Goms-Gneiskomplex

Représentation et statut

Index

G-Go

Couleur CMYK

(0%,16%,16%,2%)

Couleur RGB

R: 250 G: 210 B: 210

Rang

Formation lithostratigraphique

Usage

Ce terme est en usage.

Status

terme informel

Nomenclature

Deutsch

Goms-Gneiskomplex

Français

Complexe gneissique de Goms

Italiano

Complesso gneissico di Goms

English

Goms Gneiss Complex

Origine du nom

Goms (VS)

Variantes historiques

Goms Gneiss Complex (Berger et al. 2017)

Hiérarchie et succession

Unités hiérarchiquement subordonnées

• Unterwassern-Gneis

Âge

Âge au sommet

• Paléozoïque

Âge à la base

• Précambrien

Références

Définition

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.67: Following OBERHOLZER (1955), the two slices of polycyclic gneisses were depicted on the present map but, due to the map scale, these two lithologically distinguished units were grouped into one single unit called the Goms Gneiss Complex. OBERHOLZER (1955) described two-mica plagioclase K-feldspar gneiss, migmatite (“Mischgneise”) and biotite-plagioclase gneiss derived from sedimentary protoliths intercalated with amphibolitic layers and a serpentinite lens. These rock associations are very similar to sequences in the “Streifengneis” Complex, Paradis Gneiss Complex and the Val Nalps Gneiss Complex of the adjacent Ausserbinn-Piz Cavel Zone of the Gotthard Nappe. Noteworthy is a strong alteration of the gneisses in the region of Ernen and an epidote- and chlorite-rich metagranodiorite (“Gneis von Unterwasser”, OBERHOLZER 1955).

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