Surselva-Gruppe

Representation and status

Color RGB
R: 200 G: 100 B: 150
Rank
lithostratigraphic Group
Validity
Unit is in Use
Status
provisional proposal

Nomenclature

Deutsch
Surselva-Gruppe
Français
Groupe de la Surselva
Italiano
Gruppo della Surselva
English
Surselva Group
Origin of the Name

Surselva (GR)

Historical Variants

Pre-Carboniferous intrusions = Surselva group (Ruiz et al. 2022)

Hierarchy and sequence

Subordinate units

Palaenography and tectonic

  • Variscan plutonic rocks of the Helvetic
Tectonic unit (resp. main category)
Kind of protolith
  • plutonic
Metamorphism
non metamorphic

  • Russein-Diorit

    Name Origin

    Untere Val Russein (GR)

    Rank
    lithostratigraphic Formation
    Status
    informal term
    In short

    Stark deformierter und verwitterter frühvariszischer (347.3 +/-1.8 Ma) feinkörniger Diorit des Aar-Massivs.

    Age
    Early Pennsylvanian
    Show details

  • Alp-Crap-Ner-Tonalit

    Name Origin

    Alp Crap Ner (GR)

    Rank
    lithostratigraphic Formation
    Status
    local name (informal)
    In short

    Frühvariszischer (339.8 +/-2.1 Ma) porphyrischer Tonalit mit grosse Quarzkristalle.

    Age
    Middle Mississippian
    Show details
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