Schönbühl-Formation

Back to Eastern Helvetics

Representation and status

Color CMYK
(0%,45%,59%,14%)
Color RGB
R: 220 G: 120 B: 90
Rank
lithostratigraphic Formation
Validity
Unit is in Use
Status
informal term
Status discussion

Nomenclature

Deutsch
Schönbühl-Formation
Français
Formation de Schönbühl
Italiano
Formazione di Schönbühl
English
Schönbühl Formation
Origin of the Name

Schönbühl = Schönbüel (GL), Plateau zwischen Spitzmeilen und Rotgandwand

Historical Variants

Schönbühl-Schiefer(n) (Brunnschweiler ---, Trümpy ---, Dollfuss ---, Fisch 1961, Rutsch et al. 1966), Schönbühlschiefer (Bächtiger 1963, Ryf 1964), Schistes de Schönbühl (Huber 1964), Schönbüel Formation (Letsch et al. 2015), Schönbühl-Formation (Löpfe et al. 2018)

Description

Description

rote Tonsteine, einige Sst- & Kalkbänke, zuoberst Quarzitbänke / höchste Horizont des Verrucano: blutroten Schieferserie / Phylliten

Hierarchy and sequence

Subordinate units
Units at roof
Units at floor
Lower boundary

locally marked angular unconformity (Ryf 1965)

Age

Age at top
  • Lopingian (= Late Permian)
Note about top

Trias [Brunnschweiler], Lias [Trümpy] oder sogar Dogger [Dollfuss]

Age at base
  • Cisuralian (= Early Permian)
Note about base

Frühes oder Mittleres Perm ?

Geography

Geographical extent
von Fulengipfel nach Norden und Westen

References

Definition
Fisch W. P. (1961) : Der Verrucano auf der Nordost-Seite des Sernftales (Kt. Glarus) Mitteilungen der Naturforschenden Gesellschaft des Kantons Glarus 11, 88 S.
Definition
Letsch Dominik, Winkler Wilfried, von Quadt Albrecht, Gallhofer Daniela (2015) : The volcano-sedimentary evolution of a post-variscan intramontane basin in the Swiss Alps (Glarus Verrucano) as revealed by zircon U-Pb age dating and Hf isotope geochemistry. International Journal of Earth Sciences (Geologische Rundschau) 104, 123–145

p.133: In the upper Chrauchtal and Murgtal, the Verrucano ends with an intensely red, silty shale succession (playa deposits) with abundant green reduction spots and some intercalated coarser-grained layers (sandstones and Sernifites), the Schönbüel Formation (Fisch 1961). In the basal parts of the Schönbüel Formation north of the Murgsee, Ryf (1965) could observe a marked angular unconformity in

fine-grained Sernifites. The layers below the unconformity dip some 25° steeper than the layers above and the latter fill channels which are incised into the former (see the pictures provided by Ryf 1965). (...) At the type locality of the Schönbüel Formation (the Schönbüel plateau between the Spitzmeilen and the Rotgandwand) the uppermost part of this Formation, a few 10 m below the erosional base of the Triassic Mels Formation (Gisler et al. 2007), is interrupted by three very prominent, reddish-white, feldspar- and quartz-rich layers, each between 0.5 m and 4 m thick (see Fig. 8c, the so-called “Schönbüel quartzites” of the older literature) which were identified by Ryf (1965) as partly reworked rhyolitic tuff layers. Markus (1967) and Richter (1968) could follow these three tuff layers in the areas to the E and NE of the present study area (Flumserberge, Schilstal, and Guscha group) over an area of at least 150 km2.

  • «Schönbühl-Quarzit»

    Name Origin

    Schönbühl = Schönbüel (GL), Plateau zwischen Spitzmeilen und Rotgandwand

    Rank
    lithostratigraphic Member (Subformation)
    In short

    Markante Sandsteinbänke mit vulkanischen Detritus, die eine Zweiteilung der Schönbühl-Formation ermöglicht.

    Age
    Guadalupian (= Middle Permian)
Back to top