Drusberg-Decke
Back to Drusberg 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
- Drusberg-Decke
- Français
- Nappe du Drusberg
- Italiano
- Falda del Drusberg
- English
- Drusberg Nappe
- Origin of the Name
- Historical Variants
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Drusberg-Decke (Lienert et al. 2003)
Description
- Description
-
Die Hauptmasse der oberhelvetische Drusberg-Decke besteht aus Gesteinen der helvetischen Kreide. Frontalen Schuppen der Drusberg-Decke bilden der helvetische Randkette (Niederhorn, Pilatus, Bürgenstock, Urmiberg, Rigi Hochflue).
Hierarchy and sequence
Age
- Age at top
-
- Eocene
- Age at base
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- Cretaceous
References
- Definition
-
2024) :
Tectonic Map of Switzerland 1:500000, Explanatory notes. Federal Office of Topography swisstopo, Wabern
(
p.40: From the Kander Valley, the Axen and Drusberg nappes represent the eastward continuation of the Wildhorn Nappe Complex. The transition is caused by a synsedimentary fault (Bachli-Giesenen Fault, Hänni & Pfiffner 2001), which led to the development in the east of a very thick marl sequence (earliest Cretaceous Palfris Formation) that acted as décollement layer during Alpine nappe stacking.
Up to the Engelberg Valley, the stratigraphic series of the Axen Nappe and that of the Drusberg Nappe are practically complementary. The Axen Nappe is composed of a Jurassic series with some Triassic fragments in its base and Cretaceous and Paleogene sediments in the eastern part of the area. The Drusberg Nappe consists only of Cretaceous to Paleogene sediments. Between the Engelberg Valley and the Klöntal, where the Axen Nappe series is complemented by overlying Paleogene sediments, the internal structure of the nappe becomes more complex due to the presence of numerous thrusts following additional décollement levels which split the nappe into several slices. In contrast, the stratigraphic series of the Drusberg Nappe does not change. However, three slices of Late Jurassic limestone (Quinten Formation) are present at its base; one is located in the Muotatal and underlies the Palfris Formation (Wissenwand Slice, Hantke et al. 2013), the other two crop out between the Engelberg Valley and the Vierwaldstättersee, intercalated into the Palfris Formation (Maisander Slices, Menkveld 1995); the latter are considered part of the Axen Nappe.
Between the Thunersee and the Vierwaldstättersee, the Drusberg Nappe contains a large-scale open synformal structure which preserves tectonically higher units in its core, from bottom to top: the Habkern Mélange Zone, the Lower Penninic Schlieren Nappe and klippen of the Middle Penninic Préalpes Médianes Nappe. The internal structure of the Axen Nappe changes abruptly across the Engelberg Valley (Pfiffner et al. 2010, Pfiffner 2011) owing to a fault perpendicular to the fold axes and active during nappe formation. In a similar manner, a fault must be assumed along the southeastern part of the Vierwaldstättersee which explains the very different nappe structure of the Axen and the Drusberg nappes on both sides of the lake (Pfiffner et al. 2010, Pfiffner 2011).
East of the Vierwaldstättersee, the two nappes can be traced all the way up to the Linth Valley. On the western flank of this valley, they are underlain by the Glarus Nappe Complex (including the Mürtschen Nappe), while they are replaced by the Glarus Nappe Complex and the Säntis Nappe on the eastern flank. A major N – S oriented fault is assumed to be present along the Linth Valley in order to explain the dramatic change in internal structure of the Helvetic nappes on either side of the valley.
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Fluebrig–Drusberg-Element
- Name Origin
- Rank
- tectonic unit
- Status
- informal term
- In short
-
Sitrnfalte der Drusberg-Decke.
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Rederten-Element
- Name Origin
- Rank
- tectonic unit
- Status
- informal term
- In short
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Teil der Drusberg-Decke.
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Wiggis-Element
- Name Origin
- Rank
- tectonic unit
- Status
- informal term
- In short
- Teil der Drusberg-Decke.
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Wissenwand-Schuppe
- Name Origin
-
Wissenwand (SZ), südlich Muotathal
- Rank
- tectonic slice
- Status
- local name (informal)
- In short
-
The Wissenwand Slice, composed of Late Jurassic limestone (Quinten Formation), forms the base of the Drusberg Nappe in the Muotatal, where it underlies the Palfris Formation of the main part of the nappe.
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Niederhorn–Pilatus-Schuppe
- Name Origin
- Rank
- tectonic
- Status
- valid
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Bürgenstock-Urmiberg-Schuppe
- Name Origin
- Rank
- tectonic slice
- Status
- valid
- In short
- Südliche, höhere Schuppe der Helvetische Randkette.
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Hochflue-Schuppe
- Name Origin
- Rank
- tectonic slice
- Status
- local name (informal)
- In short
- Nördliche, tiefere Schuppe der Helvetische Randkette.
