«Spatkalk» (des Hauptrogensteins)

Representation and status

Color CMYK

siehe Hauptrogenstein

Color RGB

R: 210 G: 185 B: 135

Rank

lithostratigraphic Member (Subformation)

Validity

Unit is in Use

Status

incorrect name (though informally used)

Status discussion

Bei Gonzalez (1993) als Formationsglied [= Member] definiert.

Nomenclature

Deutsch

«Spatkalk» (des Hauptrogensteins)

Français

«Spatkalk» (Hauptrogenstein)

Italiano

«Spatkalk» (Hauptrogenstein)

English

«Spatkalk» (Hauptrogenstein)

Historical Variants

Spatkalk (Moesch 1867, Mühlberg 1898, Gonzalez 1993, Gonzalez & Wetzel 1996), Spatkalk mit Ostrea Knorri = Knorri-Spatkalk (Mühlberg 1900), Knorri-Spathkalk (Tobler 1905 Tab.6b)

Links

Non-synonyms

«Spatkalk-Bank»

Description

Description

Der oft grobe, bioklastische und ausschliesslich aus Echinodermentrümmern (hauptsächlich Crinoidenstielgliedern) mit Nester von Limonit ("eisenschüssige Spatkalke") bestehende Kalk ist dünnplattig und hart.

Thickness

2-12 m (Gonzalez & Wetzel 1996), Weniger als 1 m bis 22 m.

Components

• echinoderms

Hierarchy and sequence

Superordinate unit

• Hauptrogenstein [CH]

Subordinate units

• «Obere Crinoiden-Schichten»

Units at roof

• «Varians-Schichten»

Units at floor

• Couches de Movelier

Upper boundary

angebohrte Regressionsfläche

Age

Age at top

• middle Bathonian

Age at base

• early Bathonian

Dating Method

Biostratigraphie: Ammoniten

Geography

Geographical extent

Aargauer Jura. Der Spatkalk geht nach Westen in den «Ferrugineus-Oolith» und nach Osten in den «Knorri-Ton» (Klingnau-Fm.) über.

Type area

Aargauer Jura

Type profile

• Cheisacherloch = Cheisackerloch (AG), bei Sulz
  Site particularities
  • typische Fazies
  Coordinates
  • (2650600 / 1264000)
  Note
  • <p>Typusprofil des Spatkalks des Hauptrogensteins (Moesch 1867, Gonzalez 1993)</p>

Point of interest

• Steinbruch Flüeli (AG), Schellenbrücke
  Site particularities
  • Obergrenze
  • Untergrenze
  • typische Fazies
  Site accessibility
  • Steinbruch, Tongrube
  Coordinates
  • (2646425 / 1252910)
  Note
  • Wildi 1983 S.57

Palaenography and tectonic

• Dogger of the Jura Mountains

Paleogeography

Northern Tethyan Carbonate Platform :
Plateforme de Bourgogne, ... = Northern Tethyan Carbonate Platform (NTCP)

Tectonic unit (resp. main category)

• Jura :
  Juragebirge

Kind of protolith

• sedimentary

Metamorphism

non metamorphic

References

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.709: The "Spatkalk" dominates the top of the Hauptrogenstein Formation from the eastern Jura to the Lägern Chain (Fig. 4). Its thickness varies between 2 and 12 m (values included in Fig. 5c). Characteristic are bioclastic (usually coarse echinoderm fragments), often strongly limonitic pack- to grainstones with mm to dm thick marls as background sediments.