Unterer Teil des Grünten-Members

Representation and status

Rank

lithostratigraphic unit

Validity

Unit is not in Use

Status

incorrect name (though informally used)

Nomenclature

Deutsch

Unterer Teil des Grünten-Members

Français

Partie inférieure du Membre du Grünten

English

Lower part of the Grünten Member

Historical Variants

lower part of the Grünten Member (Föllmi et al. 2007)

Description

Thickness

Max. ca. 15 m

Hierarchy and sequence

Superordinate unit

• Grünten-Member

Units at roof

• Banc du Col de la Plaine Morte

Units at floor

• Rohrbachstein-Bank

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.12: The lower part of the Grünten Member overlying the Rohrbachstein Bed consists of a quartz- and glauconite-containing marl or marly carbonate, which is rich in echinodermal debris and reworked and partly micritized Schrattenkalk extraclasts. This unit is limited to the southern areas within
the Helvetic realm and reaches a maximum thickness of about 15 m. In the Rawil area, the lower part of the Grünten Member is covered by a thin, nodular glauconite- and phosphate-containing layer, in which sparse phosphate particles occur [Plaine Morte Bed].