Muot-da-Rubi-Formation

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Representation and status

Color CMYK
(0%,8%,50%,2%)
Color RGB
R: 250 G: 230 B: 125
Rank
lithostratigraphic Formation
Validity
Unit is in Use
Status
valid formal name

Nomenclature

Deutsch
Muot-da-Rubi-Formation
Français
Formation du Muot da Rubi
Italiano
Formazione del Muot da Rubi
English
Muot da Rubi Formation
Historical Variants

Muot-da-Rubi Formation (Menkveld et al. 2016)

Description

Description

Ablagerungen des Übergangs zwischen der mergeligen Stad-Formation und der Nordhelvetischen Flysch-Gruppe bzw. den Südhelvetischen Flyschablagerungen.

Hierarchy and sequence

Upper boundary

Taveyannaz-Sandstein (tektonischer Kontakt)

Lower boundary

Stad-Formation

Age

Age at top
  • Priabonian
Note about top

Evtl. bis Rupelian?

Age at base
  • Priabonian
Dating Method

Biostratigraphie: seltene planktonische Foraminiferen.

Geography

Geographical extent
Zentralschweiz und Ostschweiz.
Type locality
  • Kistenstöckli = Muot da Rubi (GR)
    Site particularities
    • typische Fazies
    Site accessibility
    • Grat
    Coordinates
    • (2720650 / 1186350)
    Note
    • Menkveld-Gfeller et al. 2016 (kein Typusprofil).

Palaenography and tectonic

  • Paleogene of the Helvetics
Paleogeography
North Helvetic Domain , South Helvetic Domain
Tectonic unit (resp. main category)
Kind of protolith
  • sedimentary
Metamorphism
non metamorphic

References

Definition
Menkveld-Gfeller Ursula, Kempf Oliver, Funk Hanspeter (2016) : Lithostratigraphic units of the Helvetic Palaeogene: review, new definition, new classification. Swiss J. Geosc. 109/2, 171-199

p.188: The here newly established and defined Muot-da-Rubi Formation combines spatially isolated sedimentary successions that represent the transition from ‘‘Globigerina Marl’’ (Stad Formation) into North- and South Helvetic flysch facies. Type locality is at Muot-da-Rubi/Kistenstöckli (2720.650/1186.350); there is no type section.

The Muot-da-Rubi Formation can be subdivided into several members: Ahornen Member, Kistenstöckli Member, Ghölzwald Member (all North Helvetic); Malor Member, Südelbach Member, (all South Helvetic; Table 2). For further descriptions see Soder (1949; ‘‘Südelbach-Serie‘‘), Styger (1961), Frey (1965; ‘‘Ahornenschichten’’, ‘‘Kistenstöckli-Schichten’’, ‘‘Ghölzwald-Schichten’’, and ‘‘Malor-Schichten’’), and Mayoraz (1995; ‘‘Brèches tertiaires’’).

Lithology: The Muot-da-Rubi Formation incorporates isolated members, which have in common that they show a facies transition of the silty-marly Stad Formation into flysch sediments through the appearance of turbidic sandstone beds and breccia layers. (See description of the individual members.) The Muot-da-Rubi Formation can be found in the North- and South Helvetic depositional areas. Overlying strata: Taveyannaz Formation, tectonic boundary; underlying strata: Stad Formation. Biostratigraphy: Priabonien to ?Rupelian, planktonic foraminifera (very rare). Current geographical extent: See individual members. Tectonic unit: See individual members.

  • Ahornen-Member

    Name Origin

    Ahornenrus (heute Malorrus) (GL)

    Rank
    lithostratigraphic Member (Subformation)
    Status
    valid formal name
    In short

    Sandstein mit Erstvorkommen von grünen Gesteinsfragmenten. Plattiger Mergelstein an der Basis.

    Age
    Priabonian
  • Kistenstöckli-Member

    Name Origin

    Kistenstöckli = Muot da Rubi (GR)

    Rank
    lithostratigraphic Member (Subformation)
    Status
    valid formal name
    In short

    Mikrokonglomerat mit Geröllen aus nordhelvetischen Einheiten (Spätjura, Kreide, Paläogen), gefolgt von einer Wechsellagerung aus einem glimmerreichen, sandigen Kalk und einem feinsandigen, plattigen Mergelstein.

    Age
    Priabonian
  • Ghölzwald-Member

    Name Origin

    Ghölzwald (GL), N Stelli

    Rank
    lithostratigraphic Member (Subformation)
    Status
    valid formal name
    In short
    Glimmerreicher, sandiger Kalk und kalkiger, glimmerreicher Sandstein.
    Age
    Priabonian
  • Malor-Member

    Name Origin

    Malorrus = Ahornenrus (GL)

    Rank
    lithostratigraphic Member (Subformation)
    Status
    valid formal name
    In short
    Plattiger Mergel mit eingeschaltetem, feinem Sandstein und Glimmersandstein (lokal auch Konglomeratlagen).
    Age
    Priabonian
  • Südelbach-Member

    Name Origin

    Südelbach / Südelgraben (LU), W Sörenberg

    Rank
    lithostratigraphic Member (Subformation)
    Status
    valid formal name
    Nomenclatorial Remarks
    <p>sog. Ruhiger Obereocaenflysch, Flysch der Basalen Schuppe (Gigon 1952) ; siehe auch Eckert 1963</p>
    In short

    Mergelstein (unten), welcher in einen siltigen Kalk mit gradierten, klastischen Bänken übergeht. Gröbere polymikte Brekzien und Corallinaceen-Kalke treten auch vor.

    Age
    Priabonian
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