Séquanien supérieur

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Representation and status

Index
i6c
Color CMYK
N/A
Color RGB
R: 125 G: 125 B: 125
Rank
lithostratigraphic unit
Validity
Unit is not in Use
Status
obsolete term (disused)

Nomenclature

Deutsch
Oberes Sequan
Français
Séquanien supérieur
Italiano
Sequaniano superiore
English
Upper Sequanian
Historical Variants
Ober-Sequan, Oberséquanien, Oberes Sequan (Tobler 1896), marno-calcaires gris à ammonites = Zone à Perisphinctes Achilles (Custer 1935), Séquanien supérieur = Zone à Perisphinctes Achilles (Aubert 1941, Falconnier 1951), Séquanien supérieur (Bourquin 1946, Aubert 1963)

Description

Description
calcaires spathiques, oolithiques ou coralligènes >OU< marno-calcaires gris et marnes feuilletées (Falconnier 1951)
Thickness
30 m (Falconnier 1951), 50-110 m

Hierarchy and sequence

Superordinate unit
Subordinate units

Age

Age at top
  • Early Kimmeridgian
Note about top
Zone à Perisphinctes achilles
Age at base
  • late Oxfordian

Palaenography and tectonic

Tectonic unit (resp. main category)
Kind of protolith
  • sedimentary
Conditions of formation
"séquanien"
Metamorphism
non metamorphic

  • Verena-Member

    Name Origin

    Einsiedelei St. Verena (SO), N Solothurn

    Rank
    lithostratigraphic Member (Subformation)
    Status
    valid formal name
    In short

    Gelblich-weisser bis schneeweisser, massiger Komplex im Dach der Balsthal-Formation, bestehend aus kreidigem Kalkarenit, welcher kaum gebankt ist. Echte Ooide fehlen. Lokal treten pisolithische Kalke auf (z.B. Muriaux).

    Age
    late Oxfordian
    Show details
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