Membre de Buix

Zur Übersicht

Darstellung, Status

Index
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CMYK-Farbe
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RGB-Farbe
R: 190 G: 180 B: 185
Rang
lithostratigraphisches Member
Gebrauch
Element ist in Gebrauch
Status
gültiger formeller Begriff
SKS-Notiz
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SKS-Datum
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Kommentar
Le Membre de Buix est en partie l'équivalent latéral du Membre du Tiergarten.

Nomenklatur

Deutsch
Buix-Member
Französisch
Membre de Buix
Italienisch

Membro di Buix

Englisch
Buix Member
Herkunft des Namens
Carrière Les Creppes, NW de Buix = Bux (JU)
Historische Varianten
Kreide von St. Ursanne auct., Buix Member (Gygi 2000b, Gygi 2000c), Membre de Buix (Comment & Ayer)
Nomenklatorischer Kommentar
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Synonyme

Nicht-Synonyme
Verwechslungsgefahr

Beschreibung

Beschreibung
Weisse, weiche, kreidige, ungeschichtete Kalksteine mit kleinen Biohermen, im oberen Teil treten Silex-Knollen auf.
Geomorphologischer Ausdruck
zone tendre
Mächtigkeit
0-35 m

Komponenten

Lithologien
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Mineralien
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Fossilien
  • Korallen

Hierarchie und Abfolge

Übergeordnete Einheit
Formation de St-Ursanne
Untergeordnete Einheiten
Laterales Äquivalent
Obergrenze
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Untergrenze
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Stratigraphische Diskussion
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Alter

Alter Top
mittleres Oxfordien
Bermerkungen zu Top
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Alter Basis
mittleres Oxfordien
Bermerkungen zu Basis
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Datierungsmethode
Biostratigraphie (ammonites de la Transversarium-Zone ; Gygi 1995)

Geografie

Paläogeografie
Partie nord du canton du Jura (Ajoie) et jura bâlois (région de Liesberg).
Typusregion
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Typlokalität
  • Buix (JU)
    Merkmale des Ortes
    • typical facies
    Zugänglichkeit des Ortes
    • quarry
    Koordinaten
    • (2569670 / 1259815)
    Notizen
    • Carrière Les Creppes (Gygi 2000b S.56 Profil RG347)
Typusprofil
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Referenzprofile
  • St-Ursanne (JU)
    Merkmale des Ortes
    • lower boundary
    • typical facies
    Zugänglichkeit des Ortes
    • quarry
    Koordinaten
    • (2579200 / 1246370)
    Notizen
    • Referenzprofil im ehemaligen Steinbruch der Kalkfabrik in St-Ursanne (Pümpin 1965 Pl.1 Profil 2, Gygi 1982 Fig.4, Gygi 2000b p.56 Profil RG336, Gygi 2000c)
Point of interest
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Paläogeografie und Tektonik

Paläogeografie
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Herkunftstyp
  • sedimentär
Bildungsbedingungen
"Rauracien", crayeux (faciès lagunaire)
Sequenz
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Tektonische Einheit (bzw. Überbegriff)
Jura
  • Süddeutschland
  • Schwarzwald
  • Jura méridional
  • Vogesen
Metamorphose
unmetamorph
Metamorphosefazies
-
Bemerkung zur Metamorphose
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Referenzen

Erstdefinition
Gygi R. A. (2000): Integrated stratigraphy of the Oxfordian and Kimmeridgian (Late Jurassic) in northern Switzerland and adjacent southern Germany. , Denkschriften der Schweizerischen Akademie der Naturwissenschaften 104, 152 S.

p.56
Neubearbeitung
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.128: Buix Member (Gygi 2000b). Previously "Kreide von St. Ursanne" ; Member of the St-Ursanne Formation (Synonymy: Gygi 2000b p. 56) The Buix Member was renamed by Gygi (2000b. p. 56). lt is named after the village of Buix north of Porrentruy in Canton Jura (LK 1065 Bonfol) where it crops out in the quarry of Les Creppes (unpublished section RG 347) where it is easily accessible. However, the base ofthe member is not visible in that quarry. A complete outcrop of the member is in the quarry of the former lime works near the railway station of St-Ursanne, Canton Jura. This section has been studied in detail by Pümpin (1965. PI. 1. section 2). Gygi (2000b. p. 56) proposed beds 8-10 in Pümpin's section to be the reference section of the Buix Member. A schematic version of this section was later published by Gygi (1982. Fig. 4). This is section RG 336 at coordinates 579.200/246.370. LK 1085. St-Ursanne. The Buix Member is a massive, yellowish-white to pure white, more or less porous and friable limestone which was compared with chalk by Ziegler (1962). Coral bioherms occur in this unit near Leymen. France. Flüh, Canton Solothurn, and Delémont. St-Ursanne and Buix. Canton Jura. Locally, the limestone was slightly dolomitic. but the euhedral dolomite crystals have been dissolved and left empty pores as in the unpublished section RG 344. beds 3 and 8 near Courtemaîche, Canton Jura. In this case, the rock weathers in perpendicular rods as was observed by Liniger (1970. p. 7). Large chert nodules occur in the upper Buix Member in the sections RG 343 and 344 at Courtemaîche. The mean thickness of the member is about 35 m. The age was established biochronologically with ammonites by Gygi (1995. Fig. 2) that were found by V. Pümpin at St-Ursanne near the boundary between the Antecedens and the Luciaeformis Subzones in the Transversarium Zone. The Buix Member occurs in the Ajoie region in the northern part of Canton Jura and near Liesberg. Canton Baselland. It is the lagoonal facies of the upper St-Ursanne Formation (Fig. 1).
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Anwendungen
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