«Basismergelzone» (Napf)

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Representation and status

Index
m4b
Color CMYK
N/A
Color RGB
R: 125 G: 125 B: 125
Rank
lithostratigraphic Member (Subformation)
Validity
Unit is not in Use
Status
incorrect term (disused)

Nomenclature

Deutsch
«Basismergelzone» (Napf)
Français
«Marnes basales» (Napf)
Italiano
«Marni basali» (Napf)
English
«Basal Marls» (Napf)
Historical Variants

Basismergelband (Fröhlicher 1933), Basismergelzone (Matter 1964), Basismergel der Hundschüpfenschichten (della Valle 1965), Basismergel der Napfschichten (Ninck 2005)

Hierarchy and sequence

Subordinate units
Units at roof
Upper boundary

Napf-Nagelfluh

Lower boundary

Schüpferegg-Nagelfluh

Age

Age at top
  • late Burdigalian
Note about top

MN 4b

Age at base
  • late Burdigalian
Note about base

MN 4b

Dating Method

Kleinsäuger (Kälin 1997c)

Geography

Geographical extent
Leithorizont im Napf-Schuttfächer.
Type area
Napf-Gebiet

Palaenography and tectonic

  • OSM-I
Kind of protolith
  • sedimentary

References

Definition
Fröhlicher H. (1933) : Geologische Beschreibung der Gegend von Escholzmatt im Entlebuch (Kt. Luzern). Beitr. geol. Karte Schweiz N.F. 67, 63 Seiten
Definition
Kälin Daniel, Kempf Oliver (2009) : High-resolution stratigraphy from the continental record of the Middle Miocene Northern Alpine Foreland Basin of Switzerland. N. Jb. Geol. Paläont. Abh. 254/1-2, 177-235

Schüpferegg conglomerate and Napf beds are separated by the «basal marls» (MATTER 1964), which form a widespread and laterally continuous characteristic zone of marls and siltstones. These basal marls have yielded several mammal sites, all revealing an MN 4b-age (KÄLIN 1997c). Because of its extensive lateral continuity, this characteristic zone also forms a usefull marker horizon within the Napf alluvial fan.

  • «Ophiolith-Nagelfluh»

    Rank
    petrography
    Status
    informal term
    Show details

  • Blapbach-Kohleflöz

    Name Origin

    Blapbach (BE)

    Rank
    lithostratigraphic Bed
    Status
    local name (informal)
    In short

    Regionaler kohlenführender Leithorizont an der Basis der OSM des Napfgebietes. Tritt mit Mergel und Süsswasserkalk in der nagelfluh-reichen Abfolge vor.

    Age
    Burdigalian
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