Membre de Bure

Darstellung und Status

Index

i6Bu

Farbe CMYK

cf. Formation de Vellerat

Farbe RGB

R: 170 G: 190 B: 165

Rang

lithostratigraphisches Member (Subformation)

Gebrauch

Element ist in Gebrauch

Status

gültiger formeller Begriff

Nomenklatur

Deutsch

Bure-Member

Français

Membre de Bure

Italiano

Membro di Bure

English

Bure Member

Herkunft des Namens

Bure (JU)

Historische Varianten

Humeralis-Mergel = Marnes à Humeralis auct., Bure-Schichten (Gygi 1995 S.11), Bure-Member (Gygi 2000a/b), Bure Member (Gygi 2000b, Gygi 2000c)

Beschreibung

Beschreibung

Fossiles : Crinoïdes et huîtres (à Boncourt (JU))

Geomorphologie

Rarement affleurant.

Mächtigkeit

4-15 m (Aufranc et al. 2016), 10 m à la localité-type (Gygi 2000b/c).

Komponenten

• Ostreideen
• Crinoideen

Hierarchie und Abfolge

Übergeordnete Einheit

• Formation de Vellerat

Hangendes

• Membre de la May
• Formation de Courgenay

Liegendes

• Hauptmumienbank-Member
• Membre de l’Oolithe rousse

Untergrenze

Transition tant verticale que latérale depuis le Membre de l'Oolithe rousse.

Alter

Alter Top

• spätes Oxfordien

Bermerkungen zu Top

Oxfordien terminal

Alter Basis

• spätes Oxfordien

Bermerkungen zu Basis

Oxfordien terminal

Datierungsmethode

Minéralogie des argiles (Gygi & Persoz 1986 Pl.1a), stratigraphie séquentielle (Gygi et al. 1998 Fig.2).

Geografie

Geographische Verbreitung

Nord du canton du Jura (Ajoie et région de Glovelier) et sud de l’Alsace (France)

Typusregion

Ajoie (JU)

Typlokalität

• Bure (JU)
  Merkmale des Ortes
  • typische Fazies
  Zugänglichkeit des Ortes
  • Bohrkern
  Koordinaten
  • (2567650 / 1254670)
  Notizen
  • forage d'exploration BUR-2 de la Transjurane (Gygi 2000b Pl.16 Profil RG454, Gygi 2000c)

Typusprofil

• Bure (JU)
  Merkmale des Ortes
  • typische Fazies
  Zugänglichkeit des Ortes
  • Bohrkern
  Koordinaten
  • (2567650 / 1254670)
  Notizen
  • forage d'exploration BUR-2 de la Transjurane (Gygi 2000b Pl.16 Profil RG454, Gygi 2000c)

Referenzprofile

• Muriaux (JU)
  Merkmale des Ortes
  • Obergrenze
  • typische Fazies
  Koordinaten
  • (2564220 / 1232450)
  Notizen
  • Combe de la Rochette, 1 km W Muriaux

Paläogeografie und Tektonik

• Malm

Tektonische Einheit (bzw. Überbegriff)

• Jura :
  Juragebirge

Herkunftstyp

• sedimentär

Metamorphose

unmetamorph

Referenzen

Erstdefinition

Gygi R. A. (1995) : Datierung von Seichtwassersedimenten des Späten Jura in der Nordwestschweiz mit Ammoniten Eclogae Geol. Helv. 88/1, 1-58

S.11 Fig.2

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: Bure Member (Gygi 1995) ; Previously "Humeralis-Mergel"). Member of the Vellerat Formation ; Synonymy: Gygi (2000b page 59) The Bure Member was renamed by Gygi (1995. p. 11 and Fig. 2). The name is derived from the village of Bure northwest of Porrentruy in Canton Jura (LK 1064 Montbéliard). Outcrops of this marly member are always artificial and temporary. A complete section of the member was provided by the exploration well BUR 2 for the Transjurane superhighway. The well was measured and published by Gygi (2000b. PI. 16) as section RG 454 at coordinates 567.649/254.670. LK 1065 Bonfol. This is the type section. The Bure Member is mainly a soft grey marl, but in some places like the type locality there are thin intercalations of limestone. The thickness is almost exactly 10 m at the type locality. The member contains neither ammonites (Gygi 1995, Fig. 2) nor dinoflagellates (Ghasemi et al.. 1999). It could only be dated by correlations with clay minerals (Gygi & Persoz 1986. PI. 1A, correlation 1) and sequence stratigraphy (Gygi et al. 1998. Fig. 2. sequence boundary O 7 The geographical range of the Bure Member externds over the northern Canton Jura (Ajoie region) and adjacent southern Alsace (France), see Fischer (1965. p. 19 and 58/59) and to the south to Glovelier. Canton Jura. Further south and to the east the member grades into the Oolithe rousse Member and ultimately into the Crenularis Member that can be dated with ammonites at the Bimammatum Subchron.