunit of the Lechtal Nappe at its southwestern border.
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Gorfion-Schuppe
- Name Origin
- Rank
- tectonic slice
- Status
- valid
- In short
-
The Gorfion Slice is a tectonic subunit of the Lechtal Nappe at its southwestern border.
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Augstenberg-Schuppe
- Name Origin
- Rank
- tectonic slice
- Status
- informal term
- In short
-
The Augstenberg Slice is a tectonic subunit of the Lechtal Nappe at its southwestern border.
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Ochsenkopf-Schuppe
- Name Origin
- Rank
- tectonic slice
- Status
- local name (informal)
- In short
-
The Ochsenkopf Slice is a tectonic subunit of the western part of the Lechtal Nappe.
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Heubühl-Schuppe
- Name Origin
-
Heubühl = Heubüal (LI), Saminatal
- Rank
- tectonic slice
- Status
- valid
- In short
-
The Heubühl Slice is a tectonic subunit of the Lechtal Nappe at its southwestern border. It has an exclusively Triassic stratigraphic sequence ranging from «Alpiner Buntsandstein» (Chazforà-/Fuorn-Fm.) up to «Hauptdolomit».
- Age
- Late Permian
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Drei-Schwestern-Schuppe
- Name Origin
- Rank
- tectonic slice
- Status
- valid
- In short
-
The Drei Schwestern Slice is a tectonic subunit of the Lechtal Nappe at its northwestern border. It has an exclusively Triassic stratigraphic sequence ranging from «Alpiner Buntsandstein» (Chazforà-/Fuorn-Fm.) up to «Hauptdolomit».
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«Nördliche Mittagsspitz-Zone»
- Name Origin
-
Mittagsspitz
- Rank
- tectonic zone
- Status
- local name (informal)
- In short
-
The «Northern Mittagspitz Zone», in the eastern Rätikon, is considered to be an inverted sliver derived from the Lechtal Nappe.
-
Madrisa-Schuppe
- Name Origin
- Rank
- tectonic zone
- Status
- informal term
- In short
-
The Madrisa Slice, which is isolated north of Klosters between the Silvretta Nappe above and the Upper Penninic Arosa Zone below, is considered to be an inverted sliver derived from the Lechtal Nappe.
- Age
- Permian
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Allgäu-Decke
- Name Origin
- Rank
- nappe
- Status
- valid
- In short
-
The Allgäu Nappe is the lower tectonic unit of the Bajuvaric Nappe System (Upper Austroalpine) in the Northern Calcareous Alps.
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Walsertal-Zone
- Name Origin
-
Walsertal (Österreich)
- Rank
- tectonic zone
- Status
- informal term
- In short
-
Melange-Zone mit wenige Ophiolithe, die eine Fortsetzung der Arosa-Decke zwischen Lichtenstein und dem Allgäu (direkt den Rhenodanubischen Flysch überlagernd) darstellt.
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Falkenstein-Zug
- Rank
- tectonic zone
- Status
- local name (informal)
-
«Cenoman-Randschuppe»
- Rank
- tectonic slice
- Status
- incorrect name (though informally used)
- Valid term
- Walsertal-Zone
- In short
-
The Cenoman-Randschuppe consists of an imbricate zone of slivers formed at the active margin between the Adriatic continental plate and the Piemonte-Liguria Ocean. It lies at the northern rim of the Upper Austroalpine (Northern Calcareous Alps) and consists of flysch-like coarse-grained deposits.