«Unterer Seewerkalk»

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Representation and status

Color CMYK
N/A
Color RGB
R: 125 G: 125 B: 125
Rank
lithostratigraphic unit
Validity
Unit is not in Use
Status
incorrect name (though informally used)
Status discussion

Nomenclature

Deutsch
«Unterer Seewerkalk»
Français
«Calcaire inférieur de Seewen»
Italiano
«Calcare inferiore di Seewen»
English
«Lower Seewen Limestone»
Historical Variants

Unterer Seewen Kalk (Paulcke 1906), unterer Seewerkalk (Herb 1965), Calcaires sublithographiques en bancs (Villars 1992)

Hierarchy and sequence

Subordinate units
Upper boundary

Roter Seewerkalk

Lower boundary

Garschella-Formation

Age

Age at top
  • Turonian
Age at base
  • Cenomanian

Geography

Geographical extent
Amden (Herb 1965) + Bornes, Aravis, Platé (Villars 1992).

Palaenography and tectonic

Tectonic unit (resp. main category)
Kind of protolith
  • sedimentary

  • Untere Götzis-Bank

    Name Origin
    Götzis (Österreich)
    Rank
    lithostratigraphic Bed
    Status
    incorrect name (though informally used)
    In short
    Resedimentierte glaukonitisch-sandige Einschaltungen («Grünsand») im unteren, gebankten Teil der Seewen-Formation (direkt über den OAE-2). Im proximalen Bereich häufig mit Lithoklasten aus der Garschella-Formation.
    Age
    Latest Cenomanian
    Show details

  • Bonarelli level (OAE-2)

    Name Origin

    Named after the Italian geologist Guido Bonarelli (1871-1951).

    Rank
    Oceanic Anoxic Event
    Status
    valid
    In short

    Oceanic anoxic event at the Cenomanian/Turonian boundary (around 93 Ma ago) with a major impact on the chemistry of the oceans worldwide. This event correlates with a marine extinction event.

    Age
    Late Cenomanian
    Show details
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