Irchel-Schotterkomplex

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Representation and status

Color CMYK
(0%,17%,12%,18%)
Color RGB
R: 210 G: 175 B: 185
Rank
lithostratigraphic Subgroup
Validity
Unit is in Use
Status
incorrect name (though informally used)

Nomenclature

Deutsch
Irchel-Schotterkomplex
Français
Complexe graveleux de l'Irchel
Italiano
Complesso ghiaioso dell'Irchel
English
Irchel Gravel Complex
Origin of the Name

Hügel Irchel nordöstlich Bülach (ZH)

Historical Variants

Irchel-Schotter (Graf 1993, Preuss et al. 2011), Deckenschotter des Irchel (Bolliger et al. 1996), Irchel-Schotter s.l.

Description

Thickness
Max. 40 m (Bolliger et al. 1996).

Hierarchy and sequence

Upper boundary

Hasli-Formation (lokal Steig-Schotter) oder topographische Oberfläche.

Lower boundary

Molasse, lokal Langacher-Schotter.

Age

Age at top
  • Early Pleistocene
Age at base
  • Piacenzian
Dating Method

Kleinsäuger-Fauna und Magnetostratigraphie des späten Pliozäns = MN17 (Bolliger et al. 1996).

References

Definition
Preusser Frank, Graf Hans Rudolf, Keller Oskar, Krayss Edgar, Schlüchter Christian (2011) : Quaternary glaciation history of northern Switzerland. E&G Quaternary Science Journal 60/2-3, 282-305

p.285: Irchel

The Quaternary deposits at Irchel, a tabular hill in northernmost Switzerland (Fig. 1), are a typical example of ‘Höhere Deckenschotter’ (Graf 1993). The hill reaches for about 5 km from SE to NW, and Pleistocene deposits are found on top of Molasse bedrock, at an elevation between 620 m and 650 m a.s.l., thus about 300 m above the present drainage level.

The Quaternary deposits are subdivided into five units, four of which represent glaciofluvial outwash-gravel (Fig. 3). Petrographical analyses indicate an origin of the sediment from the Walensee-Rhine-System. (...)

  • Forenirchel-Schotter

    Name Origin

    Forenirchel (ZH)

    Rank
    lithostratigraphic Formation
    Status
    informal term
    In short
    Abschliessender glazifluviatiler Schotter der Irchel-Schotter s.l., welcher sich durch fehlende Dolomite sowie wenig Kristallin und Quarzgeröllen auszeichnet.
    Age
    Early Pleistocene
  • Hasli-Formation

    Name Origin

    Hasli am SE Hügel Irchel (ZH)

    Rank
    lithostratigraphic Formation
    Status
    informal term
    In short
    Lage von Hochflutsedimenten und Rinnenfüllungen, welche über die gesamte Länge des Irchels verbreitet ist.
    Age
    Gelasian
    • Fossilhorizont Irchel-Hasli

      Name Origin

      Hasli am SE Hügel Irchel (ZH)

      Rank
      biostratigraphic horizon
      Status
      valid
      In short
      Fossilführende, dunkelbraune, tonig-siltige Lage innerhelb der Hasli-Fm.
      Age
      Gelasian
  • Steig-Dolomitschotter

    Name Origin

    Steig oberhalb von Dättlikon (ZH), östliche Ende des Irchels

    Rank
    lithostratigraphic Formation
    Status
    informal term
    In short
    Glazifluviatiler Schotter, reich an Dolomitgeröllen.
    Age
    Early Pleistocene
  • Irchel-Schotter (s.s.)

    Name Origin

    Hügel Irchel nordöstlich Bülach (ZH)

    Rank
    lithostratigraphic Formation
    Status
    informal term
    In short

    Glazifluviatiler Schotter des Walensee-Rhein-Systems, der den grössten Teil des Irchel-Schotterkomplexes bildet.

    Age
    Early Pleistocene
  • Langacher-Schotter

    Name Origin

    Langacher = Langacker (ZH) am Nordhang des Irchels

    Rank
    lithostratigraphic Formation
    Status
    informal term
    In short

    Unterster (und ältester) Schotter des Irchel-Schotterkomplexes, mit Caliche im Dach.

    Age
    Early Pleistocene
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