Küsnacht-Bentonit

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Representation and status

Index
K
CMYK Color
-
RGB color
R: 255 G: 245 B: 255
Rank
lithostratigraphic Bed
Validity
Unit is in Use
Status
informal term
SCS note
-
SCS date
-
Comment
-

Nomenclature

German
Küsnacht-Bentonit
French
Bentonite de Küsnacht
Italian
Bentonite del Küsnacht
English
Küsnacht Bentonite
Origin of the Name

Küsnachter Tobel (ZH)

Historical Variants
Küsnachter Bentonit-Horizont (Pavoni & Schindler 1981), Küsnacht bentonite (Bolliger 1998a, Kälin & Kempf 2009), Küsnachter Bentonit (Gubler 2009).
Nomenclatorial Remarks
-

Synonyms

Non-synonyms
Possible confusion

Description

Description
Verwitterter, saurer Glasaschentuff
Geomorphology
-
Thickness
-

Components

Lithological content
  • bentonite
Mineral content
-
Fossil content
-

Hierarchy and succession

Superordinate unit
Subordinate units
Units at roof
    -
Units at floor
Lateral equivalents
Upper boundary
-
Lower boundary
-
Stratigraphic discussion
-

Age

Age at top
Langhian
Note about top
-
Age at base
Langhian
Note about base
-
Dating method

14.91 ± 0.09 Ma (U/Pb-Datierung mit Zirkonen ; Gubler et al. 1992), 14.84 ± 0.07 Ma (U/Pb-Datierung mit Zirkonen ; Nagra 2008).

Geography

Geographical extent
Zürichsee-Gebiet (Küsnachtertobel ZH, Erlenbachertobel ZH), Sihltal (Chopf bei Adliswil ZH), Reusstal (Jonentobel ZH, Jonental AR, Oberwil-Lieli AG).
Type area
-
Type locality
  • Küsnachtertobel ZH
    Site particularities
    • upper boundary
    • lower boundary
    • typical facies
    Site accessibility
    • river bed
    Coordinates
    • (2688060 / 1241705)
Type profile
  • Küsnachtertobel ZH
    Site particularities
    • upper boundary
    • lower boundary
    • typical facies
    Site accessibility
    • river bed
    Coordinates
    • (688060 / 241705)
Reference profiles
  • Erlenbach ZH
    Site particularities
    • upper boundary
    • lower boundary
    • typical facies
    Coordinates
    • (2688500 / 1239880)
    Note
    • Datierung Gubler 2009.
  • Oberwil-Lieli AG
    Site particularities
    • upper boundary
    • lower boundary
    • typical facies
    Site accessibility
    • river bed
    Coordinates
    • (2671175 / 1242475)
    Note
    • British Geological Survey / Nagra 2008
Point of interest
  • Chopf bei Adliswil ZH
    Site particularities
    • typical facies
    Coordinates
    • (2682780 / 1239410)
  • Jonentobel ZH
    Site particularities
    • upper boundary
    • lower boundary
    • typical facies
    Site accessibility
    • river bed
    Coordinates
    • (2674640 / 1238970)
  • Seitenbach des Jonentobels AR
    Site particularities
    • upper boundary
    • lower boundary
    • typical facies
    Site accessibility
    • river bed
    Coordinates
    • (2674290 / 1239125)
  • Jonental AR
    Site particularities
    • upper boundary
    • lower boundary
    • typical facies
    Site accessibility
    • river bed
    Coordinates
    • (2673580 / 1239375)

Paleogeography and tectonic

Paleogeography
North Alpine Foreland Basin,
Kind of protolith
  • sedimentary
  • volcanic
Conditions of formation
-
Sequence
-
Tectonic Unit (resp. main category)
Plateau Molasse
Metamorphism
non metamorphic
Metamorphic facies
-
Note on metamorphism
-

References

Definition
-
Revision
-
Important publications
-

Material and varia

Applications
-