Formation de Rossemaison

Representation and status

Color RGB

R: 210 G: 190 B: 100

Rank

lithostratigraphic Formation

Validity

Unit is in Use

Status

valid formal name

Nomenclature

Deutsch

Rossemaison-Formation

Français

Formation de Rossemaison

Italiano

Formazione di Rossemaison

English

Rossemaison Formation

Origin of the Name

Forage au nord de Rossemaison (JU)

Historical Variants

Terre jaune = Gelberde auct., Rossemaison Formation (Pirkenseer et al. 2018)

Description

Thickness

4-5 bis max. 70-140 m (Pirkenseer et al. 2018)

Hierarchy and sequence

Subordinate units

• Calcaire d'eau douce de Courcelon
• «Raitsche»

Units at roof

• Groupe de Froidefontaine

Upper boundary

contact net avec les marnes gris foncé ou une lumachelle à huîtres et riche en quartz du Groupe de Froidefontaine

Lower boundary

Sidérolithique: passage graduel, avec matériel remanié

Age

Age at top

• early Oligocene

Age at base

• late Eocene

Dating Method

Micromammifères de la zone MP20 et charophytes de la zone MP21 (Gander 2013, Pirkenseer et al. 2018, Mojon et al. 2018).

Geography

Geographical extent

Dépôts restreints à la partie centrale du Bassin de Delémont.

Type area

Bassin de Delémont (JU)

Type profile

• Forage Rossemaison (JU)
  Site particularities
  • Obergrenze
  • Untergrenze
  • typische Fazies
  Site accessibility
  • Bohrkern
  Coordinates
  • (2592870 / 1244480)
  Note
  • <p>Forage COM-F5: Weidmann 1990, Pirkenseer et al. 2018, Mojon et al. 2018</p>

Reference profiles

• Forage Courrendlin (JU)
  Site particularities
  • Obergrenze
  • Untergrenze
  • typische Fazies
  Site accessibility
  • Bohrkern
  Coordinates
  • (2595695 / 1242795)
  Note
  • <p>Forages HRT-F8/9: Weidmann 1990, Pirkenseer et al. 2018, Mojon et al. 2018</p>

Palaenography and tectonic

Tectonic unit (resp. main category)

• Delémont-Becken

Kind of protolith

• sedimentary

References

Definition

Pirkenseer Claudius, Rauber Gaëtan, Roussé Stéphane (2018) : A revised Palaeogene lithostratigraphic framework for the Northern Swiss Jura and the Southern Upper Rhine Graben and its relationship to the North Alpine Foreland Basin. Riv. Italiana Pal. Strat. 124/1, 163–246

p.177: Generally yellow to red marls with variable sand content and reworked Sidérolithique components that are limited to the central Delémont subbasin (Liniger 1925). Locally evaporites (gypsum), lacustrine limestones (“Raiche, Raitsche”) and conglomerates are intercalated (e.g. Rollier 1910), thus hinting at a fluvio-lacustrine, probably endorheic environment. The Rossemaison Fm has been historically (mining) subdivided in four units (see Liniger 1925), which however cannot be followed throughout the subbasin.

The Rossemaison Fm pinches out towards the southern basin margin, with a variable maximum thickness of 70 m (drilling COM-F5; 128.0 to 65.0 m, Fig. 10) to more than 140 m near Delémont (abandoned mine Près Grebis; Liniger 1925). At the subbasin margin the thickness ranges between 10 m (Châtillon; Gander 2013) and 4-5 m (drilling HRT-F8; 21.9 to 19.2 m, Fig. 12).

Important Publications

Liniger H. (1925) : Geologie des Delsberger Beckens und der Umgebung von Movelier. Beitr. Geol. Karte Schweiz (N.F.) 55/4, 82 Seiten