Formazione della Preja

Representation and status

Color CMYK
(20%,10%,0%,2%)
Color RGB
R: 200 G: 225 B: 250
Rank
lithostratigraphic Formation
Validity
Unit is in Use
Status
informal term

Nomenclature

Deutsch
Preja-Formation
Français
Formation de la Preja
Italiano
Formazione della Preja
English
Preja Formation
Origin of the Name

Passo della Preja (Italia)

Historical Variants

Quartzites, dolomies et métawildflysch de la zone de Furgg supérieure (Escher et al. 1987), Preja Formation = Furgg Mesozoic marble (Steck et al. 2015)

Hierarchy and sequence

Subordinate units

Age

Age at top
  • Late Jurassic
Age at base
  • Triassic

References

Definition
Steck Albrecht, Masson Henri, Robyr Martin (2015) : Tectonics of the Monte Rosa and surrounding nappes (Switzerland and Italy): Tertiary phases of subduction, thrusting and folding in the Pennine Alps. Swiss J. Geosc. 108/1, 3-34

p.11: These meta-graywackes are overlain by 20 cm of Triassic quartzite and about 3 m of dolomite and cornieule, followed by 4 m of a graphitic sandy calcite marble, 6 m of a brown weathering siliceous marble and 15 m of a white calcite marble attributed respectively to the Lower, Middle and Upper Jurassic of the Preja sedimentary Formation.

  • «Weisse Marmore» der Preja-Formation

    Rank
    lithostratigraphic unit
    Status
    informal term
    In short

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

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

    Rank
    lithostratigraphic unit
    Status
    informal term
    In short

    Braune Sandkalke (Dogger) der Preja-Formation,

    Age
    Middle Jurassic
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  • «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
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  • 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
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  • 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
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