Steig-Dolomitschotter

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Representation and status

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

German
Steig-Dolomitschotter
French
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Italian
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English
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Origin of the Name

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

Historical Variants
Irchel-Dolomitschotter (Graf 1993), Steig-Schotter (Preusser et al. 2011)
Nomenclatorial Remarks
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Synonyms

Synonyms
Non-synonyms
Possible confusion

Description

Description

Graf 2000: Im SE des Irchel werden die älteren Schotter erosiv durch eine jüngere Schüttung abgeschnitten. Diese zeichnet sich durch eine Paläoströmung nach N und einen auffälligen Reichtum an Dolomitgeröllen aus (10-15%).

Geomorphology
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Thickness
Ca. 10 m.

Components

Lithological content
  • gravel : grains > 2 mm (visible to the naked eye ; rock = rudite: conglomerate or breccia)
Mineral content
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Fossil content
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Hierarchy and succession

Superordinate unit
Subordinate units
Units at roof
    -
Units at floor
Lateral equivalents
Upper boundary
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Lower boundary
Erosive Basis über Irchel-Schotter oder Molasse.
Stratigraphic discussion
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Age

Age at top
Early Pleistocene
Note about top
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Age at base
Early Pleistocene
Note about base
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Dating method
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Geography

Geographical extent
SE Hügel Irchel (ZH).
Type area
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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
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Conditions of formation
Schüttung in N Richtung.
Sequence
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Tectonic Unit (resp. main category)
Höhere Deckenschotter
Metamorphism
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Metamorphic facies
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Note on metamorphism
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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

The glaciofluvial gravel on top (‘Irchel-Schotter’) is cut by a channel-like structure in the SE. This channel is filled by younger glaciofluvial gravel (‘Steig-Schotter’) showing a prominent difference in petrography compared to the two older units. This implies that erosion was not a local phenomenon but rather indicates reorganisation of the entire drainage network.

Important publications
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Material and varia

Applications
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