Windgällen-Formation

Retour à massif de l'Aar

Représentation et statut

Index
hWi
Couleur CMYK
(11%,0%,11%,29%)
Couleur RGB
R: 160 G: 180 B: 160
Rang
Formation lithostratigraphique
Usage
Ce terme est en usage.
Status
terme informel
Discussion du statut

Nomenclature

Deutsch
Windgällen-Formation
Français
Formation des Windgällen
Italiano
Formazione delle Windgällen
English
Windgällen Formation
Origine du nom

Chli Windgällen (UR)

Variantes historiques

Windgällen-Formation (Schenker 1987), Windgällen Formation (Berger et al. 2017)

Remarques nomenclatoriales

non Windgällen-Mb. Kugler 1987

Links

Non synonymes

Hiérarchie et succession

Unités hiérarchiquement subordonnées

Âge

Âge au sommet
  • Pennsylvanien tardif
Âge à la base
  • Pennsylvanien tardif
Méthode de datation

299 +/-2 Ma (U/Pb Zirkon ; Schaltegger 1993)

Paléogéographie et tectonique

Paléogéographie
continent européen
Termes génériques

Références

Révision
Berger Alfons, Mercolli Ivan, Herwegh Marco, Gnos Edwin (2017) : Geological Map of the Aar Massif, Tavetsch and Gotthard Nappes. Geological Special Map 1:100'000, Explanatory Notes 129

p.46: The Windgällen Formation is characterised by a large amount of rhyolitic, volcanic and volcaniclastic rocks and by a subvolcanic intrusive body (Figs.6, 7 a, FRANKS 1968 a). Locally, clastic metasedimentary rocks form the basis of the volcanic sequence. FRANKS (1968 a) stressed the similarity of these sedimentary rocks with those of the Bifertengrätli Formation, despite the lack of datable fossils. The rhyolites of the Windgällen Formation were dated at 299±2 Ma (U/Pb on zircon, SCHALTEGGER 1993) in agreement with the Late Carboniferous age of fossils in the Bifertengrätli Formation.
The particular tectonic position of the rocks of the Windgällen Formation was recognised early in the history of the Alpine geological studies (see FRANKS 1968 a and references therein). In fact, the Windgällen area is a huge Alpine recumbent fold with Late Carboniferous metasedimentary, volcanic and volcaniclastic rocks forming the core, and autochthonous Mesozoic sedimentary rocks the outer parts (Fig.7 a, HANTKE & BRÜCKNER 2011, FUNK et al.1983).

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