Baden-Member

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Rappresentazione e status

Sigla
i7B
Colori CMYK
siehe Burghorn-Formation
Colori RGB
R: 195 G: 220 B: 245
Rango
Membro litostratigrafico
Uso
Unità in uso.
Status
termine formale valido
SCS nota
-
SCS data
-
Commento
Äquivalent zum Couvaloup-Member des südlichen Juras.

Nomenclatura

Tedesco
Baden-Member
Francese
Membre de Baden
Italiano
Membro di Baden
Inglese
Baden Member
Origine del nome

Baden (AG)

Varianti storiche
Badenerschichten (Moesch 1867 S.178, Tobler 1905 Tab.3a, Disler 1941, Büchi et al. 1965, Hantke 1967), Badener-Schichten (Renevier 1896), Baden Member (Gygi 2000c), Couches de Baden, Séquanien pélagal
Osservazioni sul nome
-

Sinonimi

Sinonimo
Non-sinonimo
Confusione possibile

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).

Espressione geomorfologica
Schwache morphologische Depression.
Potenza
Ca. 1-3 m, bis max. 6-10 m ; 1,80 m bei der Ruine Bessersetein (Gygi 2000c)

Componenti

Litologia
  • calcare
  • marna
  • limestone, micritic
Minerali
  • glauconite
Fossili
  • ammoniti
  • spugne

Gerarchia e successione

Unità di rango superiore
Burghorn-Formation
Unità di rango inferiore
Unità sovrastante
Unità sottostante
Letzi-Member
Equivalente laterale
Limite superiore
-
Limite inferiore
-
Osservazioni sulla stratigrafia
-

Età

Età al tetto
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
Località-tipo
  • Baden (AG)
    Caratteristiche del sito
    • historical site
    Agibilità del sito
    • road cut
    Coordinate
    • (2665410 / 1258360)
    Nota
    • Südportal alter Bahntunnel
Sezione-tipo
  • Besserstein (AG)
    Caratteristiche del sito
    • upper boundary
    • lower boundary
    • typical facies
    Agibilità del sito
    • mountain ridge
    Coordinate
    • (2658100 / 1264010)
    Nota
    • Villiger Geissberg (Gygi 1969 Pl.17 Profil RG62, Gygi 2000c als Referenzprofil definiert)
Sezione di riferimento
-
Punti d'interesse
  • Baden (AG)
    Caratteristiche del sito
    • lower boundary
    Coordinate
    • (2664930 / 1258100)
    Nota
    • Gygi 1969 Pl.17 Profil RG47, Gygi 2000c

Paleogeografia e tettonica

Paleogeografia
Argovian Basin,
Tipo di protolito
  • sedimentaria
Condizioni di formazione
"argovien"
Sequenza
-
Unità tettonica
Giura
  • S-DE
  • Schwarzwald
Metamorfismo
non metamorfo
Facies metamorfica
-
Osservazioni sul metamorfismo
-

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.

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Materiale e vario

Utilizzazione
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