«Opalinus-Schichten» (des Helvetikums)
Representation and status
- Color CMYK
- N/A
- Color RGB
- R: 125 G: 125 B: 125
- Rank
- lithostratigraphic unit
- Validity
- Unit is not in Use
- Status
- obsolete term (disused)
Nomenclature
- Deutsch
- «Opalinus-Schichten» (des Helvetikums)
- Français
- «Couches à Opalinus» (de l'Helvétique)
- Italiano
- «Strati di Opalinus» (dell'Elvetico)
- English
- «Opalinus Beds» (of the Helvetic)
- Origin of the Name
-
Namengebendes Fossil: Ammonitenart Leioceras opalinum (Reinecke).
- Historical Variants
-
Opalinushorizont (Moesch 1881, 1893), Opalinusschichten, Opalinusthone, Opalinusgesteine (Moesch 1894), Opaninusschiefer (Moesch 1894, Baltzer, Oberholzer 1933, Brunnschweiler 1942), schistes noirs à nodules avec Harpoceras opalinum = schistes aaleniens à Harpoceras opalinum (Haug 1910), Opalinus Schichten (Seeber 1911)
Description
- Description
-
"sandige Tonschiefer (…), deren Tonanteil denjenigen des Sandes auch wirklich überfrittt" [Dollfus 1965 S.470]
Components
Fossil Content
- ammonites
Leioceras opalinum, Leioceras uncum
Age
- Age at top
-
- early Aalenian
- Age at base
-
- early Aalenian
Palaenography and tectonic
-
- Dogger of the Helvetics
- Tectonic unit (resp. main category)
- Kind of protolith
-
- sedimentary