Fuggstock-Member
Back to Eastern HelveticsRepresentation and status
- Color CMYK
- (0%,50%,63%,22%)
- Color RGB
- R: 200 G: 100 B: 75
- Rank
- lithostratigraphic Member (Subformation)
- Validity
- Unit is in Use
- Status
- informal term
Nomenclature
- Deutsch
- Fuggstock-Member
- Français
- Membre du Fuggstock
- Italiano
- Membro del Fuggstock
- English
- Fuggstock Member
- Origin of the Name
-
Fuggstock = Fuggenstock (GL), südöstlichen Vorgipfel des Gulderstockes
- Historical Variants
- Fuggstock-Sernifit (Fisch 1961, Huber 1964, Ryf 1964, Rutsch et al. 1966), Fuggstock Sernifite (Letsch et al. 2015), Fuggstock-Formation
- Nomenclatorial Remarks
- Sernifite supérieur (Huber 1964)
Description
- Description
- WL Sst und Ton-/Siltssteine, mit Tuffen, Tuffiten & Spilitlagen, Basis konglomeratisch
- Thickness
- max. ca. 460 m an der Typlokalität
Hierarchy and sequence
- Units at roof
- Units at floor
- Upper boundary
- gradual upward fining
Age
- Age at top
-
- Cisuralian (= Early Permian)
- Age at base
-
- Cisuralian (= Early Permian)
Geography
- Geographical extent
- von Widersteinerloch im Nordwesten bis in den Westhang des Wissgandstöckli im Osten
Palaenography and tectonic
-
- Verrucano
- Tectonic unit (resp. main category)
- Kind of protolith
-
- sedimentary
- Conditions of formation
- thinning towards the NE (contrary to the Üblital Sernifite)
References
- Definition
-
(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 latter area [NE of the Sernftal], the Mären Formation passes gradually into a finer-grained, brownish-red or locally purple Sernifite. Contrary to the Üblital Formation, this Sernifite body thins towards the NE and was thus most probably shed from the SW, i.e. the area of the present-day Freiberg (Fisch 1961; Ryf 1965). It contains only little spilitic detritus (Ryf 1965) but very much, often well-rounded, quartz grains (up to 50% of all components). The rest is composed of feldspar and mica with the former often exhibiting in thin section irregular patches and spots where the feldspar has been replaced by calcite and sericite. (...) The Fuggstock Sernifite is very rich in heavy minerals, particularly zircon, especially in comparison with the zircon-poor Üblital Formation.