strati.ch - Lithostratigraphic Lexicon of Switzerland

Representation and status

Index: i6Bu
Color CMYK: cf. Formation de Vellerat
Color RGB: R: 170 G: 190 B: 165

Rank: lithostratigraphic Member (Subformation)
Validity: Unit is in Use
Status: valid formal name

Nomenclature

Deutsch: Bure-Member
Français: Membre de Bure
Italiano: Membro di Bure
English: Bure Member

Origin of the Name: Bure (JU)

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

Description

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

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

Components

Fossil Content

ostreids
crinoids

Hierarchy and sequence

Superordinate unit

Formation de Vellerat

Units at roof

Units at floor

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

Age

Age at top

late Oxfordian

Note about top

Oxfordien terminal

Age at base

late Oxfordian

Note about base

Oxfordien terminal

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

Geography

Geographical extent: Nord du canton du Jura (Ajoie et région de Glovelier) et sud de l’Alsace (France)
Type area: Ajoie (JU)

Type locality

Forage Bure (JU)
Site particularities
- typische Fazies
Site accessibility
- Bohrkern
Coordinates
- (2567650 / 1254670)
Note
- <p>forage d'exploration BUR-2 de la Transjurane (Gygi 2000b Pl.16 Profil RG454, Gygi 2000c)</p>

Type profile

Forage Bure (JU)
Site particularities
- typische Fazies
Site accessibility
- Bohrkern
Coordinates
- (2567650 / 1254670)
Note
- <p>Forage d'exploration BUR-2 de la Transjurane (Gygi 2000b Pl.16 Profil RG454, Gygi 2000c)</p>

Reference profiles

Muriaux (JU)
Site particularities
- Obergrenze
- typische Fazies
Coordinates
- (2564220 / 1232450)
Note
- Combe de la Rochette, 1 km W Muriaux

Palaenography and tectonic

Malm

Tectonic unit (resp. main category)

Jura :
Juragebirge

Kind of protolith

sedimentary

Metamorphism: non metamorphic

References

Definition: 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

Definition: 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.

Membre de Bure