«Unterer Öhrli-Kalk»

Representation and status

Index
UÖK
Color CMYK
(32%,0%,15%,33%)
Color RGB
R: 115 G: 170 B: 145
Rank
lithostratigraphic Member (Subformation)
Validity
Unit is in Use
Status
incorrect name (though informally used)

Nomenclature

Deutsch
«Unterer Öhrli-Kalk»
Français
«Calcaire d'Öhrli inférieur»
Italiano
«Calcare dell'Öhrli inferiore»
English
«Lower Öhrli Limestone»
Origin of the Name

Öhrli (AI), Alpstein

Historical Variants

Lower Oerlikalk, Unterer Örhlikalk (Schindler 1959), Oehrlischichten = Oehrlikalk? (Spörli 1966), lower Oehrli Limestone (Föllmi et al. 2007)

Description

Description

Rostbräunlich anwitternder, bröckeliger, sandiger Kalk im unteren Teil der Öhrli-Formation.

Thickness
Max. 50 m (Föllmi et al. 2007).

Components

Fossil Content
  • corals
  • echinoderms
  • algae
  • foraminifera

Hierarchy and sequence

Age

Age at top
  • Late Berriasian
Age at base
  • Middle Berriasian

Geography

Type area
Alpstein (AI/AR/SG)

Palaenography and tectonic

  • Neocomian
  • Cretaceous of the Helvetics
Paleogeography
Northern Tethyan Carbonate Platform :
Plateforme de Bourgogne, ... = Northern Tethyan Carbonate Platform (NTCP)
Tectonic unit (resp. main category)
Kind of protolith
  • sedimentary
Conditions of formation

prograding shallow-water platform carbonates

References

Definition
Föllmi Karl B., Bodin Stephane, Godet Alexis, Linder Pascal, van de Schootbrugge B. (2007) : Unlocking paleo- environmental information from Early Cretaceous shelf sediments in the Helvetic Alps: stratigraphy is the key! Swiss J. Geosci. 100, 349-369

p.5: The lower Oehrli Limestone consists of calcareous pack- and grainstone including peloids, green algae (Dasycladaceae), benthic foraminifera, corals and echinoderms, and reaches a maximal thickness of approximately 50 m (Ischi 1978; Burger & Strasser 1981; Burger 1985, 1986; Mohr 1992a; Mohr & Funk 1995).

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