«Subfurcatum-Bank»

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Representation and status

Color CMYK
(0%,17%,34%,31%)
Color RGB
R: 175 G: 145 B: 115
Rank
lithostratigraphic Bed
Validity
Unit is in Use
Status
incorrect name (though informally used)
Status discussion

Nomenclature

Deutsch
«Subfurcatum-Bank»
Français
«Banc à Subfurcatum»
Italiano
«Strato di Subfurcatum»
English
«Subfurcatum Bed»
Origin of the Name

Namengebendes Fossil: Ammonitenart Garantiana (Pseudogarantiana) subfurcata (Zieten 1830) [früher Strenoceras].

Historical Variants

Subfurcatenschichten (Schalch 1897, Schalch 1916, Tobler 1905 Tab.6b), Subfurcaten-Schichten (Frank 1939, Schmassmann 1945), Obere Blagdenischichten = couches à Strenoceras subfurcatum = calcaires de Minversheim (Théobald 1948), Subfurcaten Beds = Subfurcaten Schichten = Couches à subfurcatum (Gonzalez & Wetzel 1996)

Description

Description

Knauerige Schillkalklage mit Pseudomonotis echinata Sowerby an der Basis zwischen Klingnau und Zurzach/Achenberg (Tafeljura).

Thickness
Wenige cm bis dm mächtig (Gonzalez & Wetzel 1996).

Components

Fossil Content
  • ammonites

Hierarchy and sequence

Superordinate unit
Units at roof
Units at floor
Upper boundary

Untere Parkinsoni-Schichten

Lower boundary

Blagdeni-Schichten

Age

Age at top
  • late Bajocian
Age at base
  • late Bajocian
Dating Method

Biostratigraphie: Ammoniten der Niortense/Subfurcatum-Zone (Gonzalez & Wetzel 1996)

Geography

Geographical extent
Westgrenze: Linie Gansingen-Schinznach, Ostgrenze: nicht definiert (Landesgrenze?).
Type profile
  • Eschenhau b. Schleitheim (SH)
    Coordinates
    • (2681600 / 1289650)
    Note
    • Schalch 1897 und 1916, Schmassmann 1945, Gonzalez 1933 (anstatt Tuniberg in Mühlberg 1900).
Reference profiles

Palaenography and tectonic

  • Dogger of the Jura Mountains
Paleogeography
Swabian Basin
Tectonic unit (resp. main category)
Kind of protolith
  • sedimentary
Metamorphism
non metamorphic

References

Definition
Schalch F. (1897) : Der braune Jura (Dogger) des Donau-Rheinzuges. Mitt. Grossh. Badischen Geol. Landesanstalt, III/3, 528-773
Definition
Gonzalez R., Wetzel A. (1996) : Stratigraphy and paleogeography of the Hauptrogenstein and Klingnau Formations (middle Bajocian to late Bathonian), northern Switzerland Eclogae geol. Helv. 89/2, 695-720

p.704: Three lithologically similar horizons can be discriminated within the Klingnau Formation. They are all a few centimeters to decimeters thick and consist of bioturbated bioclastic beds often containing ammonites: the Subfurcaten Beds at the top of the lower third of the succession (Niortense/Subfurcatum Zone), and the Lower and Upper "Parkinsonien Bank" (...) The occurrence of these horizons is somewhat patchy, but they serve as excellent correlation horizons where they occur.
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