Hauptmumienbank-Member

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Representation and status

Index
-
CMYK Color
siehe Vellerat-Formation
RGB color
R: 170 G: 190 B: 165
Rank
lithostratigraphic Member
Validity
Unit is in Use
Status
valid formal name
SCS note
-
SCS date
-
Comment
-

Nomenclature

German
Hauptmumienbank-Member
French
Membre du Hauptmumienbank («Oolithe nuciforme»)
Italian
Membro del Hauptmumienbank
English
Hauptmumienbank Member
Origin of the Name
Mumien sind Onkoiden mit ein Fossil als Kern (Steinmann 1880).
Historical Variants
Calcaires blanchâtres à grosses oolithes (Rollier 1888a), Mumienbank (Rothpletz 1933), Hauptmumienbank (Ziegler 1956 S.41, Bolliger & Burri 1970 S.72, Heckendorn 1974), Hauptmumienbank Member (Gygi 2000b, Gygi 2000c), Oolithe nuciforme
Nomenclatorial Remarks
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Synonyms

Synonyms
Non-synonyms
Possible confusion

Description

Description
Leithorizont im mittleren Teil (bzw. im Dach) der Vellerat-Formation, bestehend aus dickbankigen, harten und massiven hellgrauen, mikritischen Kalksteinen, welche lokal zahlreichen Onkoiden (5 bis 20 mm gross) aufweisen. Nach Osten eher gelblicher Oosparit und Pelsparit, manchmal dolomitisch.
Geomorphology
Markante Rippe oder Stufe. Deutlich herauswitternder Kartierhorizont über dem Röschenz-Member.
Thickness
5-7 m, bis 10 m gegen NW (Aufranc et al. 2017).

Components

Lithological content
  • limestone
Mineral content
-
Fossil content
  • corals
  • brachiopods
  • bivalves

Hierarchy and succession

Superordinate unit
Formation de Vellerat
Subordinate units
Lateral equivalents
Upper boundary
-
Lower boundary
Röschenz-Mb.
Stratigraphic discussion
-

Age

Age at top
late Oxfordian
Note about top
-
Age at base
late Oxfordian
Note about base
-
Dating method
keine

Geography

Geographical extent
Zentraler Schweizer Jura. (Aussi présent en Franche-Comté sous forme de banc à oncoïdes algaires vers Pontarlier ou à oncoïdes à nubéculaires et bioclastes plus au nord.)
Type area
-
Type locality
-
Type profile
  • Chapelle de Vorbourg (JU)
    Site particularities
    • upper boundary
    • lower boundary
    • typical facies
    Site accessibility
    • road cut
    Coordinates
    • (2593830 / 1247580)
    Note
    • Gygi 2000b Pl.23 Profil RG366 Schichten 67-73
Reference profiles
  • Les Breuleux (JU)
    Site particularities
    • typical facies
    Site accessibility
    • road cut
    Coordinates
    • (2567100 / 1230010)
    Note
    • Strasse Les Breuleux-Le Roselet, Kote 1060 m
Point of interest
-

Paleogeography and tectonic

Paleogeography
Argovian Basin, Swabian Basin,
Kind of protolith
  • sedimentary
Conditions of formation
- Mit dem Ausklingen der Tonschüttung war das einstige Relief durch das Röschenz-Member, die Günsberg-Formation und das Effingen-Member weitgehend ausgeglichen und erstreckte sich weit in Richtung des argovisch-schwäbischen Beckens. Im untiefen, wenig bewegten Wasser folgte bis ans Ende der Jurazeit eine Phase fast reiner Karbonatproduktion, beginnend mit der sich weit hinauserstreckenden Hauptmumienbank.
Sequence
-
Tectonic Unit (resp. main category)
Jura
  • Southern Germany
  • Black Forest
Metamorphism
non metamorphic
Metamorphic facies
-
Note on metamorphism
-

References

Definition
Ziegler P. (1956): Geologische Beschreibung des Blattes Courtelary (Berner Jura) S.A. Blatt 118, Gebiet nördlich der Suze und zur Stratigraphie des Sequanien im Zentralen Schweizer Jura , Beitr. geol. Karte Schweiz (N.F.) 102

S.42
Revision
Gygi R. A. (2000): Annotated index of lithostratigraphic units currently used in the Upper Jurassic of northern Switzerland. , Eclogae geol. Helv. 93/1, 125-146

p.132: Hauptmumienbank Member (Ziegler 1956) ; Member of the Vellerat Formation ; Synonymy: Gygi (2000b, p. 59) The name "Hauptmumienbank" was introduced by Ziegler (1956. p. 42). It means main mummy bed. Steinmann (1880, p.152) called an oncoid a mummy when the core is a recognizeable macrofossil. Gygi & Persoz (1986. p. 4(X)) used the term Hauptmumienbank Member for the whole limestone succession between the marls and marly limestones of the Röschenz Member (Gygi 1995. p. 11) below and the Bure Member (Gygi 1995. p. 11) or Oolithe rousse Member above. Ziegler (1956) did not designate a type section. The best section accessible to the public is now section RG 366 near Vorbourg chapel at Delémont. LK 1086 Delémont. The Hauptmumienbank Member there crops out along the road at coordinates 593.830/247.580. This is section RG 366 in Gygi (2000b. PI. 23). Beds no. 67-73 of the succession at this locality can be regarded as type section ofthe Hauptmumienbank Member. The member in section RG 366 at Delémont is underlain by the marly Röschenz Member and overlain by the Oolithe rousse Member. The thickness of the Hauptmumienbank Member is normally only a few meters, but it may grow to more than 10 m where it grades laterally into the Steinebach Member as in section RG 381 in Court gorge at Moutier BE (Pl. 28 in Gygi 2000b). (...) The oncoid content is normally greatest near the top of the member. There are no ammonites to date the Hauptmumienbank Member biochronologically. Gygi & Persoz (1986. Pl.IA) indicated with clay minerals that the oolitic Steinebach Member and the basinal Geissberg Member are time equivalents of the Hauptmumienbank Member. Gygi (1995. Fig. 23) could prove with an ammonite from the upper Geissberg Member at Olten that these three members belong to the later part of the Hypselum Subchron (Gygi 1995. Fig. 2). The great geographic range of the Hauptmumienbank Member can be read from Ziegler (1956. Fig. 12) and Gygi (1990c. Fig. 7).
Important publications
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Material and varia

Applications
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