Mären-Formation

Back to the list

Representation and status

Index
-
CMYK Color
-
RGB color
R: 190 G: 90 B: 55
Rank
lithostratigraphic Formation
Validity
Unit is in Use
Status
informal term
SCS note
-
SCS date
-
Comment
-

Nomenclature

German
Mären-Formation
French
Formation de la Mären(egg)
Italian
Formazione della Mären(egg)
English
Mären Formation
Origin of the Name

Märenegg (GL) auf der E-Seite des Krauchtales

Historical Variants
Mären-Serie (Fisch 1961, Huber 1964, Ryf 1964, Rutsch et al. 1966), Mären Formation (Letsch et al. 2015), Mären-Formation (Hantke et al. 2019)
Nomenclatorial Remarks
-

Synonyms

Synonyms
Non-synonyms
Possible confusion

Description

Description
heterogene Schiefer- und Phyllitserie, mit basischen Lavenbänke und saure "quarzporphyroide" Einschaltungen (Südseite des Gulderstockes) [Fisch 1961 S.9]
Geomorphology
-
Thickness
ca. 60 m im Osten

Components

Lithological content
-
Mineral content
-
Fossil content
-

Hierarchy and succession

Superordinate unit
Subordinate units
Units at roof
    -
Units at floor
Üblital-Formation «Plagioklasgneis»
Lateral equivalents
Upper boundary
-
Lower boundary
-
Stratigraphic discussion
-

Age

Age at top
Cisuralian (= Early Permian)
Note about top
-
Age at base
Cisuralian (= Early Permian)
Note about base
-
Dating method
Radiometrische Datierungen (U/Pb Zirkon ; Letsch et al. 2015): 285 Ma.

Geography

Geographical extent
vom Foolstock (Gipfelkappe) bis ins Widersteinerloch
Type area
-
Type locality
-
Type profile
-
Reference profiles
-
Point of interest
-

Paleogeography and tectonic

Paleogeography
-
Kind of protolith
-
Conditions of formation
-
Sequence
-
Tectonic Unit (resp. main category)
Glarus nappe complex
  • Ilanz
  • Wageten
  • Gonzen-Walenstadt
  • Mürtschen
Metamorphism
-
Metamorphic facies
-
Note on metamorphism
-

References

Definition
Fisch W. P. (1961): Der Verrucano auf der Nordost-Seite des Sernftales (Kt. Glarus) , Mitteilungen der Naturforschenden Gesellschaft des Kantons Glarus 11, 88 S.
Revision
Letsch D., Winkler W., von Quadt A., Gallhofer D. (2015): The volcano-sedimentary evolution of a post-variscan intramontane basin in the Swiss Alps (Glarus Verrucano) as revealed by zircon U-Pb age dating and Hf isotope geochemistry. , International Journal of Earth Sciences (Geologische Rundschau) 104, 123-145

p.132: The Üblital Formation grades upward into the Mären Formation (Fisch 1961) which is dominated by fine grain sizes and the abundant occurrence of volcanic rocks and the peculiar Sonnenberg horizons. This Formation can be divided into a lower part without any volcanics (the Foostock Member, Fisch 1961) and an upper part with abundant volcanics (the Grisch Member, Wyssling 1950). The Mären Formation is characterized by sandy and silty pelitic rocks of reddish, purple, or green colour. Intense red colours as in the Schönbüel Formation (see below) lack. In the Grisch member, volcanic rocks and darker sediments of the Sonnenberg type may dominate the section, especially in the Freiberg area (Amstutz 1954). In the Murgtal area, the Mären Formation passes laterally into a sandy marginal facies dominated by sandstones and fine-grained breccias (Ryf 1965).
Important publications
-

Material and varia

Applications
-
  • Grisch-Member Show details

    Origin of the Name

    Piz Grisch = Laaxer Stöckli (GR), SW vom Segnas-Pass

    Rank
    lithostratigraphic Member
    Status
    informal term
    Valid name
    In Short
    Bunte Tonschiefer mit Lagen und Linsen von rotgelb anwitterndem Karbonat.
    Age
    Cisuralian (= Early Permian) - Cisuralian (= Early Permian)
    Thickness
    70-80 m
    Geographical extent
    -
    Type area
    Foostock, Piz Segnes, Piz Grisch
    Comment
    Schlecht gegen die Foostock-Schiefern abzugrenzen. Die «bunte Serie» von G. C. Amstutz (1954: 67) im Kärpfgebiet ist ähnlich ausgebildet (R. Trümpy in: Rutsch et al. 1966).
    • Hahnenstock-Keratophyr Show details

      Origin of the Name

      Hahnenstock = Hanenstock (GL)

      Rank
      lithostratigraphic unit
      Status
      local name (informal)
      Valid name
      In Short
      Meist tektonisch verschieferte, detritisch aufbereitete, trachytische Vulkanitabfolge.
      Age
      Cisuralian (= Early Permian) - Cisuralian (= Early Permian)
      Thickness
      -
      Geographical extent
      Kärpf
      Type area
      -
      Comment
      -
    • Sonnenberg-Horizonte

      Origin of the Name

      Sonnenberg = Sunnenberg (GL) am Kärpf

      Rank
      petrographic facies
      Status
      unknown status
      Valid name
      In Short
      Dunkelgrauer, pyrit- und glimmer-führender Arkosesandstein, dunkler Süsswasserkalk, dunkle Pelit und Konglomeratlagen des «Glarner Verrucano».
      Age
      Cisuralian (= Early Permian) - Cisuralian (= Early Permian)
      Thickness
      Ca. 10 m Intervall (Letsch et al. 2015).
      Geographical extent
      -
      Type area
      -
      Comment
      -
      • Chammseeli-Konglomerat

        Origin of the Name
        -
        Rank
        lithostratigraphic Bed
        Status
        unknown status
        Valid name
        In Short
        -
        Age
        -
        Thickness
        -
        Geographical extent
        -
        Type area
        -
        Comment
        -
    • Chammseeli-Konglomerat

      Origin of the Name
      -
      Rank
      lithostratigraphic Bed
      Status
      unknown status
      Valid name
      In Short
      -
      Age
      -
      Thickness
      -
      Geographical extent
      -
      Type area
      -
      Comment
      -
  • Foostock-Member Show details

    Origin of the Name

    Foostock = Ruchen (GL)

    Rank
    lithostratigraphic Member
    Status
    informal term
    Valid name
    In Short
    Violetter bis grüner Phyllit. Ohne vulkanischen Einlagerungen.
    Age
    Cisuralian (= Early Permian) - Cisuralian (= Early Permian)
    Thickness
    -
    Geographical extent
    -
    Type area
    Foostock, Piz Segnes, Piz Grisch
    Comment
    Die Foostock-Schiefer entsprechen wahrscheinlich dem Sericitphylliten M. Blumenthals (1911) (R. Trümpy in: Rutsch et al. 1966).