Hasli-Formation

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Representation and status

Color CMYK
(0%,16%,12%,16%)
Color RGB
R: 215 G: 180 B: 190
Rank
lithostratigraphic Formation
Validity
Unit is in Use
Status
informal term

Nomenclature

Deutsch
Hasli-Formation
Français
Formation de Hasli
Italiano
Formazione di Hasli
English
Hasli Formation
Origin of the Name

Hasli am SE Hügel Irchel (ZH)

Historical Variants
Überschwemmungsablagerungen (Graf 1993, Bolliger et al. 1996), Schwemmebenen-Ablagerungen (Graf 2000), Hasli-Formation (Preuss et al. 2011)

Description

Thickness
2-7 m (Preuss et al. 2011) ; ca. 4 m (Bolliger et al. 1996).

Components

Fossil Content
  • vertebrates
  • gastropods

Hierarchy and sequence

Upper boundary
Forenirchel-Schotter.
Lower boundary
Irchel-Schotter s.s. im NW, Steig-Dolomitschotter im SE.

Age

Age at top
  • Gelasian
Note about top
MN17
Age at base
  • Gelasian
Note about base
MN17
Dating Method
Kleinsäuger-Fauna und Magnetostratigraphie (Bolliger et al. 1996, Preusser et al. 2011).

Geography

Geographical extent
Hügel Irchel (ZH).

Palaenography and tectonic

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

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: All over Irchel, the two previous units (‘Irchel-Schotter´, ´Steig-Schotter’) are covered by overbank and channel fill deposits of a meandering river system, with a thickness between 2 m and 7 m (‘Hasli-Formation’). These deposits document a phase of warm environmental conditions of a flood plain. The overbank deposits bear land snails and, of particular importance, vertebrate remains. The presence of Mimomys cf. pliocaenicus, M. reidi/pitymyoides, Borsodia, and Lagurodon, together with the absence of Microtus, is interpreted to indicate a correlation with Mammalian Neogen zone (MN) 17 (Gelasian), representing an age of 2.6–1.8 Ma (Bolliger et al. 1996).

  • 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
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