Membre de Retzwiller
Back to Laufen basinRepresentation and status
- Color CMYK
- (0%,0%,0%,100%)
- Color RGB
- R: 250 G: 220 B: 130
- Rank
- lithostratigraphic Member (Subformation)
- Validity
- Unit is in Use
- Status
- valid formal name
Nomenclature
- Deutsch
- Retzwiller-Member
- Français
- Membre de Retzwiller
- Italiano
- Membro di Retzwiller
- English
- Retzwiller Member
- Origin of the Name
-
Argilière de Retzwiller (France, Haut-Rhin), à l'ouest de Dannemarie
- Historical Variants
-
Mergel von Dammerkirch (Andreae 1884), Sables et marnes de Dannemarie et Wolfersdorf (Meyer 1928), Retzwiller Member (Pirkenseer et al. 2018)
Description
- Thickness
- 25 m à Retzwiller (Pirkenseer et al. 2018)
Components
- ostreids
- ostracods
- foraminifera
Mollusques marins d'eau peu profonde préservés in-situ (Roussé 2006), ostracodes et foraminifères benthiques. Occurence de foraminifères planctoniques remaniés (Crétacé tardif et Éocène).
Hierarchy and sequence
- Superordinate unit
- Subordinate units
- Units at roof
- Units at floor
Geography
- Geographical extent
- Présence locale (Retzwiller, Dornachbrugg) dans la partie méridionale du fossé du Haut-Rhin.
Palaenography and tectonic
- Paleogeography
- Rhine Graben
- Tectonic unit (resp. main category)
- Kind of protolith
-
- sedimentary
- Conditions of formation
-
Faciès d'eau calme.
References
- Definition
-
(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.215: Dominated by massive grey marls to silty marls, with occasionally intercalated thin, strongly bioturbated bioclast or mollusc-bearing micaceous fine sand beds and small in-situ oyster bioherms (sensu Roussé 2006). In the Retzwiller section the thickness reaches about 25 m.
A historically well-known part is the thin fossil-rich sandstone (formerly called “Sables marins de Wolfersdorf ”) in the lower part of the member. The absence of this fossiliferous sandstone in the drilling Hirtzbach (10 km distant) has been mentioned in Vonderschmitt (1942), further highlighting the regional restriction of the members of the Wahlebach Fm.