Brönich-Gneis («Schwarze Gneisgruppe»)

Rappresentazione e statuto

Colore CMYK

(0%,0%,0%,100%)

Rango

unità litostratigrafia

Uso

Unità in uso.

Status

termine locale (informale)

Nomenclatura

Deutsch

Brönich-Gneis («Schwarze Gneisgruppe»)

Français

Gneiss de Brönich

Italiano

Gneiss di Brönich

English

Brönich Gneiss

Origine del nome

Felsen oberhalb Brönich (TI), östlich Frodalera

Varianti storiche

Brönich Group (Chadwick 1968), Dunkle Serizitphyllite mit Granat und Staurolith = Schwarze Serie (Huber 1985), Graphitische, quarzreiche Schiefer (Bl. Olivone)

Descrizione

Descrizione

Dunkle Staurolith-(Granat-)phyllite

Età

Geomorfologia

• Carbonifero

Età alla base

• Carbonifero

Metodo di datazione

Karbon (Bossard 1936, Huber 1985)

Referenze

Definizione

Chadwick Brian (1968) : Deformation and metamorphism in the Lukmanier region, Central Switzerland Geol. Soc. America Bull. 79, 1123-1150

This group, which is exposed South of the summer pasture of this name, consists mainly of black graphitic paraschists with abundant garnet and a conglomeratic gneiss containing small nests of blue kyanite. Because of the presence of graphite, Bossard (1936) suggested that these rocks may be of Carboniferous age.