Leist-Mergel

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Representation and status

Color CMYK
(0%,0%,0%,100%)
Color RGB
R: 205 G: 215 B: 55
Rank
lithostratigraphic Member (Subformation)
Validity
Unit is in Use
Status
local name (informal)

Nomenclature

Deutsch
Leist-Mergel
Français
Marne du Leist
Italiano
Marna del Leist
English
Leist Marl
Origin of the Name

Alp Leist (SG), östlich Amden

Historical Variants

Senon-Mergel, Leistmergel (Arn. Heim & Oberholzer 1907, Arn. Heim 1923, Oberhauser 1958, Alexander et al. 1965), obere Leistschiefer mit Leistmergeln (Rollier 1923), Leist-Mergel

Description

Thickness
100-200 m (Alexander et al. 1965), bis 250 m (Tollmann 1985)

Components

Fossil Content
  • foraminifera
  • bivalves

Globotruncana lapparenti Bolli, Globotruncana ventricosa carinata Dalbiez, Globotruncana globigerinoides Brotzen, Bolivinoides strigillata (Champm.), Stensioina exculpta (Rss.), Ventilabrella decoratissima De Klasz. (Lange 1956); Inoceramen

Hierarchy and sequence

Superordinate unit
Subordinate units

Age

Age at top
  • Campanian
Age at base
  • Santonian
Dating Method

Foraminiferen, Inoceramen

Geography

Geographical extent
Auf den süd- und ultrahelvetischen Faziesraum beschränkt.

Palaenography and tectonic

  • Upper Cretaceous
  • Cretaceous of the Helvetics
Paleogeography
North Tethyan Shelf :
marge continentale européenne
Tectonic unit (resp. main category)
Kind of protolith
  • sedimentary
  • Grotzen-Austernbank

    Name Origin

    Grotzen = Rotgrotzen (SZ)

    Rank
    lithostratigraphic Bed
    Status
    informal term
    In short

    Dünne, austernführende, siltig-kalkige Lagen (vermutlich Resedimente) in den Mergeln der Amden-Formation.

    Age
    Santonian
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