Hasli-Formation

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Representation and status

Index
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CMYK Color
-
RGB color
R: 215 G: 180 B: 190
Rank
lithostratigraphic Formation
Validity
Unit is in Use
Status
informal term
SCS note
-
SCS date
-
Comment
-

Nomenclature

German
Hasli-Formation
French
-
Italian
-
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)
Nomenclatorial Remarks
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Synonyms

Synonyms
Non-synonyms
Possible confusion

Description

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

Components

Lithological content
-
Mineral content
-
Fossil content
-

Hierarchy and succession

Superordinate unit
Subordinate units
Units at roof
    -
Units at floor
Lateral equivalents
Upper boundary
-
Lower boundary
Irchel-Schotter s.s. im NW, Steig-Dolomitschotter im SE.
Stratigraphic discussion
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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).

Geography

Geographical extent
Hügel Irchel (ZH).
Type area
-
Type locality
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Type profile
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Reference profiles
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Point of interest
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Paleogeography and tectonic

Paleogeography
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Kind of protolith
-
Conditions of formation
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Sequence
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Tectonic Unit (resp. main category)
Höhere Deckenschotter
Metamorphism
-
Metamorphic facies
-
Note on metamorphism
-

References

Definition
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Revision
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

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).

Material and varia

Applications
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  • Fossilhorizont Irchel-Hasli Show details

    Origin of the Name

    Hasli am SE Hügel Irchel (ZH)

    Rank
    biostratigraphic horizon
    Status
    valid
    Valid name
    In Short
    Fossilführende, dunkelbraune, tonig-siltige Lage innerhelb der Hasli-Fm.
    Age
    Gelasian - Gelasian
    Thickness
    -
    Geographical extent
    SE Hügel Irchel (ZH)
    Type area
    -
    Comment
    -