Gärsthorn-Gneiskomplex

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Representation and status

Index
GO-G
Color CMYK
(0%,35%,29%,4%)
Color RGB
R: 245 G: 160 B: 175
Rank
lithostratigraphic Formation
Validity
Unit is in Use
Status
informal term

Nomenclature

Deutsch
Gärsthorn-Gneiskomplex
Français
Complexe gneissique du Gärsthorn
Italiano
Complesso gneissico del Gärsthorn
English
Gärsthorn Gneiss Complex
Origin of the Name

Gärsthorn (VS)

Historical Variants

Gneise von Grimsel-Längis (Niggli 1965a), Gärsthorn Gneiss Complex (Berger et al. 2017)

Hierarchy and sequence

Subordinate units

Age

Age at top
  • Paleozoic
Age at base
  • Precambrian

Palaenography and tectonic

  • Pre-Variscan polycyclic basement of the Helvetic
Tectonic unit (resp. main category)
Kind of protolith
  • plutonic

References

Definition
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.25: Augen gneiss and coarse-grained two-feldspar gneiss are the main rock types of the Gärsthorn Gneiss Complex. These rocks dominate in the southwestern and northeastern portion of the Ausserberg-Avat Zone but are rare or completely absent in the central part.

Material and varia

Images

  • Geimen-Augengneis

    Name Origin

    Geimen (VS)

    Rank
    lithostratigraphic unit
    Status
    local name (informal)
    In short

    Lokaler grobporphyrischer Augengneis innerhalb der Ausserberg-Avat-Zone.

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  • Bitschji-Augengneis

    Name Origin

    Bitschji (VS)

    Rank
    lithostratigraphic unit
    Status
    local name (informal)
    In short

    Lokaler grauer granodioritischer Serizit-Augengneis innerhalb der Ausserberg-Avat-Zone.

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