Aul-Decke

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Representation and status

Color CMYK
N/A
Color RGB
R: 241 G: 239 B: 237
Rank
tectonic slice
Validity
Unit is in Use
Status
valid

Nomenclature

Deutsch
Aul-Decke
Français
Nappe de l'Aul
Italiano
Falda dell'Aul
English
Aul Nappe
Origin of the Name

Piz Aul (GR), 4,5 km W Vals

Historical Variants

Aulteildecke (Kündig 1926a), Aullappen (Nabholz 1945, van der Plas 1959), obere Aul-Lappen (Kupferschmid 1977), Aul-Lappen (Bolli et al. 1980), Aul Nappe (Berger & Mercolli 2007), Aul-Schuppenzone, Aul-Decke = Aul Nappe (TK500 / Gouffon et al. 2024)

Description

Description

... bestehend aus Metasedimente (kalkige Bündnerschiefer = «Marmore»), Metabasalt (Pillow-Lava) und Serpentinit.

Thickness
300-600 m, im N über 1000 m (Steinmann 1994b)

Hierarchy and sequence

Subordinate units
Units at roof
Units at floor

Age

Age at top
  • Jurassic
Age at base
  • Triassic

Palaenography and tectonic

Paleogeography
Valaisan Basin
Kind of protolith
  • tectonic
Metamorphism
metamorphic

References

Definition
Gouffon Yves (Editor) (2024) : Tectonic Map of Switzerland 1:500000, Explanatory notes. Federal Office of Topography swisstopo, Wabern

p-72: The Aul Nappe structurally overlies the Vals Slices and consists of an ophiolitic mélange complex at its base, including serpentinite and pillow basalts, overlain by a marble of age not younger than Jurassic (Steinmann 1994).

  • Aul-Marmor

    Name Origin

    Gipfel des Piz Aul = Piz Ault (GR), 4,5 km W Vals

    Rank
    lithostratigraphic Formation
    Status
    informal term
    In short

    Helle, massig-plattige, grau bis bräunlich anwitternde Kalkbänke (Serizit/Muskovit führender «Marmor») im Bündnerschiefer der Aul-Decke, immer leicht sandig, manchmal leicht gradiert und mit Crinoidenstielglieder. Schiefrige Zwischenlagen fehlen weitgehend. Es handelt sich ursprünglich um quarzführende Kalkturbidite.

    Age
    Oxfordian
    Show details

  • Buccarischuna-Marmor

    Name Origin

    Bucarischuna (GR)

    Rank
    lithostratigraphic unit
    Status
    local name (informal)
    In short

    Weisser Marmor mit grünem Fuchsit und faustgrosse Dolomiteinschlüsse der Trias der Aul-Decke.

    Age
    Triassic
    Show details
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