Muot-da-Rubi-Formation

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

Origin of the Name

Muot da Rubi = Kistenstöckli (GR)

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

Subordinate units

• Ahornen-Member
• Kistenstöckli-Member
• Ghölzwald-Member
• Malor-Member
• Südelbach-Member

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 area

Glarner Alpen (GL)/(GR) [Aar-Massiv]

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)

• Östliches Helvetikum :
  u.a. Glarner Alpen
• Zentrales Helvetikum :
  u.a. Berner Oberland

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.