Ahornen-Member

Rappresentazione e statuto

Colore CMYK

(0%,8%,51%,4%)

Colore RGB

R: 245 G: 225 B: 120

Rango

Membro litostratigrafico (Sotto-formazione)

Uso

Unità in uso.

Status

termine formale valido

Nomenclatura

Deutsch

Ahornen-Member

Français

Membre du Ahornen

Italiano

Membro dell'Ahornen

English

Ahornen Member

Origine del nome

Ahornenrus (heute Malorrus) (GL)

Varianti storiche

Ahornenschichten (Frey 1965), Wildflysch = Ahornen-Schichten (Hantke et al. 2011), Ahornen Member (Menkveld-Gfeller et al. 2016)

Descrizione

Descrizione

Das Ahornen-Member ist charakterisiert durch das Auftreten von grünen, vulkanischen Gesteinsfragmenten im Sandstein. Die Basis des Members besteht häufig aus plattigem Mergelstein, welcher bereits zur Stad-Formation gehört.

Potenza

Meist 6-10 m (Frey 1965).

Componenti

Sandstein enthält grüne, vulkanische Gesteinsfragmente.

Gerarchia e successione

Limite superiore

Taveyannaz-Formation (tektonischer Kontakt)

Limite inferiore

Stad-Formation

Età

Geomorfologia

• Priaboniano

Osservazioni sul tetto

?

Età alla base

• Priaboniano

Osservazioni sulla base

?

Geografia

Estensione geografica

Zentral- und Ostschweiz (Reusstal bis Linthtal).

Località-tipo

• Ahornenrus = Malorrus (GL)
  Caratteristiche del sito
  • typische Fazies
  Agibilità del sito
  • Grat
  Coordinate
  • (2716100 / 1192700)
  Nota
  • Styger 1961 (Profil Bodenbach), Frey 1965

Paleogeografia e tettonica

• Terziario

Termini generici

• Lower Helvetic

Tipo di origine

• sedimentaria

Metamorfismo

non metamorfo

Referenze

Revisione

Menkveld-Gfeller Ursula, Kempf Oliver, Funk Hanspeter (2016) : Lithostratigraphic units of the Helvetic Palaeogene: review, new definition, new classification. Swiss J. Geosc. 109/2, 171-199

p.188: The Ahornen Member was first described by Frey (1965; ‘‘Ahornen-Schichten’’) at its type locality Ahornenrus (today Malorrus) (2716.100/1192.700). For further descriptions see Styger (1961; Bodenbach section). Lithology: The Ahornen Member that occurs at different locations of Central and Eastern Switzerland is characterized by the appearance of greenish volcanic rock fragments in the sandstone. This is in contrast to the remaining members of the Muot-da-Rubi Formation, in which such fragments are absent. The base here often consists of slaty marlstone, which already belongs to the Stad Formation. Overyling strata: Taveyannaz Formation, tectonic boundary; underlying strata: Stad Formation, Malor Member (exceptionally). Biostratiography: ?Priabonian. Current geographical extent: Central and Eastern Switzerland: Reuss valley to Linth valley. Tectonic units: Central and Eastern Switzerland: Lower Helvetic.