Basiszone (der OSM)
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
- informal term
- Status discussion
Nomenclature
- Deutsch
- Basiszone (der OSM)
- Français
- Basiszone (de l'OSM)
- Italiano
- Basiszone (dell'OSM)
- English
- Basiszone (of the OSM)
- Historical Variants
- OSM Basiszone (Büchi 1958), "Bituminöse Mergel", Basiszone der OSM (Büchi 1960, Büchi et al. 1965, Büchi & Schlanke 1977, Naef 2015)
Description
- Geomorphology
- Relativ rasch verwitternd, nur mässig verfestigt.
- Thickness
- 50-70 m im Norden, bis 500 m im Süden (Büchi 1960). Ca. 225 m in der Tiefbohrung St. Gallen (Schlancke 2015).
Hierarchy and sequence
- Units at roof
- Units at floor
Age
- Age at top
-
- Langhian
- Age at base
-
- late Burdigalian
- Dating Method
- Basales «Tortonien» (Büchi 1960).
Palaenography and tectonic
-
- OSM-I
- Tectonic unit (resp. main category)
- Kind of protolith
-
- sedimentary
- Metamorphism
- non metamorphic