Goms-Gneiskomplex

Rappresentazione e statuto

Index

G-Go

Colore CMYK

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

Colore RGB

R: 250 G: 210 B: 210

Rango

Formazione litostratigrafica

Uso

Unità in uso.

Status

termine informale

Nomenclatura

Deutsch

Goms-Gneiskomplex

Français

Complexe gneissique de Goms

Italiano

Complesso gneissico di Goms

English

Goms Gneiss Complex

Origine del nome

Goms (VS)

Varianti storiche

Goms Gneiss Complex (Berger et al. 2017)

Gerarchia e successione

Unità di rango inferiore

• Unterwassern-Gneis

Età

Geomorfologia

• Paleozoico

Età alla base

• Precambriano

Referenze

Definizione

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).

Revisione

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