Ahornen-Member
Représentation et statut
- Couleur CMYK
- (0%,8%,51%,4%)
- Couleur RGB
- R: 245 G: 225 B: 120
- Rang
- Membre lithostratigraphique (Sous-formation)
- Usage
- Ce terme est en usage.
- Status
- terme formel valide
Nomenclature
- Deutsch
- Ahornen-Member
- Français
- Membre du Ahornen
- Italiano
- Membro dell'Ahornen
- English
- Ahornen Member
- Origine du nom
- Variantes historiques
-
Ahornenschichten (Frey 1965), Wildflysch = Ahornen-Schichten (Hantke et al. 2011), Ahornen Member (Menkveld-Gfeller et al. 2016)
Description
- Description
-
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.
- Épaisseur
- Meist 6-10 m (Frey 1965).
Composants
Sandstein enthält grüne, vulkanische Gesteinsfragmente.
Hiérarchie et succession
- Limite supérieure
-
Taveyannaz-Formation (tektonischer Kontakt)
- Limite inférieure
-
Stad-Formation
Âge
- Âge au sommet
-
- Priabonien
- Note sur le sommet
-
?
- Âge à la base
-
- Priabonien
- Note sur la base
-
?
Géographie
- Extension géographique
- Zentral- und Ostschweiz (Reusstal bis Linthtal).
- Localité-type
-
-
Ahornenrus = Malorrus (GL)
Particularités du site- typische Fazies
- Grat
- (2716100 / 1192700)
- Styger 1961 (Profil Bodenbach), Frey 1965
-
Ahornenrus = Malorrus (GL)
Paléogéographie et tectonique
-
- Tertiaire
- Termes génériques
- Type de protolithe
-
- sédimentaire
- Métamorphisme
- non métamorphique
Références
- Révision
-
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.