Steig-Dolomitschotter
Torna a Höhere DeckenschotterRappresentazione e statuto
- Colore CMYK
- (0%,16%,12%,16%)
- Colore RGB
- R: 215 G: 180 B: 190
- Rango
- Formazione litostratigrafica
- Uso
- Unità in uso.
- Status
- termine informale
Nomenclatura
- Deutsch
- Steig-Dolomitschotter
- Français
- Gravier du Steig
- English
- Steig Gravel
- Origine del nome
-
Steig oberhalb von Dättlikon (ZH), östliche Ende des Irchels
- Varianti storiche
- Irchel-Dolomitschotter (Graf 1993), Steig-Schotter (Preusser et al. 2011)
Descrizione
- Descrizione
-
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%).
- Potenza
- Ca. 10 m.
Componenti
- dolomite
Gerarchia e successione
- Unità sovrastante
- Limite superiore
- Hasli-Formation
- Limite inferiore
- Erosive Basis über Irchel-Schotter oder Molasse.
Età
- Geomorfologia
-
- Primo Pleistocene
- Età alla base
-
- Primo Pleistocene
Geografia
- Estensione geografica
- SE Hügel Irchel (ZH).
Paleogeografia e tettonica
-
- Höhere Deckenschotter
- Termini generici
- Tipo di origine
-
- sedimentaria
- Condizioni di formazione
- Schüttung in N Richtung.
Referenze
- Revisione
-
(2011) :
Quaternary glaciation history of northern Switzerland. E&G Quaternary Science Journal 60/2-3, 282-305
p.285: 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. 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’).