• Portjengrat-Decke

    Origin of the Name

    Portjengrat = Pizzo d'Andolla (VS)/(Italia)

    Rank
    nappe
    Status
    valid
    In short

    The Portjengrat Nappe, exposed east of Saas Fee, is a Middle Penninic tectonic unit that underwent a Alpine high-pressure metamorphism and occupies a special position as a buffer zone between the Siviez-Mischabel and Monte Rosa nappes on the one side and between the Zermatt - Saas Fee and Antrona nappes on the other side. It consists mainly of a crystalline basement resembling that of the Siviez-Mischabel and Monte Rosa nappes, overlain by a very thin Mesozoic sedimentary cover. Both basement and cover are crosscut by mafic veins, such as in the adjacent “Furgg Zone”.

  • Grundberg-Serie

    Origin of the Name

    Grundberg (VS), SE Saas-Grund

    Rank
    tectonically bounded lithostratigraphic unit
    Status
    informal term
    Age
    Triassic - Late Cretaceous
    In short

    Autochtone Mesozoische sedimentäre Bedeckung der Portjengrat-Decke.

    • Wildflysch der Grundberg-Serie

      Name Origin

      Wildflysch = Mélange (Bl. Saas)

      Rank
      lithostratigraphic unit
      Status
      informal term
      Age
      Palaeogene
    • Kalkglimmerschiefer der Grundberg-Serie

      Rank
      lithostratigraphic unit
      Status
      informal term
      Age
      Late Cretaceous
    • Knotiger Kalkglimmerschiefer und reiner Kalzitmarmor der Grundberg-Serie

      Rank
      lithostratigraphic unit
      Status
      informal term
      In short

      Knotige Kalkglimmerschiefer und reiner Kalzitmarmor (Jura) der Grundberg-Serie.

      Age
      Jurassic
    • Dolomitmarmor und Rauwacke der Grundberg-Serie

      Rank
      lithostratigraphic unit
      Status
      informal term
      Age
      Triassic
    • «Basale Arkose» der Grundberg-Serie

      Rank
      lithostratigraphic unit
      Status
      informal term
      In short

      Arkose an der Basis der Grundberg-Serie.

      Age
      Triassic
  • Portjengrat-Orthogneis

    Origin of the Name

    Portjengrat = Pizzo d'Andolla (VS)

    Rank
    lithostratigraphic unit
    Status
    local name (informal)
    In short

    "Orthogneiss dérivant de granites (parfois granites basiques) et d'aplites; à muscovite (ou mica vert clair) et parfois biotite; avec zoïsite (ou pistazite)." (Huang 1935)

  • Saas-Fee-Augengneis

    Origin of the Name

    Saas Fee (VS)

    Rank
    lithostratigraphic unit
    Status
    local name (informal)
    In short

    Grobflasiger Augengneis der Monte-Rose-Decke.

  • Almagelhorn-Migmatit

    Origin of the Name

    Almagelhorn = Almagellerhorn (VS)

    Rank
    lithostratigraphic unit
    Status
    local name (informal)
    In short

    Gneiss d'imbibition et d'injection à muscovite, biotite, chlorite, grenats, et parfois tourmaline. Avec masses subordonnées de paragneiss et d'orthogneiss." (Huang 1935)

  • Weissmies-Paragneis

    Origin of the Name

    Weissmies (VS)

    Rank
    lithostratigraphic unit
    Status
    local name (informal)
    In short

    "Paragneiss à muscovite (ou muscovite et biotite), chlorite, grenats etc., souvent associés à des gneiss d'imbibition feldspathique (avec ou sans tourmaline) auxquels ils passent sans limite tranchée." (Huang 1935)

  • Amphibolite der Portjengrat-Decke

    Rank
    petrography
    Status
    informal term
    In short

    Eklogitische Amphibolitbänder und seltene Eklogitschollen im Kristallin der Portjengrat-Decke.

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