Baden-Member

Rappresentazione e statuto

Index

i7B

Colore CMYK

siehe Burghorn-Formation

Colore RGB

R: 195 G: 220 B: 245

Rango

Membro litostratigrafico (Sotto-formazione)

Uso

Unità in uso.

Status

termine formale valido

Discussione del statuto

Nomenclatura

Deutsch

Baden-Member

Français

Membre de Baden

Italiano

Membro di Baden

English

Baden Member

Origine del nome

Baden (AG)

Varianti storiche

Badenerschichten (Moesch 1867 S.178, Tobler 1905 Tab.3a, Disler 1941, Waibel & Burri 1961, Büchi et al. 1965, Hantke 1967), couches de Baden (de Tribolet 1872), Badener-Schichten (Renevier 1896), gamma = Badener Schichten = Zone à Perisphinctes Achilles + Zone à Streblites tenuilobatus (Haug 1911), Baden Member (Gygi 2000c), Couches de Baden, Séquanien pélagal

Nota sul nome

non: Baden-Formation (Papp 1963, Piller et al. 2022) im Zentralen Wiener Becken [Typlokalität des Badenian regional stage]

Descrizione

Descrizione

Mikritische, glaukonitische Kalksteine und Mergel mit zahlreichen Ammoniten (Perisphinctes) und Kieselschwämmen werden überlagert von 0,8 m grauen Mergeln (ohne Glaukonit und Fossilien).

Geomorfologia

Schwache morphologische Depression.

Potenza

Ca. 1-3 m, bis max. 6-10 m ; 1,80 m bei der Ruine Bessersetein (Gygi 2000c)

Componenti

• glauconite

• ammoniti
• spugne

Gerarchia e successione

Unità di rango superiore

• Burghorn-Formation

Unità sovrastante

• Wettingen-Member

Unità sottostante

• Villigen-Formation
• Letzi-Member

Età

Geomorfologia

• Primo Kimmeridgiano

Osservazioni sul tetto

Divisum-Zone : Idoceras balderum (Oppel)

Età alla base

• Primo Kimmeridgiano

Osservazioni sulla base

Platynota-Zone: Sutneria platynota (Reinecke)

Metodo di datazione

Biostratigraphie: Ammoniten der Platynota- bis Divisum-Zone (Gygi 1969, Gygi 2000c)

Geografia

Estensione geografica

Aargauer Jura, südlich und nördlich des Rheins, Gegend von Baden, Möriken, Villigen, Mellikon (und Weiach).

Regione-tipo

Ostaargau, Unteres Aaretal

Località-tipo

• Baden (AG), alter Bahntunnel
  Caratteristiche del sito
  • historische Fundstelle
  Agibilità del sito
  • Strassenanschnitt / Bahnanschnitt
  Coordinate
  • (2665410 / 1258360)
  Nota
  • <p>Typlokalität des Baden-Members am Südportal des alten Bahntunnels</p>

Sezione-tipo

• Besserstein (AG)
  Caratteristiche del sito
  • Obergrenze
  • Untergrenze
  • typische Fazies
  Agibilità del sito
  • Grat
  Coordinate
  • (2658100 / 1264010)
  Nota
  • Villiger Geissberg (Gygi 1969 Pl.17 Profil RG62, Gygi 2000c als Referenzprofil definiert)

Punti d'interesse

• Baden (AG), Felsenweg
  Caratteristiche del sito
  • Untergrenze
  Coordinate
  • (2664930 / 1258100)
  Nota
  • <p>Untergrenze des Baden-Members (Gygi 1969 Pl.17 Profil RG47, Gygi 2000c)</p>

Paleogeografia e tettonica

• Malm

Paleogeografia

Argovian Basin

Termini generici

• Jura :
  Juragebirge

Tipo di origine

• sedimentaria

Condizioni di formazione

"argovien"

Metamorfismo

non metamorfo

Referenze

Definizione

Moesch Casimir (1867) : Der Aargauer-Jura und die nördlichen Gebiete des Kantons Zürich geologisch untersucht und beschrieben. Beitr. geol. Karte Schweiz 4, 349 Seiten

S.178

Revisione

Gygi R. A. (2000) : Annotated index of lithostratigraphic units currently used in the Upper Jurassic of northern Switzerland. Eclogae geol. Helv. 93/1, 125-146

p.126: Baden Member (Moesch 1867) ; Member of an unnamed formation The Baden Member was named by Moesch (1867. p. 178) Badenerschichten. The name is derived from the city of Baden. Canton Aargau. northern Switzerland. Moesch did not specify a type locality. There is at present no complete outcrop of the member at Baden. The lower part of the member was measured at Baden by Gygi 1969. p. 17. section RG 47). coordinates 664.930/258.100 (LK 1070 Baden). The member consists there of thin beds of glauconitic and marly micritic limestone with siliceous sponges. Intercalated are beds of glauconitic marl. The most abundant macrofossils are siliceous sponges and ammonites. A complete natural outcrop of the member was in 1961 100 m west of the ruin of Besserstein at Villigen. Canton Aargau. coordinates 658.100/264.010 (LK 1070 Baden) along a footpath. Slight cleaning with a pickaxe would be necessary in order to see the section today. The member has there a total thickness of 1.80 m and consists of two parts. Below is a micritic. marly limestone with glauconite, siliceous sponges and abundant ammonites. This massive bed is 1 m thick and is ovelain by 0.8 m of brownish gray marl without glauconite and macrofossils. This outcrop is in the upper part of section RG 62 in Gygi (1969. Pl. 17) that is designated here as the reference section of the Baden Member. The member could be biochronologically dated in the large quarry of Mellikon. Canton Aargau (section RG 70 in Gygi 1969. Pl. 17, beds 120-125). The ammonite Sutneria platynota (Reinecke) occurs at the base of the member and Idoceras balderum (Oppel) at the top of bed 124 and in the lowermost Wettingen Member above. The biochronological age of the Baden Member thus ranges from the beginning of the Platynota Chron to the early Divisum Chron (see Gygi 2000b. Fig. 40. refigured as Fig. 2 in this paper). The typical condensed and glauconitic facies with siliceous sponges of the Baden Member occurs in the area between the Rhine river in the north, the western part of Mt. Lägeren east of Baden in the east and Mt. Chestenberg near Möriken. Canton Aargau. in the west. The member grades to the northeast in the Klettgau valley into the Schwarzbach Formation and to the west (from west of Aarau) into the Reuchenette Formation.