• Falda del Monte Rosa

    Origin of the Name

    Monte Rosa (VS)

    Rank
    nappe
    Status
    valid
    In short

    The Monte Rosa Nappe is a Middle Penninic tectonic unit of the Western Alps mainly comprising a polycyclic crystalline basement (paragneisses and orthogneisses of Carboniferous and Permian intrusion age). This basement is subdivided in two parts by the thick Stellihorn Shear Zone. A sedimentary series, known as the “Furgg Zone” (Permian to Jurassic metasediments, crosscut by mafic sills and dykes), surrounds the crystalline basement in a discontinuous manner, and separates in particular the Monte Rosa gneisses from those of the Portjengrat Nappe. All the rocks of the Monte Rosa Nappe have undergone a high pressure metamorphism (eclogite facies).

  • Furgg-Serie

    Origin of the Name

    Furggtal (VS)

    Rank
    tectonically bounded lithostratigraphic unit
    Status
    informal term
    Age
    Permian - Mesozoic
    In short

    Stark beanspruchte sedimentäre Bedeckung der Monte-Rosa-Decke (Metaarkose, Quarzit und Marmor), eingefaltet in der Antrona-Decke.

    • Metabasische Boudins und Gängen der Furgg-Zone

      Rank
      petrography
      Status
      informal term
      In short

      Querschlagende basische Gänge und Boudins der Furgg-Serie.

    • Formazione della Preja

      Name Origin

      Passo della Preja (Italia)

      Rank
      lithostratigraphic Formation
      Status
      informal term
      In short

      Mesozoische Abfolge der Furgg-Zone: Quarzit, Rauwacke, graphitischer Marmor, Sandstein, sandiger Mergel und kalkiger Marmor.

      Age
      Triassic
      • «Weisse Marmore» der Preja-Formation

        Rank
        lithostratigraphic unit
        Status
        informal term
        In short

        Reiner weisser Kalzit-Marmor (Malm) der Preja-Formation.

        Age
        Late Jurassic
      • «Braune Sandkalke» der Preja-Formation

        Rank
        lithostratigraphic unit
        Status
        informal term
        In short

        Braune Sandkalke (Dogger) der Preja-Formation,

        Age
        Middle Jurassic
      • «Lias-Sandkalke» der Preja-Formation

        Rank
        lithostratigraphic unit
        Status
        informal term
        In short

        Dunkle graphitführende Sandkalke und Glimmerquarzite (Lias) der Preja-Formation.

        Age
        Early Jurassic
      • Dolomitmarmor der Preja-Formation

        Rank
        lithostratigraphic unit
        Status
        informal term
        In short

        Kieselige Kalzit-Dolomitmarmore der Preja-Formation, mit Tremolit-Quarz-Kalzit- oder Tremolit-Kalzit-Dolomit-Marmorlagen.

        Age
        Triassic
      • Quarzit der Preja-Formation

        Rank
        lithostratigraphic unit
        Status
        informal term
        In short

        Dünner Quarzithorizont an der Basis der Preja-Formation (am Kontakt mit den permischen Grauwacken der Cavalli-Formation)..

        Age
        Triassic
    • Formazione dei Cavalli

      Name Origin

      Alpe/Bacino dei Cavalli (Italia)

      Rank
      lithostratigraphic Formation
      Status
      informal term
      In short

      Spätpaläozoische Metagrauwacke, Metaarkose, Glimmer-haltiger Quarzit und Glimmerschiefer der Furgg-Zone, mit zahlreiche Amphibolit-Boudins.

      Age
      Permian
  • Granito di Mezzalama

    Origin of the Name

    Rifugio Mezzalama (Italia), Val de Véraz (dedicato al alpinista italiano Ottorino Mezzalama, 1886-1930)

    Rank
    lithostratigraphic unit
    Status
    local name (informal)
    Age
    Cisuralian (= Early Permian) - Guadalupian (= Middle Permian)
    In short

    Porphyrischer Granit der Monte-Rosa-Decke.

  • Ortogneiss del Monte Rosa

    Origin of the Name

    Monte Rosa (VS)/(Italia)

    Rank
    lithostratigraphic unit
    Status
    informal term
    Age
    Carboniferous
    In short

    Granodioritischer, grobflaseriger Gneis der Monte-Rosa-Decke.

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