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Stad-Formation
- Name Origin
- Rank
- lithostratigraphic Formation
- Status
- valid formal name
- Nomenclatorial Remarks
- <p>Entspricht den «Globigerinenmergel» auct., sowie den «Fleckenmergel» auct.</p>
- In short
-
Grünlich grauer, hell anwitternder, oft gefleckter Mergel, reich an planktonischen Foraminiferen. Gelegentlich siltig-feinsandig oder kalkig; lokal mit Konglomerat- oder Quarzsandsteinlagen an der Basis.
- Age
- Lutetian
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Wängen-Kalk
- Name Origin
-
Wängenalp (OW) im Kleinschlierengebiet
- Rank
- lithostratigraphic Bed
- Status
- informal term
- In short
-
Einlagerungen von grobkörnigem, bioklastischem Kalk (u.a. Lithothamnienkalk bzw. Rotalgenkalk) im Stad-Mergel.
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Jochstock-Konglomerat
- Name Origin
-
Jochstock (OW)/(NW)/(BE), Urner Alps, 5 km S Engelberg
- Rank
- lithostratigraphic Bed
- Status
- local name (informal)
- In short
-
Konglomerat bis Brekzie, vorwiegend mit Komponenten von schwach gelblich anwitterndem, biogenem Kalk (Betlis-Kalk) in dunkler, mergeliger, z.T. sandig-kalkiger Matrix.
- Age
- late Eocene
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Rütenen-Konglomerat
- Name Origin
-
Rütenen (NW), östlich Beckenried
- Rank
- lithostratigraphic Bed
- Status
- local name (informal)
- In short
- Massives, grobes und schlecht sortiertes Konglomerat mit mergeliger Matrix, das in der Stad-Formation zwischengeschaltet ist. Die Gerölle stammen aus den liegenden Einheiten der Spätkreide und des Paläogens.
- Age
- Eocene
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Kleintal-Konglomerat
- Name Origin
- Rank
- lithostratigraphic Bed
- Status
- informal term
- In short
- Konglomerat mit Geröllen aus den liegenden Einheiten der Kreide (Betlis-Kalk bis Schrattenkalk) und des Mitteleozäns (Bürgen-Formation).
- Age
- Priabonian
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Lochegg-Brekzie
- Name Origin
- Rank
- lithostratigraphic Bed
- Status
- local name (informal)
- In short
-
Dünne brekziöse Einlagerung mit aufgearbeiteten Globotruncanen innerhalb der Stad-Fm. der «Einsiedler Flyschserie».
- Age
- Eocene
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Schrattenkalk-Formation
- Name Origin
-
Schratte ("zerissen"): Karre, wie am Schratteflue (LU) (früher "Schrattenfluh" geschrieben)
- Rank
- lithostratigraphic Formation
- Status
- informal term
- Nomenclatorial Remarks
- <p>Stellt die «Urgonfazies» des Helvetikums dar.</p>
- In short
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Meist hellgrau anwitternder, gebankter bis massiger Flachwasser-Kalk der helvetischen «Mittleren Kreide», im oberen Teil mit vielfältiger Fauna (Rudisten, Korallen, Gastropoden, Muscheln und Mikrofauna).
- Age
- Late Barremian
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Oberer Teil der Schrattenkalk-Formation
- Rank
- lithostratigraphic Member (Subformation)
- Status
- incorrect name (though informally used)
- In short
-
Informelle Bezeichnung für den oberen Teil des Schrattenkalkes: hellgrau anwitternder, massiger, bioklastreicher Kalk (Rudisten, Korallen, Gastropoden Muscheln und Mikrofauna).
- Age
- Early Aptian
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Rawil-Member
- Name Origin
- Rank
- lithostratigraphic Member (Subformation)
- Status
- informal term
- Nomenclatorial Remarks
- <p>«Unteren Orbitolinen-Schichten» auct., Marnes noirâtres à Orbitolines (Rollier 1917), Mergelschiefer-Einlagerungen (Heim 1917), Mergelband (Alexander et al. 1965), niveau à Orbitolina lenticularis auct. = brèche à Orbitolines (Plancherel 1998)</p>
- In short
-
Weicheres Band inmitten des massiven Schrattenkalkes, bestehend aus einer Wechsellagerung von dunklem, mergeligem, flaserigem Kalk und braunem, grümeligem Mergel.
- Age
- Earliest Aptian
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Unterer Teil der Schrattenkalk-Formation
- Rank
- lithostratigraphic Member (Subformation)
- Status
- incorrect name (though informally used)
- In short
-
Informelle Bezeichnung für den unteren Teil des Schrattenkalkes: hellgrau anwitternder, dickbankiger, fossilarmer Kalk.
- Age
- Late Barremian